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Effect of osmotic stress on plant growth promoting Pseudomonas spp.

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Title Effect of osmotic stress on plant growth promoting Pseudomonas spp.
Effect of osmotic stress on plant growth promoting Pseudomonas spp.
 
Creator ICAR_CRIDA
 
Subject Pseudomonas spp. · Drought stress · Osmolytes · PGP traits · 16S rDNA
 
Description Not Available
In this study we isolated and screened drought
tolerant Pseudomonas isolates from arid and semi arid crop
production systems of India. Five isolates could tolerate
osmotic stress up to ¡0.73 MPa and possessed multiple
PGP properties such as P-solubilization, production of phytohormones
(IAA, GA and cytokinin), siderophores,
ammonia and HCN however under osmotic stress expression
of PGP traits was low compared to non-stressed conditions.
The strains were identiWed as Pseudomonas
entomophila, Pseudomonas stutzeri, Pseudomonas putida,
Pseudomonas syringae and Pseudomonas monteilli respectively
on the basis of 16S rRNA gene sequence analysis.
Osmotic stress aVected growth pattern of all the isolates as
indicated by increased mean generation time. An increase
level of intracellular free amino acids, proline, total soluble
sugars and exopolysaccharides was observed under osmotic
stress suggesting bacterial response to applied stress. Further,
strains GAP-P45 and GRFHYTP52 showing higher
levels of EPS and osmolytes (amino acids and proline)
accumulation under stress as compared to non-stress conditions,
also exhibited higher expression of PGP traits under
stress indicating a relationship between stress response and
expression of PGP traits. We conclude that isolation and
screening of indigenous, stress adaptable strains possessing
PGP traits can be a method for selection of eYcient stress
tolerant PGPR strains.
Not Available
 
Date 2020-02-25T08:20:25Z
2020-02-25T08:20:25Z
2010
 
Type Technical Report
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/32748
 
Language English
 
Relation Not Available;
 
Publisher  Gopal Reddy, B.Venkateswarlu