Abstract
Mung bean (Vigna radiata (L.) R. Wilczek), a widely cultivated pulse crops in India, experiences severe drought stress during the cultivation period. Apart from the conventional plant breeding and transgenic approaches, the application of plant growth-promoting rhizobacteria (PGPR) has always been a promising approach to improve abiotic stress tolerance in crop plants. The aim of the present study was to investigate the role of mung bean rhizosphere-associated Pseudomonas aeruginosa GGRJ21 strain on drought stress alleviation in the host plant. Fluorescent pseudomonads were isolated from mung bean rhizosphere by employing a culture-dependent approach. The role of osmotic stress tolerant P. aeruginosa GGRJ21 on drought stress alleviation in host plants was further examined in both the green house and field conditions. An elevated production of reactive oxygen species scavenging enzymes and cellular osmolytes; increased root length, shoot length, dry weight, relative water content; and a stronger upregulation of three drought stress-responsive genes, i.e., dehydration-responsive element binding protein (DREB2A), catalase (CAT1), and dehydrin (DHN) were observed in GGRJ21 inoculated plants in comparison with the uninoculated control plants tested under drought conditions. The field experimental data show an increase in biomass and better growth and development in inoculated and stressed plants when compared with untreated and stressed plants. P. aeruginosa GGRJ21 strain was found to elicit water stress tolerance in mung bean plants by accelerating the accumulation of inherent levels of antioxidant enzymes, cell osmolytes, and consistently expediting the upregulation of stress responsive genes in PGPR-treated plants under water stress conditions.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
