Mona S. Zayed | Ain Shams University (original) (raw)

Papers by Mona S. Zayed

Plant-Microbe Interactions in Agro-Ecological Perspectives, 2017

Microbial interactions in soil are considered as one of the most important activities that occur ... more Microbial interactions in soil are considered as one of the most important activities that occur in the terrestrial ecosystem. They affect all the dynamic processes of plants and other living organisms that live near from them either directly or indirectly. There are two types of microbial interaction that occur in soil. The interactions that occur between individuals within the same species are called intraspecific interaction, and those that occur between organisms of different species either two microbial populations or microbial population and plants or animals are called interspecific interactions. Each microorganism could perform more than one type of interaction depending on the sounding environmental conditions, its partner in the interaction. Microbial interactions are very essential for plant growth and health.

In a trial to isolation and identification ectomycorrhizal fungi for the first time from Egypt, 1... more In a trial to isolation and identification ectomycorrhizal fungi for the first time from Egypt, 13 sporocarpes associated with different plants grown on Egyptian soils were collected. The isolates tested for ectomycorrhizal formation twice the first; using the paper sandwich technique with Bauhinia sp. and typical ectomycorrhizal roots were obtained after 7 days from inoculation within most of collected isolates and the second, with Pinus sp. to ensure their identity by the colonization characteristics on this host. A comparison between the growth patterns of seven ectomycorrhizal fungi grown in MMN liquid medium under static, magnetic and shaking conditions during have been made. Growth curve of ECM strains, their ability to utilize various carbon and nitrogen sources were tested. A pot experiment was conducted to evaluate the effectiveness and infectiveness of seven ECM isolates on some seedlings.

International Journal of Recycling of Organic Waste in Agriculture, 2020

Purpose The effect of using compost and vermicompost or their teas on the growth and biochemical ... more Purpose The effect of using compost and vermicompost or their teas on the growth and biochemical profile of Salvia officinalis cultivated in sand soil were assessed. Methods Plants were subjected to different treatments of compost, vermicompost and their teas. The growth of common sage, Salvia officinalis was monitored as shoot fresh and dry weights (g/plant) and their oil, N, P, and K contents. Results Among the four tested treatments of vermicompost, the treatment no. 1 (prepared from rice straw supplemented by Trichoderma harzianum and Phanerochaete chrysosporium + Cattle dung + Rock phosphate + Feldspar “12 % K2O”), showed the maximal values of shoot fresh and dry weights, oil, N, P, and K %, being in the first cut 820, 200 g/plant, 1.42, 2.80, 1.40 and 1.98 in respective order. The corresponding values in the second cut were 1152, 277 g/plant, 1.55, 3.56, 1.68 and 2.29%, respectively. Also, the maximal values of all previous parameters were recorded in the vermicompost tea trea...

Microorganisms for Sustainability, 2017

Sustainable agriculture development is a very important challenge that encounters the world nowad... more Sustainable agriculture development is a very important challenge that encounters the world nowadays as it requires increasing the productivity of plants with minimal disturbance of the environment. Plant growth is very susceptible to different conditions that affect its productivity and yield. These conditions could be divided into biotic (living) and abiotic (nonliving) stresses. Biotic stress includes interference from pathogenic microorganisms, insects, and higher animals, which include humans, while abiotic stress includes soil salinity, waterlogging, drought, high and low temperatures, wind, intense light, heavy metals, and inadequate or excessive mineral nutrients. Most of the abiotic stress factors could be attributed to different climatic changes which are considered the major reasons for regression of principal crop productivity. Plant species are surrounded by diverse beneficial microorganisms that dominate in their rhizosphere and have the ability to stimulate plant growth and protect them against different stress conditions. Different microbial activities have the ability to improve plant tolerance to biotic and abiotic stress conditions. The role of alleviation depends on the plant genus, the stress type, the microbial species, and the type of relationship between microorganisms and the plant. Microorganisms could enhance plant survival, growth, performance, and yield by several functions such as stimulating root growth by production of phytohormones, enabling water uptake to roots by production of polysaccharides in the root hair zone, improving plant nutrition by increasing nutrients through solubilization of phosphate, secreting siderophores for iron, and fixing dinitrogen, which is either associative or nonassociative. Using microbial inoculants is considered an important task in the next decades to counter abiotic stress in different regions.

