Petruta Mihaela Matei - Profile on Academia.edu (original) (raw)
Papers by Petruta Mihaela Matei
BIO web of conferences, Dec 31, 2022
The production of an organic fertilizer was carried out, from waste generated in the winemaking p... more The production of an organic fertilizer was carried out, from waste generated in the winemaking process of white (Riesling Italian-RI) and red (Cabernet Sauvignon-CS) grapes obtained from the vineyard of Pietroasa (Romania). The potential of the biotransformation process of by-product marc in an open pile in the autumn-winter season was controlled and the thermophilic phase reached average values of 60 ºC at a neutral pH which gives it suitable characteristics to be used as a soil fertiliser. The values of the germination index (GI) of Lepidium sativum L. seeds, using water dilutions from the RI and CS compost marc, demonstrated that there was no degree of phytotoxicity (average GI 144.2% and 139.8%, respectively). The compost marc microflora was represented by bacterial and fungal isolates belonging to genera Rhizopus (10%), Aspergillus (80%), and Penicillium (17%), compared to by-product marc that only present fermentation yeasts. The structure of the microorganism populations in the compost marc dried by lyophilisation showed an almost double number of CFUg -1 compared to the oven-dried compost. The presence of potential antagonistic microorganisms and the high number of CFUg -1 , demonstrated that this compost can have a suppressive effect on soil pathogens in addition to its quality as a fertilizer.
Research concerning the behaviour of some new table grape cultivars in Huşi Vineyard
Lucrări Ştiinţifice - Universitatea de Ştiinţe Agronomice şi Medicină Veterinară Bucureşti. Seria B, Horticultură, 2009
The behavior of three Cabernet Sauvignon clones in Valea Călugărească area
Scientific Papers - Series B, Horticulture, 2018
Evaluation of the potential risks of sewage sludge compost on the soil-plants system
Obtaining of an active product based on yeast biomass by fermentation of a waste from winemaking process from Oprisor area
Progress of Cryogenics and Isotopes Separation, 2017
Thermal death kinetics in dry air of Diplodia seriata fungus inoculated in vitro in pruned vine shoots
European Journal of Plant Pathology, 2016
The upsurge in fungal diseases that cause grapevine wood rot in young and adult plants remains a ... more The upsurge in fungal diseases that cause grapevine wood rot in young and adult plants remains a major concern for the wine sector. Since pruned vine shoots act as a reservoir of these fungi, there is a need for sanitization methods that can prevent their spread, avoiding plant reinfection. In this work, the effectiveness of dry heat treatments for the disinfection of pruning waste has been investigated. The thermal death of two inocula of Diplodia seriata fungus, associated to black dead arm disease, was studied in vitro at four different temperatures (40, 50, 60 and 65 °C) for different time periods (20, 40, 60, 90, 120 and 150 min) in a dry air incubator. Obtained data confirmed that inhibition increased as a function of temperature and exposure time. First-order and Weibull models were compared to describe D. seriata fungus survival curve kinetics, with high R2 values (0.923 and 0.930, respectively) and high significances (p < 0.001). Both models predict that the time required to reach 99 % mortality at 65 °C would be 143 min, slightly higher than the experimentally determined minimum time of 120 min. The thermal death kinetics data reported herein has direct applications in process design and validation studies of other grapevine-pruning-waste sanitization methodologies.
Eco ‐Friendly Nanocomposites of Chitosan with Natural Extracts, Antimicrobial Agents, and Nanometals
Handbook of Composites from Renewable Materials
Correlaciones entre parámetros de composición de la uva y niveles peciolares de nutrientes
Effect of hydrogen cyanamide (Dormex) on bud break, yield and quality of Thompson Seedless grapes under the Egyptian Nile Delta conditions
Research concerning the influence of climate change on grapevine
During the last years there have been recorded very hot periods during the summer, deficits of pr... more During the last years there have been recorded very hot periods during the summer, deficits of precipitations, a more reduced growth of the berries, an acceleration of the phenological stages, the harvesting of the grapes being proceeded with up to two weeks. Also, there have been recorded increased accumulations of sugars in the grapes outrunning with 30 g/l the values obtained during normal years. The year 2007, the hottest in the last decade, with a pronounced deficit of precipitations from the interval May-August determined a predominance of a productive activity and high content of sugar (224.1 g/l in Guyot on demi-high trunk, 216.2 g/l in Cazenave cordon and 202.7 g/l in spur-pruned cordon). Pursuant to these changes there have also been recorded differentiated distributions of the dry matter between the various organs of the vines. The climate warming accentuated in the last years has influences positively the quality of grapes allowing the acquirement of high quality wines.
