Md Motaher Hossain | Bangabandhu Sheikh Mujibur Rahman Agricultural University (original) (raw)

Papers by Md Motaher Hossain

Online Journal of Biological Sciences, 2024

Plant viruses give rise to potential loss to global crop production and have the potential to cau... more Plant viruses give rise to potential loss to global crop production and have the potential to cause widespread damage. Potato virus Y (PVY) is a plant virus that belongs to the genus Potyvirus and the family Potyviridae and it is considered a major concern, particularly for solanaceous crops such as potatoes. PVY represents the largest cluster of plant viruses, encompassing over 111 recognized and 86 tentative species across 30 plant families. Its broad geographic distribution extends over the globe, with a notable prevalence in temperate and subtropical climates where potato cultivation is extensive. As a monopartite virus with a single strand of positive-sense RNA, PVY manifests diverse strains that induce varied symptoms in potato plants, presenting challenges in strain categorization. PVY transmission occurs through both vertical and horizontal pathways, with aphids being the most efficient vectors. Mechanical transmission and agricultural practices can also contribute to the spread of the virus, impacting the growth and physiological functions of plants. Climate factors are very important in shaping the dynamics of plant viral diseases in plants, with varied climatic conditions fostering the emergence of more virulent virus strains. Temperature, humidity and precipitation, directly and indirectly, influence vector abundance, virus replication and host susceptibility, thereby modulating PVY transmission dynamics. Managing PVY in potato crops requires a multifaceted approach due to its significant economic impact and complex transmission dynamics. Strategies include cultural methods, host-plant resistance, chemical interventions, vector control and emerging techniques like cryotherapy and nanomaterial applications. Understanding the profound impact of climate variables on the epidemiology and management of PVY underscores the urgent need for proactive measures. This study offers a comprehensive review of recent findings regarding the intricate relationship between climate variables such as temperature, CO2 levels, light intensity, relative humidity, rainfall and wind velocity-and their significant influence on PVY infection severity and aphid vector population dynamics. Insights gleaned from this review will aid in formulating enhanced management strategies to combat the spread of this significant viral pathogen.

Online Journal of Biological Sciences, 2024

The pivotal role of honeybees as global pollinators underscores their significance in ecological ... more The pivotal role of honeybees as global pollinators underscores their significance in ecological and agricultural systems. However, the beekeeping industry faces a significant challenge due to the improper utilization of pesticides, resulting in adverse effects on honeybee populations. This comprehensive review endeavors to investigate the toxicity of pesticides to honeybees, examining the various routes of exposure. Furthermore, it aims to delineate the repercussions of pesticide exposure on honeybee foraging behavior and the quality of essential hive products. Additionally, the review explores effective strategies to mitigate pesticide risks to advance contemporary apiculture practices. Pesticides, inherently poisonous, disrupt crucial physiological and behavioral mechanisms in honeybees. Notably, organophosphates and carbamates function as neuroinhibitors by impeding the acetylcholine neurotransmitter action in the insect nervous system. Among the insecticides, imidacloprid, clothianidin, and thiamethoxam, classified as neonicotinoids, demonstrated high toxicity even at minimal exposure doses. Acaricides, while less toxic to bees than their target parasites, pose potential risks when excessive residues accumulate in combs, impacting bee health adversely. Moreover, pesticides contaminate hive products, with beeswax identified as the most heavily contaminated, followed by pollen. The degree of pesticide contamination in pollen samples correlates with the detected pesticide quantities. Analyses of two key hive products, honey, and pollen, reveal that approximately 90% of pesticide residues are found in pollen, while honey contains 50%. The contamination of hive products underscores the pervasive nature of pesticide exposure within the honeybee environment. Encouraging the use of Integrated Pest Management (IPM) strategies among farmers emerges as a crucial recommendation. This approach not only safeguards beneficial insect diversity but also enhances agroecosystem services, ultimately ensuring a secure global food supply in the future.

