Bacterial Endophytes: Potential Role in Plant Growth Promotion
Yashaswini, M.S.*
Dept. of Agricultural Microbiology, University of Agricultural Sciences, GKVK, Bangalore, Karnataka (560 065), India
Nysanth, N.S.
Dept. of Agricultural Microbiology, University of Agricultural Sciences, GKVK, Bangalore, Karnataka (560 065), India
Anith, K.N.
Dept. of Agricultural Microbiology, College of Agriculture, Vellayani, Thiruvananthapuram, Kerala Agricultural University, Kerala (695 522), India
DOI: NIL
Keywords: Biocontrol, Endophytic bacteria, Phytoremediation, Plant growth promotion
Abstract
Endophytic bacteria belong to the group of microorganisms that complete their life cycle partly or entirely within a host plant without causing any apparent disease symptoms in the host. They are ubiquitously associated, either obligately or facultatively, with almost all plant parts and plant species, and this could be either beneficial or neutral effect on plants. In beneficial symbiotic associations, they enhance the plant growth under normal and stressed conditions through direct mechanisms such as production of phytohormones, improved bioavailability of nutrients and modulation of plant ethylene level or through indirect mechanisms by protecting host plant from the attack of pests and phytopathogens. Moreover, phytoremediation efficiency of bacterial endophytes contributes towards adaptation and enhanced growth of plants in sites heavily contaminated with organic pollutants. Therefore, application of endophytic bacteria with beneficial characteristics could be developed as a promising tool for gaining our goals of safe and sustainable agriculture system.
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Reference
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