期刊
PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS
卷 23, 期 3, 页码 571-580出版社
SPRINGER
DOI: 10.1007/s12298-017-0449-4
关键词
Abscisic acid; Bacillus amyloliquefaciens H-2-5; Gibberellins; Phosphate solubilisation; Plant growth; Salt stress
资金
- Agenda Program through the Rural Development Administration, Republic of Korea [PJ01228603]
This study was aimed to identify plant growth-promoting bacterial isolates from soil samples and to investigate their ability to improve plant growth and salt tolerance by analysing phytohormones production and phosphate solubilisation. Among the four tested bacterial isolates (I-2-1, H-1-4, H-2-3, and H-2-5), H-2-5 was able to enhance the growth of Chinese cabbage, radish, tomato, and mustard plants. The isolated bacterium H-2-5 was identified as Bacillus amyloliquefaciens H-2-5 based on 16S rDNA sequence and phylogenetic analysis. The secretion of gibberellins (GA(4), GA(8), GA(9), GA(19), and GA(20)) from B. amyloliquefaciens H-2-5 and their phosphate solubilisation ability may contribute to enhance plant growth. In addition, the H-2-5-mediated mitigation of short term salt stress was tested on soybean plants that were affected by sodium chloride. Abscisic acid (ABA) produced by the H-2-5 bacterium suppressed the NaCl-induced stress effects in soybean by enhancing plant growth and GA(4) content, and by lowering the concentration of ABA, salicylic acid, jasmonic acid, and proline. These results suggest that GAs, ABA production, and the phosphate solubilisation capacity of B. amyloliquefaciens H-2-5 are important stimulators that promote plant growth through their interaction and also to improve plant growth by physiological changes in soybean at saline soil.
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