OnLine Journal of Biological Sciences, 2024

Arbuscular Mycorrhiza (AM) fungi are recognized as bioprotectors of plants for their ability to e... more Arbuscular Mycorrhiza (AM) fungi are recognized as bioprotectors of plants for their ability to enhance plant health and provide protection against pathogens. This study determines the ability of AM fungi (mixed AM inoculum of Glomus mosseae) to suppress the damping off disease of brinjal and tomato seedlings affected by the pathogenic fungi. This experiment consisted of two factors viz. AM fungi inoculation (inoculated and non-inoculated) and pathogen inoculation (Sclerotium rolfsii, Rhizoctonia solani, Fusarium oxysporum, and control). A completely randomized design was used to lay out the treatments, with three replicates per treatment. Preliminary experiments were conducted to select the virulent isolates of Sclerotium rolfsii, Rhizoctonia solani, and Fusarium oxysporum against tomato and brinjal seedlings before setting the experiment for integration of AM fungi. The interaction of AM fungi and root-infecting pathogens was investigated under control conditions. Inoculation with pathogenic fungi Sclerotium rolfsii, Rhizoctonia solani, and Fusarium oxysporum significantly increased damping off disease and reduced the plant height, root length, root, and shoot weight of brinjal and tomato compared to control. Seedlings inoculated with AM fungi had a lower incidence of damping off disease than AM fungi non-inoculated seedlings in spite of pathogenic fungi inoculation. About 50% of the pre-and post-emergence damping off disease was reduced due to AM fungi inoculation in brinjal and tomato. The root colonization by AM fungi and AM fungi spore density in the rhizosphere of brinjal and tomato was also higher in the AM fungi inoculated seedlings. The plant height, root length, and root and shoot weight of brinjal and tomato were also increased due to AM fungi inoculation. Therefore, the AM fungi can be inoculated to suppress the damping off diseases and vigorous seedling production of brinjal and tomato.

OnLine Journal of Biological Sciences, 2024

Rice, a primary staple, confronts a multitude of biotic and abiotic stresses. Drought and salinit... more Rice, a primary staple, confronts a multitude of biotic and abiotic stresses. Drought and salinity, exacerbated by climate change and blast disease caused by Magnaporthe oryzae, significantly contribute to yield losses. To tackle the problems, two types of seaweeds-one known as Hypnea musciformis and another unknown-were collected from Saint Martin, Cox's Bazar, Bangladesh and then examined for the potential of their extracts to stimulate growth and improve resistance to drought, salinity and blast disease in rice. Molecular identification based on cytochrome C Oxidase subunit I (COI) gene sequence, the unknown seaweed was identified as Gracilaria tenuistipitata. Seaweed extracts were prepared from seaweed at different pH (8, 9, 10) and temperature (40, 50, 60, 70, 80°C) regimes. The laboratory and pot experiments were set up using a Completely Randomized Design (CRD), with three replications for each treatment. All trials were conducted ethically and data were analyzed using ANOVA followed by Duncan's Multiple Range Test (DMRT) to determine the statistical significance (p = 0.05) of treatment means. Priming rice seeds with the extracts significantly increased germination rates and seedling vigor. Furthermore, seedlings grown in media amended with seaweed extracts exhibited enhanced growth and chlorophyll content compared to the control. Seaweed extracts also demonstrated the ability to ameliorate drought and salt stress while protecting rice plants from the blast pathogen M. oryzae. Among the two seaweeds tested, G. tenuistipitata was found to promote higher plant growth and biotic and abiotic stress tolerance in rice compared to Hypnea musciformis. Optimal extraction conditions, particularly low temperature (40°C) and pH 9, were identified as key factors in maximizing the bioactivity of the extracts. From these results, it can be concluded that seaweed extracts, particularly those from H. musciformis and G. tenuistipitata collected from Saint Martin, Cox's Bazar, Bangladesh, could be utilized as potential bio-stimulants and stress alleviators in rice cultivation, contributing to improved growth and resilience in the face of environmental changes.

Online Journal of Biological Sciences, 2024

This openaccess article is distributed under a Creative Commons Attribution (CC-BY) 4.0 license.

Online Journal of Biological Sciences, 2024

Vegetable beans, members of the Fabaceae family, have a rich historical significance as a source ... more Vegetable beans, members of the Fabaceae family, have a rich historical significance as a source of plant-based proteins and nutrients. They have been cultivated worldwide for centuries, enriching the nutritional landscape and constituting a crucial component of human nutrition. The wide array of beans, including common bean, lima bean, tepary bean, mung bean, yard long bean, moth bean, adzuki bean, garbanzo bean, broad bean, soybean, velvet bean, carob bean, sword bean and jack bean, offers a plethora of health benefits, including the prevention of chronic diseases. However, the production and utilization of these vegetable beans face significant challenges, such as poor soil fertility, pest infestation and diseases. In response, innovative approaches like molecular breeding, precision agriculture and UAVbased phenotyping have been explored. These methods aim to mitigate the reliance on chemical treatments and promote sustainable farming practices. Furthermore, a range of disease control strategies, encompassing biological, chemical and cultural controls, have been adopted to combat the challenges posed by pests and diseases. This study offers a comprehensive review of vegetable beans, covering various aspects such as their nutritional composition, global production and consumption trends, advancements in cultivation techniques and strategies for managing diseases. Drawing upon a meticulous analysis of pertinent literature and scholarly resources, this review serves as a valuable resource for researchers and growers alike who are interested in optimizing vegetable bean production through sustainable agricultural practices.