The Journal of Agricultural Science, 2020

The supplementation of ruminant diets with exogenous cellulolytic enzymes can improve their diges... more The supplementation of ruminant diets with exogenous cellulolytic enzymes can improve their digestibility and feeding value. The objective of this study was to determine the effect of supplementing roughage (rice straw) and concentrate with inoculants containing four fungal strains (Pleurotus ostreatus, Phanerochaete chrysosporium, Trichoderma reesei and Trichoderma viride) and four bacterial strains (Paenibacillus polymyxa, Bacillus megaterium, Bacillus circulans and Bacillus subtilis), given separately or as a mixture, as a source of exogenous cellulolytic enzymes, on basic rumen parameters in vitro, including digestibility and methane production. A batch culture trial was used to select the best supplements, and a long-term rumen simulation technique (RUSITEC) was used to evaluate the effects of P. chrysosporium, B. subtilis, and a 1 : 1 mixture of these two on dietary component digestibility and fermentation parameters. In the batch culture evaluation, there were significant inc...

Egyptian Journal of Microbiology, 2020

Arab Universities Journal of Agricultural Sciences, 2018

Arab Universities Journal of Agricultural Sciences, 2019

International Journal of Recycling of Organic Waste in Agriculture, 2018

African Journal of Plant Science, 2017

Microbial Inoculants in Sustainable Agricultural Productivity, 2016

The increasing need for environmentally friendly agricultural applications is motivating the use ... more The increasing need for environmentally friendly agricultural applications is motivating the use of fertilizers based on beneficial microorganisms called biofertilizers. These biofertilizers could be defined as formulations containing one or more beneficial and efficient microbial strains (or species) loaded on economically safe and easy-to-use carrier material. Productions of biofertilizers require integration of physical, chemical, and biological parameters to increase the populations and survival of these microorganisms. The most common biofertilizers are nitrogen fixers; phosphate solubilizers; potassium mobilizers; sulfur oxidizers; Pseudomonas fluorescens, which is known as the most common plant-growth-promoting rhizobacteria (PGPR); and mycorrhizae. Productions of efficient biofertilizers require selection of good microbial strain(s), selection of good carrier, and using a suitable formulation process. Selected strains must be effective and competitive against soil indigenous populations. Good carriers must be characterized by their ability to deliver the right number of viable cells in good physiological condition and at the right time. The formulation process refers to the laboratory or industrial process for unifying the carrier with the bacterial strain. There are different formulation technologies that were utilized during the last decades at which four basic dispersal types from microbial inoculant were produced (powder, granule, slurry, and liquid). High-quality microbial inoculants should meet farmers’ and manufacturers’ requirements, which include the following: contains large population of one or several strains; has consistent and reproducible efficacy under different field conditions; free from significant contamination and opportunistic pathogens for humans, animals, and plants; has an extended shelf life and resistance to mishandling by the farmers.

Annals of Agricultural Sciences, 2015

Annals of Agricultural Sciences, 2012

Jojoba or Hohoba (Simmondsia chinensis (Link) Schneider) is an economically important plant in ar... more Jojoba or Hohoba (Simmondsia chinensis (Link) Schneider) is an economically important plant in arid and semi-arid areas. Micropropagation is a highly recommended strategy for obtaining Jojoba elite clones. The present investigation aimed to study the effect of explant type and sequential subcultures on the in vitro multiple shoots formation of Jojoba. Four explants form female mature plants were used for the in vitro establishment of Jojoba; shoot tips and terminal, sub-terminal and basal stem node segments. It was found that Murashige and Skoog (MS) medium supplemented with 6-benzylaminopurine (BA) at 1.25 mg/l could be a promising treatment for the in vitro establishment of all explant types. On the other hand, BA at 2 mg/l is the most promising concentration for shoot multiplication, which gave higher values of mean number of axillary shoots during all successive subcultures than the other treatments. It was also found that the mean number of axillary shoots increased till the 4 ...