NDLI: Alleviation of drought stress in mung bean by strain Pseudomonas aeruginosa GGRJ21

Content Provider	Springer Nature Link
Author	Sarma, Rupak K. Saikia, Ratul
Copyright Year	2013
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.
Starting Page	111
Ending Page	126
Page Count	16
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	377
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer International Publishing
Publisher Date	2013-12-15
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Drought stress Pseudomonas aeruginosa Catalase Peroxidase Superoxide dismutase Proline Reactive oxygen species Plant Sciences Soil Science & Conservation Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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