Effects of climate change on dry matter accumulation and partitioning at grapevine
Agronomy
Fusarium culmorum is a soil-borne fungus able to cause Fusarium head blight, one of the most impo... more Fusarium culmorum is a soil-borne fungus able to cause Fusarium head blight, one of the most important cereal diseases worldwide, which can result in significant yield losses of up to 50% and which jeopardizes food and feed safety due to the mycotoxins produced. In the study presented herein, the enhancement of the antifungal activity against this pathogen, resulting from the addition of silver nanoparticles (AgNPs) to different polyphenol-stevioside inclusion compounds, dispersed either in a chitosan oligomers hydroalcoholic solution or in a choline chloride:urea:glycerol deep eutectic solvent, was investigated in vitro. The polyphenols assayed were curcumin, ferulic acid, gallic acid and silymarin. Four composite concentrations (62.5, 125, 250 and 500 µg·mL−1), with and without AgNPs, were assessed, finding noticeable differences in mycelial growth inhibition, with EC50 and EC90 values ranging from 118 to 579 µg·mL−1 and from 333 to 2604 µg·mL−1, respectively. The obtained results...
AgriEngineering
Phytophthora cinnamomi is responsible for radical rot in a wide range of hosts, resulting in larg... more Phytophthora cinnamomi is responsible for radical rot in a wide range of hosts, resulting in large economic and ecological losses worldwide. In Spain, it is responsible for diseases such as the oak decline or the chestnut blight. In this study, different polyphenol-stevioside inclusion compounds dispersed in a hydroalcoholic solution of chitosan oligomers have been investigated, with a view to their application as natural bioactive complexes to replace conventional systemic fungicides against this fungus. The polyphenols tested in vitro were curcumin, ferulic acid, gallic acid and silymarin. Three concentrations (125, 250 and 500 µg·mL−1) were assayed, with and without silver nanoparticles (AgNPs), and notable differences were found in the inhibition of mycelium growth, with EC50 and EC90 values ranging from 171 to 373.6 µg·mL−1, and from 446.2 to 963.7 µg·mL−1, respectively. The results obtained showed that the addition of AgNPs, despite their antimicrobial activity, did not always...
Congreso Ibérico de Agroingeniería
Congreso Ibérico de Agroingeniería
The upsurge in fungal diseases that cause grapevine wood rot in young and adult plants remains a ... more The upsurge in fungal diseases that cause grapevine wood rot in young and adult plants remains a major concern for the wine sector. So as to study the effectiveness of heat treatments for the sanitization of pruning waste, the thermal death of two inocula of Diplodia seriata fungus-associated to black dead arm disease-was studied in vitro at different temperatures in a dry air incubator, confirming that inhibition increased as a function of temperature and exposure time. First-order and Weibull models were compared to describe D. seriata fungus survival curve kinetics, with high R 2 values (0.923 and 0.930, respectively) and high significances (p<0.001) for both models. According to the first-order model, the time required to reach 100% mortality at 65 °C was 120 min (or 93 min to 95%), whereas for the Weibull model a 90% reduction was attained after 73 min.
Antibiotics (Basel, Switzerland), Jan 16, 2018
Phytophthora cinnamomi, responsible for "root rot" or "dieback" plant disease, causes a significa... more Phytophthora cinnamomi, responsible for "root rot" or "dieback" plant disease, causes a significant amount of economic and environmental impact. In this work, the fungicide action of nanocomposites based on silver nanoparticles and polyphenol inclusion compounds, which feature enhanced bioavailability and water solubility, was assayed for the control of this soil-borne water mold. Inclusion compounds were prepared by an aqueous two-phase system separation method through extraction, either in an hydroalcoholic solution with chitosan oligomers (COS) or in a choline chloride:urea:glycerol deep eutectic solvent (DES). The new inclusion compounds were synthesized from stevioside and various polyphenols (gallic acid, silymarin, ferulic acid and curcumin), in a [6:1] ratio in the COS medium and in a [3:1] ratio in the DES medium, respectively. Their in vitro response against Phytophthora cinnamomi isolate MYC43 (at concentrations of 125, 250 and 500 µg•mL -1 ) was tested, which found a significant mycelial growth inhibition, particularly high for the composites prepared using DES. Therefore, these nanocomposites hold promise as an alternative to fosetyl-Al and metalaxyl conventional systemic fungicides.
