Bharathiar University

About: Bharathiar University is a education organization based out in Coimbatore, Tamil Nadu, India. It is known for research contribution in the topics: Thin film & Adsorption. The organization has 5812 authors who have published 8628 publications receiving 143934 citations. The organization is also known as: BU.

Plant growth promoting rhizobacteria (PGPR): A potential alternative tool for nematodes bio-control

Abstract: The increasing demand of the agricultural produce can be attained by optimizing the productivity potential and by minimizing the losses caused by notorious plant-parasitic nematode of the crops. Chemical based nematode control is an effective strategy to combat this biotic stress, but inappropriate and inadequate application of synthetic pesticides has exerted an adverse effect on bio-flora, fauna and natural enemies. Due to the environmental and regulatory pressure, use of potential biocontrol agents is the most welcomed way for nematode management by the farming community. There is an emerging market for Plant growth promoting rhizobacteria (PGPR) mediated eco-friendly biopesticides for plant-parasitic nematode biocontrol. Moreover, PGPR strains can enhance the plant growth through the production of various plant growth promoting substances. Based on the fact stated above, the present review focused on PGPR based nematodes biocontrol strategies, the direct and indirect mechanism of PGPR for nematode biocontrol and future prospect of PGPR based biocontrol agents against nematodes are discussed.

Response of neem (Azadirachta indica A. Juss) to indigenous arbuscular mycorrhizal fungi, phosphate-solubilizing and asymbiotic nitrogen-fixing bacteria under tropical nursery conditions

Abstract: Neem (Azadirachta indica A. Juss) seedlings were inoculated with arbuscular mycorrhizal (AM) fungi, Glomus intraradices Schenck and Smith and G. geosporum (Nicol. and Gerd.) Walker, Azospirillum brasilense, and phosphate-solubilizing bacteria (PSB) individually or in various combinations in unsterile soil under nursery conditions. Seedlings were harvested at 60 and 120 days after transplantation. Microbial inoculation resulted in increased mycorrhizal colonization, greater plant height, leaf area and number, root collar diameter, biomass, phosphorus, nitrogen and potassium content, and seedling quality. Inoculated seedlings also had low root/shoot ratios and low nutrient utilization efficiencies. Populations of PSB declined with seedling growth; contrarily populations of A. brasilense increased. A. brasilense and PSB populations were related to each other and influenced root colonization by AM fungi. Microbial inoculation effects were greatest when seedlings were inoculated with a combination of microbes rather than individually. This clearly indicates that these microorganisms act synergistically when inoculated simultaneously, with maximum response being when both AM fungi were coinoculated with A. brasilense and PSB. The results emphasize the importance of microbial inoculations for the production of robust, rapidly growing seedlings in nurseries and illustrate the advantage of inoculating soils of a low microbial population with indigenous microbes.