Southern blight of tomato caused by Sclerotium rolfsii can cause severe plant mortality and yield... more Southern blight of tomato caused by Sclerotium rolfsii can cause severe plant mortality and yield losses. The use of rhizobacteria for the biological control of Southern blight disease is a potent alternative to chemical fungicides. Although rhizobacteria are prolific candidates, comprehensive reports regarding their use in tomato disease management are limited. The present study screened six rhizobacterial strains for antagonism against S. rolfsii in dual culture and culture filtrate assays. The selected promising strains were tested further for plantgrowth-promoting and biocontrol potentials under in vitro, greenhouse, and field conditions. Of the six strains screened, Stenotrophomonas maltophilia PPB3 and Bacillus subtilis PPB9 showed the superior performance displaying the highest antagonism against S. rolfsii in dual culture (PPB3 88% and PPB9 71% inhibition), and culture filtrate assays (PPB3 53-100% and PPB9 54-100% inhibition at various concentrations). Oxalic acid produced by S. rolfsii was significantly inhibited by both rhizobacteria and supported their growth as a carbon source. The strains produced hydrogen cyanide, chitinases, siderophores, biofilm, and indole acetic acid. They showed the potential to solubilize phosphate and fix nitrogen. Seed treatment with S. maltophilia PPB3 and B. subtilis PPB9 improved seed germination and tomato seedling vigour. Significant increases in plant growth, chlorophyll contents, and N, P, and K concentrations were attained in bacterized plants compared to non-treated controls. The application of antagonists on container-grown seedlings in a greenhouse environment and field-grown tomato plants reduced symptoms of damping-off and Southern blight. The sclerotial counts decreased significantly in these soils. Bacteria-inoculated plants had a higher yield than those in the non-treated control. Bacteria colonized the entire roots, and their populations increased significantly in the protected plants. The results show the potential capabilities of S. maltophilia PPB3 and B. subtilis PPB9 for growth promotion, nutrient acquisition, and biocontrol of southern blight disease in tomatoes.

Wheat (Triticum aestivum L.), a vital cereal, faces significant challenges from common root rot a... more Wheat (Triticum aestivum L.), a vital cereal, faces significant challenges from common root rot and spot blotch diseases caused by Bipolaris sorokiniana. This study aimed to explore the potential of plant growth promoting rhizobacteria (PGPR) to enhance wheat growth, reduce fertilizer input, and combat Bipolaris diseases. Two PGPR isolates, selected for their superior antagonistic properties, were identified as Stenotrophomonas koreensis RB11 and Bacillus amyloliquefaciens RB12. These PGPR strains displayed multiple plant growth promoting and biocontrol attributes, including phosphate solubilization, indole-3-acetic acid production, nitrogen fixation and antagonism against B. sorokiniana and other fungi. Wheat seed priming with the PGPR significantly improved germination, plant growth, nutrient content and biomass carbon accumulation in the rhizosphere soil. Importantly, the application of RB11 and RB12 allowed for a 25% and 50% reduction in nitrogen fertilizer usage, respectively, without compromising the yield. RB11 and RB12 also demonstrated potent inhibitory effects on B. sorokiniana conidial germination and significantly controlled common root rot and spot blotch in wheat, similar to those observed with the fungicide Protaf 250EC. Overall, this study underscores the multifaceted roles of S. koreensis RB11 and B. amyloliquefaciens RB12 in promoting wheat growth, reducing fertilizer inputs and effectively suppressing wheat pathogens. These findings contribute to the development of PGPR-based strategies for sustainable crop production and disease control.

