Kachhap, S. and Chaudhary, A. and Singh, S.D. (2015) Response of plant growth promoting rhizobacteria (PGPR) in relation to elevated temperature conditions in groundnut (Arachis hypogaea L.). The Ecoscan, 9 (3-4). pp. 771-778.
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Abstract
The increase in carbon dioxide and temperature under climate change scenario has been shown to increase plant growth as well as the allocation of nutrients to the below ground ecosystem. This allocation may result in alteration of plant-microbe interaction, specifically Plant Growth Promoting Rhizobacterial (PGPR) population which is dependent on rhizodepostion. This study investigated the impact of elevated temperature on some PGPR populations in rhizosphere of groundnut variety B-95. Rhizosphere samples were collected at different phenological stages. Various strains of Pseudomonas spp., Enterobacter spp., Azotobacter spp. and Acetobacter spp. were enumerated, isolated and tested for several PGP traits such as Indole Acetic Acid (IAA), siderophore, cyanide production etc. Results showed consistent statistically significant differences in the numbers of bacteria between ambient and above ambient temperature treatments. Total 62 isolates represented 32.26% Pseudomonas, 27.42% Enterobacter 20.97% Azotobacter and 19.35% Acetobacter population. 74.19% of the total isolates were able to produce IAA whereas 69.35% of the total isolates were positive for NH3 production. Pseudomonas spp. were strongest exhibiters of protease activity (75%). 25 and 32 strains could display antagonism for Aspergillus niger and Fusarium moniliforme respectively. No loss or gain of PGP traits as a result of elevated temperature could be observed.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PGPR, Groundnut, Elevated temperature, Pseudomonas, Enterobacter |
| Author Affiliation: | Centre for Environment Science and Climate Resilient Agriculture (CESCRA), Indian Agricultural Research Institute (IARI), New Delhi - 110012 |
| Subjects: | Plant Physiology and Biochemistry > Plant Physiology Plant Physiology and Biochemistry > Biochemistry |
| Divisions: | Groundnut |
| Depositing User: | Mr T L Gautham |
| Date Deposited: | 29 Mar 2016 03:54 |
| Last Modified: | 29 Mar 2016 03:54 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/14245 |
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