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Streptomyces sp. strain PGPA39 alleviates salt stress and promotes growth of ‘Micro Tom’ tomato plants
Author(s) -
Palaniyandi S.A.,
Damodharan K.,
Yang S.H.,
Suh J.W.
Publication year - 2014
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1111/jam.12563
Subject(s) - nutraceutical , library science , chemistry , food science , computer science
Aims To identify an actinobacterial strain that can promote growth and alleviate salinity stress in tomato plants. Methods and Results Actinobacteria were isolated from agricultural soil and screened for ACC deaminase activity, production of indole acetic acid ( IAA ), solubilization of tricalcium phosphate and sodium chloride ( N a C l) salinity tolerance. Among the several strains tested, one strain designated PGPA 39 exhibited higher IAA production, and phosphate solubilization in addition to ACC deaminase activity, and tolerance to 1 mol l −1 N a C l. Strain PGPA 39 was identified as a S treptomyces strain based on 16S r DNA sequence and designated S treptomyces sp. strain PGPA 39. It promoted the growth of A rabidopsis seedlings in vitro as evidenced by a significant increase in plant biomass and number of lateral roots. Salinity stress‐alleviating activity of PGPA 39 was evaluated using ‘ M icro T om’ tomato plants with 180 mmol l −1 N a C l stress under gnotobiotic condition. A significant increase in plant biomass and chlorophyll content and a reduction in leaf proline content were observed in PGPA 39‐inoculated tomato plants under salt stress compared with control and salt‐stressed noninoculated plants. Conclusions Streptomyces sp. strain PGPA 39 alleviated salt stress and promoted the growth of tomato plants. Significance and Impact of the Study This study shows the potential of S treptomyces sp. strain PGPA 39 in alleviating salinity stress in tomato plants and could be utilized for stress alleviation in crop plants under field conditions.