Bipolaris leaf blotch, induced by Bipolaris sorokiniana, poses a notable risk to wheat cultivatio... more Bipolaris leaf blotch, induced by Bipolaris sorokiniana, poses a notable risk to wheat cultivation, resulting in considerable annual declines in yield. Plant Growth-Promoting Rhizobacteria (PGPR) are acknowledged for their colonization of the wheat rhizosphere and provision of various advantages to plants, including disease control and improved growth. This investigation seeks to explore the feasibility of utilizing PGPR strains as a viable substitute for harmful chemical inputs to combat Bipolaris leaf blotch and foster the growth of three wheat varieties while pinpointing the optimal PGPR-wheat variety combination for future field application. Laboratory and pot experiments were conducted utilizing a Completely Randomized Design (CRD) with three replications for each treatment. Data Analysis Involved Analysis of Variance (ANOVA) followed by Duncan's Multiple Range Test (DMRT) to ascertain the statistical significance (p = 0.05) of treatment effects. Following an initial screening of seven PGPR isolates for their in vitro antifungal activities against B. sorokiniana, two promising antagonists, Bacillus subtilis PPB9 and Bacillus amyloliquefaciens PPB12, were selected for further evaluation due to their multiple plant-growth-promoting and biocontrol characteristics. Subsequent pot experiments in a growth room revealed that seed treatment followed by foliar spraying with these strains effectively suppressed Bipolaris leaf blotch infection across all three wheat varieties-Kanchan, Shatabdi and BARI gom-27, compared to the untreated control. Additionally, PGPR treatment led to significantly (p = 0.05) higher levels of root and shoot growth compared to untreated plants. The efficacy of the two PGPR strains varied in disease suppression and growth promotion, with B. amyloliquefaciens PPB12 outperforming B. subtilis PPB9. Similarly, among the three wheat varieties, Shatabdi exhibited a more prominent response to PGPR treatment. These findings emphasize the importance of carefully selecting rhizobacterial strains to effectively manage Bipolaris leaf blotch and enhance wheat growth. The study accentuates the significant potential of Bacillus strains and their compatibility with a preferred wheat variety, offering a novel and sustainable alternative for Bipolaris leaf blotch management and wheat cultivation improvement.

Abstract Peronosporomycetes are devastating pathogens to numerous crop, ornamental, and native pl... more Abstract Peronosporomycetes are devastating pathogens to numerous crop, ornamental, and native plants. They are phylogenetically distinct from those of fungi and hence most of the fungicides are ineffective against them. A large body of literature reveals that several bacterial genera such as Pseudomonas, Bacillus, Burkholderia, Lysobacter, Enterobacter, etc. exert antagonistic activities against the peronosporomycete phytopathogens in both in vitro and in vivo conditions. These bacterial strains originated from diverse habitats and ...

Bacteria in Agrobiology: Plant Probiotics, 2012

Comptes Rendus Biologies, 2015

Journal of Oleo Science, 2013

Penicillium simplicissimum GP17-2 is a plant growth-promoting fungus (PGPF) and an inducer of sys... more Penicillium simplicissimum GP17-2 is a plant growth-promoting fungus (PGPF) and an inducer of systemic defense responses. The mechanisms underlying the effect of GP17-2 on the reduction of cucumber leaf damage caused by the anthracnose pathogen Colletotrichum orbiculare were investigated. Cucumber leaves treated with the culture filtrate (CF) of GP17-2 exhibited a clear systemic resistance against subsequent infection with C. orbiculare. The number and size of lesions caused by the disease were reduced in CF-treated plants, in comparison with that in the control plants. The results showed that CF treatment could trigger a set of defense responses, including the production of hydrogen peroxide, formation of lignin, emission of ultra-weak photons, accumulation of salicylic acid, and increase in the transcription of the genes for the defense-related enzymes chitinase and peroxidase. Furthermore, subsequent inoculation of CFpretreated plants with C. orbiculare resulted in higher systemic expression of the genes for chitinase, β-1,3glucanase, and peroxidase relative to nontreated, inoculated plants; this indicated that CF mediates a potentiation state in the plant, enabling it to mount a rapid and effective response on infection by C. orbiculare. Our results indicate that the ability of CF of GP17-2 to stimulate active oxygen species, lignification, SA accumulation, and defense gene activation and potentiation in the host is the possible mode of action of the GP17-2 elicitor and inducer of induced systemic resistance against C. orbiculare infection in cucumber plants.

Plant & cell physiology, 2007

Canadian Journal of Plant Pathology, 2008

Malgré qu'ils aient été négligés dans les études qui ont été consacrées aux champignons favo... more Malgré qu'ils aient été négligés dans les études qui ont été consacrées aux champignons favorisant la croissance des plantes (PGPF) ou à leurs métabolites, les mécanismes par lesquels les microbes bénéfiques non pathogènes médient la résistance systémique induite (RSI), ainsi que les ...

