The role of soil microbes

Ebook "Use of microbes for the alleviation of soil stresses, Volume 1" describes the most important details and advances related to the alleviation of soil stresses by soil microbes. Comprised of seven chapters, the book reviews the mechanisms by which plant growth promoting rhizobacteria (PGPR) alleviate plant growth under stress; the role of mycorrhizal fungi on the alleviation of drought stress in host plants; how PGPR may alleviate salinity stress on the growth of host plants; and the role of PGPR on the growth of the host plant under the stress of sub optimal root zone temperature.

166p manmanthanhla0201 26-02-2024 3 1   Download

Ebook "Molecular mechanisms of plant and microbe coexistence (Soil biology, Volume 15)" presents studies on the complex and manifold interactions of plants and microbes at the population, genomics and proteomics level. The role of soil microbial diversity in enhancing plant health and plant microbe beneficial symbioses is discussed. Microbial communities are shown in the light of evolution.

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Streptomyces are considered the most potential microbes with the ability to produce antimicrobial and anticancer agents. These bacteria are found mostly in soil across the globe and play a pivotal role in material recycling processes. Isolation of Streptomyces in Vietnam has been conducted for years.

8p vimulcahy 18-09-2023 3 3   Download

Interaction between soil microbes and minerals play a major role in environmental cycling processes, which leads to the mobilization of nutrients from soil components into available forms for biological uptake which enhances crop growth and yield. In the present study four (4) potassium solubilizing bacteria (KSB), eight (8) zinc solubilizing bacteria (ZnSB) and two (2) zinc solubilizing fungi (ZnSF) isolated from Rice, Maize, Cotton and Sorghum rhizosphere soil collected from Student and College farm Rajendranagar PJTSAU Hyderabad.

11p nguathienthan8 20-10-2020 16 1   Download

Neonicotinoid insecticides are widely used nowadays to control many sucking insect-pests in several horticultural crops. They are neurotoxic and systemic in nature and their indiscriminate use may affect both target as well as beneficial insects. They are persistent insecticides and can enter food chain through soil application because of high water solubility. Microbes play an important role in removing toxic insecticides from soil environment and microbial degradation can be considered to be a cost effective mechanism to detoxify the insecticides.

23p kethamoi7 26-08-2020 16 2   Download

It is likely to provide plants with their necessary nutrients using chemical and biological fertilization. Although chemical fertilization is a quick method, it is not recommendable economically and environmentally, especially if overused. Biological fertilization is the use of soil microbes including arbuscular mycorrhizal fungi and plant growth promoting rhizobacteria to inoculate plants. It has been proved that biological fertilization is an efficient method to supply plants with their necessary nutrients.

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Bio-fertilizer is a substance used to increase the fertility of the soil. It contains microorganisms which helps the soil to gain its nutrient back and make the soil available for cultivation. Bio-fertilizer doesn’t make any kind of pollution, so it is not a threat to use them in the place of the chemical fertilizers which causes a lot of pollution to the environment. Current soil management strategies are mainly dependent on inorganic chemical-based fertilizers, which caused a serious threat to human health and environment.

7p angicungduoc5 14-06-2020 18 0   Download

Role of vermicompost in nourishing agricultural crops has attracted the attention of researchers throughout the globe in past few decades. Vermicompost is the method of using earthworms to transform organic waste into nutrient rich compost. The earthworms’ casting is nutritive organic manure rich in humus, NPK, micronutrients, beneficial microbes, antibiotics, enzymes, growth hormones, etc. There are many reports in literature showing beneficial effects of imbedding vermicompost in soil.

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A field experiment was conducted during Kharif season of 2016-17, at the farmer’s fields in village Munshikhera, district Unnao to study the efficacy of halophilic bio fertilizers, Halo Azotobacter (Halo-Azo) and Halo Phosphate Solubilising Bacteria (Halo-PSB) on the growth and productivity of salt tolerant variety of paddy (CSR-36) and residual fertility of post-harvest soil. It is observed that potential salt tolerant variety of paddy in association with halophilic beneficial microbes together can play a greater role to improve the productivity of paddy as well as soil fertility.