“Agriculture for Life, Life for Agriculture” Conference Proceedings
Broad scale use of chemical pesticides is known to have produced broad scale environmental impact... more Broad scale use of chemical pesticides is known to have produced broad scale environmental impact worldwide and, at the same time, discovery and registration of new molecules to be used as insecticides, herbicides and fungicides have slowed significantly along the last decades, reducing the number of options for pest control by the farmers. Searches for novel environmentally friendly products are a recognized priority. In this work, aqueous solutions of chitosan oligomers (COs) and propolis (P), individually or as binary mixtures, were tested against Hemileia vastatrix, the fungus which causes coffee leaf rust, the worst disease of coffee. Germination of H. vastatrix was inhibited up toll 99 % by COs, followed by the mixture of COs-P and P individually (germination inhibition of 96 % and 54 % respectively). Testing those products on detached coffee leaf discs also produced promising results when COs were applied before H. vastatrix inoculation. These results may lead to the discover...
Waste management (New York, N.Y.), Jan 10, 2016
After the ban on sodium arsenite, waste management alternatives to the prevalent burning method, ... more After the ban on sodium arsenite, waste management alternatives to the prevalent burning method, such as the hygienization and biodegradation in solid phase by composting, are required for the pruned material from grapevines affected by various fungi. In this work the dynamics of a fungus associated with vine decay (Diplodia seriata) during the composting process of a mixture of laying hen manure and vine pruning waste (2:1w/w) have been investigated in an open pile and a discontinuous closed biodigester. Through the optimization of the various physical-chemical parameters, hygienization of the infected waste materials was attained, yielding class-A organo-mineral fertilizers. Nevertheless, important differences in the efficiency of each system were observed: whereas in the open pile it took 10days to control D. seriata and 35 additional composting days to achieve full inactivation, in the discontinuous biodigester the fungus was entirely inactivated within the first 3-7days. Finall...
Vitis
Vitis -Geilweilerhof-
BIO web of conferences, Dec 31, 2022
The production of an organic fertilizer was carried out, from waste generated in the winemaking p... more The production of an organic fertilizer was carried out, from waste generated in the winemaking process of white (Riesling Italian-RI) and red (Cabernet Sauvignon-CS) grapes obtained from the vineyard of Pietroasa (Romania). The potential of the biotransformation process of by-product marc in an open pile in the autumn-winter season was controlled and the thermophilic phase reached average values of 60 ºC at a neutral pH which gives it suitable characteristics to be used as a soil fertiliser. The values of the germination index (GI) of Lepidium sativum L. seeds, using water dilutions from the RI and CS compost marc, demonstrated that there was no degree of phytotoxicity (average GI 144.2% and 139.8%, respectively). The compost marc microflora was represented by bacterial and fungal isolates belonging to genera Rhizopus (10%), Aspergillus (80%), and Penicillium (17%), compared to by-product marc that only present fermentation yeasts. The structure of the microorganism populations in the compost marc dried by lyophilisation showed an almost double number of CFUg -1 compared to the oven-dried compost. The presence of potential antagonistic microorganisms and the high number of CFUg -1 , demonstrated that this compost can have a suppressive effect on soil pathogens in addition to its quality as a fertilizer.