Online Journal of Biological Sciences, 2024

Plant viruses give rise to potential loss to global crop production and have the potential to cau... more Plant viruses give rise to potential loss to global crop production and have the potential to cause widespread damage. Potato virus Y (PVY) is a plant virus that belongs to the genus Potyvirus and the family Potyviridae and it is considered a major concern, particularly for solanaceous crops such as potatoes. PVY represents the largest cluster of plant viruses, encompassing over 111 recognized and 86 tentative species across 30 plant families. Its broad geographic distribution extends over the globe, with a notable prevalence in temperate and subtropical climates where potato cultivation is extensive. As a monopartite virus with a single strand of positive-sense RNA, PVY manifests diverse strains that induce varied symptoms in potato plants, presenting challenges in strain categorization. PVY transmission occurs through both vertical and horizontal pathways, with aphids being the most efficient vectors. Mechanical transmission and agricultural practices can also contribute to the spread of the virus, impacting the growth and physiological functions of plants. Climate factors are very important in shaping the dynamics of plant viral diseases in plants, with varied climatic conditions fostering the emergence of more virulent virus strains. Temperature, humidity and precipitation, directly and indirectly, influence vector abundance, virus replication and host susceptibility, thereby modulating PVY transmission dynamics. Managing PVY in potato crops requires a multifaceted approach due to its significant economic impact and complex transmission dynamics. Strategies include cultural methods, host-plant resistance, chemical interventions, vector control and emerging techniques like cryotherapy and nanomaterial applications. Understanding the profound impact of climate variables on the epidemiology and management of PVY underscores the urgent need for proactive measures. This study offers a comprehensive review of recent findings regarding the intricate relationship between climate variables such as temperature, CO2 levels, light intensity, relative humidity, rainfall and wind velocity-and their significant influence on PVY infection severity and aphid vector population dynamics. Insights gleaned from this review will aid in formulating enhanced management strategies to combat the spread of this significant viral pathogen.

Online Journal of Biological Sciences, 2024

The pivotal role of honeybees as global pollinators underscores their significance in ecological ... more The pivotal role of honeybees as global pollinators underscores their significance in ecological and agricultural systems. However, the beekeeping industry faces a significant challenge due to the improper utilization of pesticides, resulting in adverse effects on honeybee populations. This comprehensive review endeavors to investigate the toxicity of pesticides to honeybees, examining the various routes of exposure. Furthermore, it aims to delineate the repercussions of pesticide exposure on honeybee foraging behavior and the quality of essential hive products. Additionally, the review explores effective strategies to mitigate pesticide risks to advance contemporary apiculture practices. Pesticides, inherently poisonous, disrupt crucial physiological and behavioral mechanisms in honeybees. Notably, organophosphates and carbamates function as neuroinhibitors by impeding the acetylcholine neurotransmitter action in the insect nervous system. Among the insecticides, imidacloprid, clothianidin, and thiamethoxam, classified as neonicotinoids, demonstrated high toxicity even at minimal exposure doses. Acaricides, while less toxic to bees than their target parasites, pose potential risks when excessive residues accumulate in combs, impacting bee health adversely. Moreover, pesticides contaminate hive products, with beeswax identified as the most heavily contaminated, followed by pollen. The degree of pesticide contamination in pollen samples correlates with the detected pesticide quantities. Analyses of two key hive products, honey, and pollen, reveal that approximately 90% of pesticide residues are found in pollen, while honey contains 50%. The contamination of hive products underscores the pervasive nature of pesticide exposure within the honeybee environment. Encouraging the use of Integrated Pest Management (IPM) strategies among farmers emerges as a crucial recommendation. This approach not only safeguards beneficial insect diversity but also enhances agroecosystem services, ultimately ensuring a secure global food supply in the future.