6p trinhthamhodang1213 30-05-2020 7 0   Download

Soil has enormous potential antagonistic mechanism, which have positive influence on plant growth and health. Among the microbes, Bacillus subtilis an endospore forming, gram positive bacteria, plays a major role in biocontrol and PGPR activities. Among the different mechanisms of biocontrol, Induced systemic resistance is the one which induces the resistance by activating the defence related enzymes and increasing the growth parameters.

12p trinhthamhodang5 16-05-2020 8 0   Download

The role of microorganisms does not just start with nutrient mineralization, organic matter decomposition and ends with it. There is much more a particular microbe can do in soil and its ecosystem. One of such is Trichoderma, a fungus found in almost all soil ecosystem and a varied environment conditions covering normal soil to harsh conditions as marshy land, desert soil and other degraded environment.

9p nguaconbaynhay5 11-05-2020 12 1   Download

Abiotic stresses are major constrains which adversely affect the plant growth and productivity. Among all abiotic stresses, drought is considered as one of the major constraints on agricultural productivity worldwide and is likely to further increase. Hence the need of the hour is to formulate the strategies that can minimize the loss in crop production under drought conditions. One of them being the exploitation of soil microbes which have the capacity to overcome the adverse effects of drought stress.

11p angicungduoc4 26-04-2020 14 1   Download

Phosphorus (P) is limiting for crop yield on > 30% of the world's arable land and, by some estimates, world resources of inexpensive phosphorus may be depleted by 2050 (Vance et al., 2003). It is the second important key plant nutrient after nitrogen. An adequate supply of phosphorus is therefore required for proper functioning and various metabolisms of plants. Majority of phosphorus in soils is fixed and hence, plant available phosphorus is scarcely available despite the abundance of both inorganic and organic phosphorus forms in soils.

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Microorganisms play important roles in the recycling of agricultural wastes. Composting is the degradation of organic materials through the activities of diverse microorganisms. The compost generated by bioconversion of agro-residues offers several benefits such as enhanced soil fertility and soil health which can lead to increased agricultural productivity, improved soil biodiversity, reduced ecological risks and a healthier environment. This investigation examined the microbial community dynamics, loads and identification of microbiota at various stages of composting process.

11p chauchaungayxua3 07-02-2020 20 1   Download

Agricultural production is mainly depends on the health of soil, which is a measure of a complex set of biological, chemical and physical interactions driven by microorganisms. Effective microorganism increases the beneficial microbial population in the soil for sustainable crop production. Effective Microorganisms are mixed cultures of beneficial naturally-occurring organisms that can be applied as inoculants to increase the microbial diversity of soil ecosystem. They consist mainly of the photosynthesizing bacteria, lactic acid bacteria, yeasts, actinomycetes and fermenting fungi.

10p kequaidan2 11-12-2019 24 0   Download

Microbes play crucial role in bioremediation of hydrocarbon contaminated soil and solid waste. In this study, poly-aromatic hydrocarbons resistant fungi were isolated from soil samples of different areas including Delhi-NCR and Meerut city (Uttar Pradesh), the bioremediation of hydrocarbons like naphthalene and pyrene by these isolates were characterized to evaluate their applicability for polyaromatic hydrocarbon remediation from contaminated soil. The optimum pH and temperature conditions for growth and hydrocarbon degradation were determined for isolates.

9p cothumenhmong1 08-12-2019 26 2   Download

Though alternative methods of controlling insects, rodents, insect pests, pathogens, microbes and weeds have been developed, pesticides could not be replaced. The prosperous role of pesticides in the management of insect pests and diseases is indisputable. However, its nature of non selective toxicity towards other organisms and deposition in the environment warrants the legislation of usage. Pesticide use raises a number of environmental concerns.

232p conquynho32 18-09-2012 87 15   Download