Research concerning the behaviour of some new table grape cultivars in Huşi Vineyard
Lucrări Ştiinţifice - Universitatea de Ştiinţe Agronomice şi Medicină Veterinară Bucureşti. Seria B, Horticultură, 2009
The behavior of three Cabernet Sauvignon clones in Valea Călugărească area
Scientific Papers - Series B, Horticulture, 2018
Evaluation of the potential risks of sewage sludge compost on the soil-plants system
Obtaining of an active product based on yeast biomass by fermentation of a waste from winemaking process from Oprisor area
Progress of Cryogenics and Isotopes Separation, 2017
Thermal death kinetics in dry air of Diplodia seriata fungus inoculated in vitro in pruned vine shoots
European Journal of Plant Pathology, 2016
The upsurge in fungal diseases that cause grapevine wood rot in young and adult plants remains a ... more The upsurge in fungal diseases that cause grapevine wood rot in young and adult plants remains a major concern for the wine sector. Since pruned vine shoots act as a reservoir of these fungi, there is a need for sanitization methods that can prevent their spread, avoiding plant reinfection. In this work, the effectiveness of dry heat treatments for the disinfection of pruning waste has been investigated. The thermal death of two inocula of Diplodia seriata fungus, associated to black dead arm disease, was studied in vitro at four different temperatures (40, 50, 60 and 65 °C) for different time periods (20, 40, 60, 90, 120 and 150 min) in a dry air incubator. Obtained data confirmed that inhibition increased as a function of temperature and exposure time. First-order and Weibull models were compared to describe D. seriata fungus survival curve kinetics, with high R2 values (0.923 and 0.930, respectively) and high significances (p < 0.001). Both models predict that the time required to reach 99 % mortality at 65 °C would be 143 min, slightly higher than the experimentally determined minimum time of 120 min. The thermal death kinetics data reported herein has direct applications in process design and validation studies of other grapevine-pruning-waste sanitization methodologies.
Eco ‐Friendly Nanocomposites of Chitosan with Natural Extracts, Antimicrobial Agents, and Nanometals
Handbook of Composites from Renewable Materials
Correlaciones entre parámetros de composición de la uva y niveles peciolares de nutrientes
Effect of hydrogen cyanamide (Dormex) on bud break, yield and quality of Thompson Seedless grapes under the Egyptian Nile Delta conditions
Research concerning the influence of climate change on grapevine
During the last years there have been recorded very hot periods during the summer, deficits of pr... more During the last years there have been recorded very hot periods during the summer, deficits of precipitations, a more reduced growth of the berries, an acceleration of the phenological stages, the harvesting of the grapes being proceeded with up to two weeks. Also, there have been recorded increased accumulations of sugars in the grapes outrunning with 30 g/l the values obtained during normal years. The year 2007, the hottest in the last decade, with a pronounced deficit of precipitations from the interval May-August determined a predominance of a productive activity and high content of sugar (224.1 g/l in Guyot on demi-high trunk, 216.2 g/l in Cazenave cordon and 202.7 g/l in spur-pruned cordon). Pursuant to these changes there have also been recorded differentiated distributions of the dry matter between the various organs of the vines. The climate warming accentuated in the last years has influences positively the quality of grapes allowing the acquirement of high quality wines.
Effects of climate change on dry matter accumulation and partitioning at grapevine
Agronomy
Fusarium culmorum is a soil-borne fungus able to cause Fusarium head blight, one of the most impo... more Fusarium culmorum is a soil-borne fungus able to cause Fusarium head blight, one of the most important cereal diseases worldwide, which can result in significant yield losses of up to 50% and which jeopardizes food and feed safety due to the mycotoxins produced. In the study presented herein, the enhancement of the antifungal activity against this pathogen, resulting from the addition of silver nanoparticles (AgNPs) to different polyphenol-stevioside inclusion compounds, dispersed either in a chitosan oligomers hydroalcoholic solution or in a choline chloride:urea:glycerol deep eutectic solvent, was investigated in vitro. The polyphenols assayed were curcumin, ferulic acid, gallic acid and silymarin. Four composite concentrations (62.5, 125, 250 and 500 µg·mL−1), with and without AgNPs, were assessed, finding noticeable differences in mycelial growth inhibition, with EC50 and EC90 values ranging from 118 to 579 µg·mL−1 and from 333 to 2604 µg·mL−1, respectively. The obtained results...
AgriEngineering
Phytophthora cinnamomi is responsible for radical rot in a wide range of hosts, resulting in larg... more Phytophthora cinnamomi is responsible for radical rot in a wide range of hosts, resulting in large economic and ecological losses worldwide. In Spain, it is responsible for diseases such as the oak decline or the chestnut blight. In this study, different polyphenol-stevioside inclusion compounds dispersed in a hydroalcoholic solution of chitosan oligomers have been investigated, with a view to their application as natural bioactive complexes to replace conventional systemic fungicides against this fungus. The polyphenols tested in vitro were curcumin, ferulic acid, gallic acid and silymarin. Three concentrations (125, 250 and 500 µg·mL−1) were assayed, with and without silver nanoparticles (AgNPs), and notable differences were found in the inhibition of mycelium growth, with EC50 and EC90 values ranging from 171 to 373.6 µg·mL−1, and from 446.2 to 963.7 µg·mL−1, respectively. The results obtained showed that the addition of AgNPs, despite their antimicrobial activity, did not always...