OnLine Journal of Biological Sciences, 2024

Arbuscular Mycorrhiza (AM) fungi are recognized as bioprotectors of plants for their ability to e... more Arbuscular Mycorrhiza (AM) fungi are recognized as bioprotectors of plants for their ability to enhance plant health and provide protection against pathogens. This study determines the ability of AM fungi (mixed AM inoculum of Glomus mosseae) to suppress the damping off disease of brinjal and tomato seedlings affected by the pathogenic fungi. This experiment consisted of two factors viz. AM fungi inoculation (inoculated and non-inoculated) and pathogen inoculation (Sclerotium rolfsii, Rhizoctonia solani, Fusarium oxysporum, and control). A completely randomized design was used to lay out the treatments, with three replicates per treatment. Preliminary experiments were conducted to select the virulent isolates of Sclerotium rolfsii, Rhizoctonia solani, and Fusarium oxysporum against tomato and brinjal seedlings before setting the experiment for integration of AM fungi. The interaction of AM fungi and root-infecting pathogens was investigated under control conditions. Inoculation with pathogenic fungi Sclerotium rolfsii, Rhizoctonia solani, and Fusarium oxysporum significantly increased damping off disease and reduced the plant height, root length, root, and shoot weight of brinjal and tomato compared to control. Seedlings inoculated with AM fungi had a lower incidence of damping off disease than AM fungi non-inoculated seedlings in spite of pathogenic fungi inoculation. About 50% of the pre-and post-emergence damping off disease was reduced due to AM fungi inoculation in brinjal and tomato. The root colonization by AM fungi and AM fungi spore density in the rhizosphere of brinjal and tomato was also higher in the AM fungi inoculated seedlings. The plant height, root length, and root and shoot weight of brinjal and tomato were also increased due to AM fungi inoculation. Therefore, the AM fungi can be inoculated to suppress the damping off diseases and vigorous seedling production of brinjal and tomato.

OnLine Journal of Biological Sciences, 2024

Rice, a primary staple, confronts a multitude of biotic and abiotic stresses. Drought and salinit... more Rice, a primary staple, confronts a multitude of biotic and abiotic stresses. Drought and salinity, exacerbated by climate change and blast disease caused by Magnaporthe oryzae, significantly contribute to yield losses. To tackle the problems, two types of seaweeds-one known as Hypnea musciformis and another unknown-were collected from Saint Martin, Cox's Bazar, Bangladesh and then examined for the potential of their extracts to stimulate growth and improve resistance to drought, salinity and blast disease in rice. Molecular identification based on cytochrome C Oxidase subunit I (COI) gene sequence, the unknown seaweed was identified as Gracilaria tenuistipitata. Seaweed extracts were prepared from seaweed at different pH (8, 9, 10) and temperature (40, 50, 60, 70, 80°C) regimes. The laboratory and pot experiments were set up using a Completely Randomized Design (CRD), with three replications for each treatment. All trials were conducted ethically and data were analyzed using ANOVA followed by Duncan's Multiple Range Test (DMRT) to determine the statistical significance (p = 0.05) of treatment means. Priming rice seeds with the extracts significantly increased germination rates and seedling vigor. Furthermore, seedlings grown in media amended with seaweed extracts exhibited enhanced growth and chlorophyll content compared to the control. Seaweed extracts also demonstrated the ability to ameliorate drought and salt stress while protecting rice plants from the blast pathogen M. oryzae. Among the two seaweeds tested, G. tenuistipitata was found to promote higher plant growth and biotic and abiotic stress tolerance in rice compared to Hypnea musciformis. Optimal extraction conditions, particularly low temperature (40°C) and pH 9, were identified as key factors in maximizing the bioactivity of the extracts. From these results, it can be concluded that seaweed extracts, particularly those from H. musciformis and G. tenuistipitata collected from Saint Martin, Cox's Bazar, Bangladesh, could be utilized as potential bio-stimulants and stress alleviators in rice cultivation, contributing to improved growth and resilience in the face of environmental changes.

Online Journal of Biological Sciences, 2024

This openaccess article is distributed under a Creative Commons Attribution (CC-BY) 4.0 license.

Online Journal of Biological Sciences, 2024

Vegetable beans, members of the Fabaceae family, have a rich historical significance as a source ... more Vegetable beans, members of the Fabaceae family, have a rich historical significance as a source of plant-based proteins and nutrients. They have been cultivated worldwide for centuries, enriching the nutritional landscape and constituting a crucial component of human nutrition. The wide array of beans, including common bean, lima bean, tepary bean, mung bean, yard long bean, moth bean, adzuki bean, garbanzo bean, broad bean, soybean, velvet bean, carob bean, sword bean and jack bean, offers a plethora of health benefits, including the prevention of chronic diseases. However, the production and utilization of these vegetable beans face significant challenges, such as poor soil fertility, pest infestation and diseases. In response, innovative approaches like molecular breeding, precision agriculture and UAVbased phenotyping have been explored. These methods aim to mitigate the reliance on chemical treatments and promote sustainable farming practices. Furthermore, a range of disease control strategies, encompassing biological, chemical and cultural controls, have been adopted to combat the challenges posed by pests and diseases. This study offers a comprehensive review of vegetable beans, covering various aspects such as their nutritional composition, global production and consumption trends, advancements in cultivation techniques and strategies for managing diseases. Drawing upon a meticulous analysis of pertinent literature and scholarly resources, this review serves as a valuable resource for researchers and growers alike who are interested in optimizing vegetable bean production through sustainable agricultural practices.

Southern blight of tomato caused by Sclerotium rolfsii can cause severe plant mortality and yield... more Southern blight of tomato caused by Sclerotium rolfsii can cause severe plant mortality and yield losses. The use of rhizobacteria for the biological control of Southern blight disease is a potent alternative to chemical fungicides. Although rhizobacteria are prolific candidates, comprehensive reports regarding their use in tomato disease management are limited. The present study screened six rhizobacterial strains for antagonism against S. rolfsii in dual culture and culture filtrate assays. The selected promising strains were tested further for plantgrowth-promoting and biocontrol potentials under in vitro, greenhouse, and field conditions. Of the six strains screened, Stenotrophomonas maltophilia PPB3 and Bacillus subtilis PPB9 showed the superior performance displaying the highest antagonism against S. rolfsii in dual culture (PPB3 88% and PPB9 71% inhibition), and culture filtrate assays (PPB3 53-100% and PPB9 54-100% inhibition at various concentrations). Oxalic acid produced by S. rolfsii was significantly inhibited by both rhizobacteria and supported their growth as a carbon source. The strains produced hydrogen cyanide, chitinases, siderophores, biofilm, and indole acetic acid. They showed the potential to solubilize phosphate and fix nitrogen. Seed treatment with S. maltophilia PPB3 and B. subtilis PPB9 improved seed germination and tomato seedling vigour. Significant increases in plant growth, chlorophyll contents, and N, P, and K concentrations were attained in bacterized plants compared to non-treated controls. The application of antagonists on container-grown seedlings in a greenhouse environment and field-grown tomato plants reduced symptoms of damping-off and Southern blight. The sclerotial counts decreased significantly in these soils. Bacteria-inoculated plants had a higher yield than those in the non-treated control. Bacteria colonized the entire roots, and their populations increased significantly in the protected plants. The results show the potential capabilities of S. maltophilia PPB3 and B. subtilis PPB9 for growth promotion, nutrient acquisition, and biocontrol of southern blight disease in tomatoes.

Wheat (Triticum aestivum L.), a vital cereal, faces significant challenges from common root rot a... more Wheat (Triticum aestivum L.), a vital cereal, faces significant challenges from common root rot and spot blotch diseases caused by Bipolaris sorokiniana. This study aimed to explore the potential of plant growth promoting rhizobacteria (PGPR) to enhance wheat growth, reduce fertilizer input, and combat Bipolaris diseases. Two PGPR isolates, selected for their superior antagonistic properties, were identified as Stenotrophomonas koreensis RB11 and Bacillus amyloliquefaciens RB12. These PGPR strains displayed multiple plant growth promoting and biocontrol attributes, including phosphate solubilization, indole-3-acetic acid production, nitrogen fixation and antagonism against B. sorokiniana and other fungi. Wheat seed priming with the PGPR significantly improved germination, plant growth, nutrient content and biomass carbon accumulation in the rhizosphere soil. Importantly, the application of RB11 and RB12 allowed for a 25% and 50% reduction in nitrogen fertilizer usage, respectively, without compromising the yield. RB11 and RB12 also demonstrated potent inhibitory effects on B. sorokiniana conidial germination and significantly controlled common root rot and spot blotch in wheat, similar to those observed with the fungicide Protaf 250EC. Overall, this study underscores the multifaceted roles of S. koreensis RB11 and B. amyloliquefaciens RB12 in promoting wheat growth, reducing fertilizer inputs and effectively suppressing wheat pathogens. These findings contribute to the development of PGPR-based strategies for sustainable crop production and disease control.