Congreso Ibérico de Agroingeniería
Congreso Ibérico de Agroingeniería
The upsurge in fungal diseases that cause grapevine wood rot in young and adult plants remains a ... more The upsurge in fungal diseases that cause grapevine wood rot in young and adult plants remains a major concern for the wine sector. So as to study the effectiveness of heat treatments for the sanitization of pruning waste, the thermal death of two inocula of Diplodia seriata fungus-associated to black dead arm disease-was studied in vitro at different temperatures in a dry air incubator, confirming that inhibition increased as a function of temperature and exposure time. First-order and Weibull models were compared to describe D. seriata fungus survival curve kinetics, with high R 2 values (0.923 and 0.930, respectively) and high significances (p<0.001) for both models. According to the first-order model, the time required to reach 100% mortality at 65 °C was 120 min (or 93 min to 95%), whereas for the Weibull model a 90% reduction was attained after 73 min.
Antibiotics (Basel, Switzerland), Jan 16, 2018
Phytophthora cinnamomi, responsible for "root rot" or "dieback" plant disease, causes a significa... more Phytophthora cinnamomi, responsible for "root rot" or "dieback" plant disease, causes a significant amount of economic and environmental impact. In this work, the fungicide action of nanocomposites based on silver nanoparticles and polyphenol inclusion compounds, which feature enhanced bioavailability and water solubility, was assayed for the control of this soil-borne water mold. Inclusion compounds were prepared by an aqueous two-phase system separation method through extraction, either in an hydroalcoholic solution with chitosan oligomers (COS) or in a choline chloride:urea:glycerol deep eutectic solvent (DES). The new inclusion compounds were synthesized from stevioside and various polyphenols (gallic acid, silymarin, ferulic acid and curcumin), in a [6:1] ratio in the COS medium and in a [3:1] ratio in the DES medium, respectively. Their in vitro response against Phytophthora cinnamomi isolate MYC43 (at concentrations of 125, 250 and 500 µg•mL -1 ) was tested, which found a significant mycelial growth inhibition, particularly high for the composites prepared using DES. Therefore, these nanocomposites hold promise as an alternative to fosetyl-Al and metalaxyl conventional systemic fungicides.
“Agriculture for Life, Life for Agriculture” Conference Proceedings
Broad scale use of chemical pesticides is known to have produced broad scale environmental impact... more Broad scale use of chemical pesticides is known to have produced broad scale environmental impact worldwide and, at the same time, discovery and registration of new molecules to be used as insecticides, herbicides and fungicides have slowed significantly along the last decades, reducing the number of options for pest control by the farmers. Searches for novel environmentally friendly products are a recognized priority. In this work, aqueous solutions of chitosan oligomers (COs) and propolis (P), individually or as binary mixtures, were tested against Hemileia vastatrix, the fungus which causes coffee leaf rust, the worst disease of coffee. Germination of H. vastatrix was inhibited up toll 99 % by COs, followed by the mixture of COs-P and P individually (germination inhibition of 96 % and 54 % respectively). Testing those products on detached coffee leaf discs also produced promising results when COs were applied before H. vastatrix inoculation. These results may lead to the discover...
Waste management (New York, N.Y.), Jan 10, 2016
After the ban on sodium arsenite, waste management alternatives to the prevalent burning method, ... more After the ban on sodium arsenite, waste management alternatives to the prevalent burning method, such as the hygienization and biodegradation in solid phase by composting, are required for the pruned material from grapevines affected by various fungi. In this work the dynamics of a fungus associated with vine decay (Diplodia seriata) during the composting process of a mixture of laying hen manure and vine pruning waste (2:1w/w) have been investigated in an open pile and a discontinuous closed biodigester. Through the optimization of the various physical-chemical parameters, hygienization of the infected waste materials was attained, yielding class-A organo-mineral fertilizers. Nevertheless, important differences in the efficiency of each system were observed: whereas in the open pile it took 10days to control D. seriata and 35 additional composting days to achieve full inactivation, in the discontinuous biodigester the fungus was entirely inactivated within the first 3-7days. Finall...
Vitis
Vitis -Geilweilerhof-