Bipolaris leaf blotch, induced by Bipolaris sorokiniana, poses a notable risk to wheat cultivatio... more Bipolaris leaf blotch, induced by Bipolaris sorokiniana, poses a notable risk to wheat cultivation, resulting in considerable annual declines in yield. Plant Growth-Promoting Rhizobacteria (PGPR) are acknowledged for their colonization of the wheat rhizosphere and provision of various advantages to plants, including disease control and improved growth. This investigation seeks to explore the feasibility of utilizing PGPR strains as a viable substitute for harmful chemical inputs to combat Bipolaris leaf blotch and foster the growth of three wheat varieties while pinpointing the optimal PGPR-wheat variety combination for future field application. Laboratory and pot experiments were conducted utilizing a Completely Randomized Design (CRD) with three replications for each treatment. Data Analysis Involved Analysis of Variance (ANOVA) followed by Duncan's Multiple Range Test (DMRT) to ascertain the statistical significance (p = 0.05) of treatment effects. Following an initial screening of seven PGPR isolates for their in vitro antifungal activities against B. sorokiniana, two promising antagonists, Bacillus subtilis PPB9 and Bacillus amyloliquefaciens PPB12, were selected for further evaluation due to their multiple plant-growth-promoting and biocontrol characteristics. Subsequent pot experiments in a growth room revealed that seed treatment followed by foliar spraying with these strains effectively suppressed Bipolaris leaf blotch infection across all three wheat varieties-Kanchan, Shatabdi and BARI gom-27, compared to the untreated control. Additionally, PGPR treatment led to significantly (p = 0.05) higher levels of root and shoot growth compared to untreated plants. The efficacy of the two PGPR strains varied in disease suppression and growth promotion, with B. amyloliquefaciens PPB12 outperforming B. subtilis PPB9. Similarly, among the three wheat varieties, Shatabdi exhibited a more prominent response to PGPR treatment. These findings emphasize the importance of carefully selecting rhizobacterial strains to effectively manage Bipolaris leaf blotch and enhance wheat growth. The study accentuates the significant potential of Bacillus strains and their compatibility with a preferred wheat variety, offering a novel and sustainable alternative for Bipolaris leaf blotch management and wheat cultivation improvement.

Abstract Peronosporomycetes are devastating pathogens to numerous crop, ornamental, and native pl... more Abstract Peronosporomycetes are devastating pathogens to numerous crop, ornamental, and native plants. They are phylogenetically distinct from those of fungi and hence most of the fungicides are ineffective against them. A large body of literature reveals that several bacterial genera such as Pseudomonas, Bacillus, Burkholderia, Lysobacter, Enterobacter, etc. exert antagonistic activities against the peronosporomycete phytopathogens in both in vitro and in vivo conditions. These bacterial strains originated from diverse habitats and ...

Bacteria in Agrobiology: Plant Probiotics, 2012

Comptes Rendus Biologies, 2015

Journal of Oleo Science, 2013

Penicillium simplicissimum GP17-2 is a plant growth-promoting fungus (PGPF) and an inducer of sys... more Penicillium simplicissimum GP17-2 is a plant growth-promoting fungus (PGPF) and an inducer of systemic defense responses. The mechanisms underlying the effect of GP17-2 on the reduction of cucumber leaf damage caused by the anthracnose pathogen Colletotrichum orbiculare were investigated. Cucumber leaves treated with the culture filtrate (CF) of GP17-2 exhibited a clear systemic resistance against subsequent infection with C. orbiculare. The number and size of lesions caused by the disease were reduced in CF-treated plants, in comparison with that in the control plants. The results showed that CF treatment could trigger a set of defense responses, including the production of hydrogen peroxide, formation of lignin, emission of ultra-weak photons, accumulation of salicylic acid, and increase in the transcription of the genes for the defense-related enzymes chitinase and peroxidase. Furthermore, subsequent inoculation of CFpretreated plants with C. orbiculare resulted in higher systemic expression of the genes for chitinase, β-1,3glucanase, and peroxidase relative to nontreated, inoculated plants; this indicated that CF mediates a potentiation state in the plant, enabling it to mount a rapid and effective response on infection by C. orbiculare. Our results indicate that the ability of CF of GP17-2 to stimulate active oxygen species, lignification, SA accumulation, and defense gene activation and potentiation in the host is the possible mode of action of the GP17-2 elicitor and inducer of induced systemic resistance against C. orbiculare infection in cucumber plants.

Plant & cell physiology, 2007

Canadian Journal of Plant Pathology, 2008

Malgré qu'ils aient été négligés dans les études qui ont été consacrées aux champignons favo... more Malgré qu'ils aient été négligés dans les études qui ont été consacrées aux champignons favorisant la croissance des plantes (PGPF) ou à leurs métabolites, les mécanismes par lesquels les microbes bénéfiques non pathogènes médient la résistance systémique induite (RSI), ainsi que les ...