Integrated phytohormone production by the plant growth-promoting rhizobacterium Bacillus tequilensis SSB07 induced thermotolerance in soybean

Journal of plant interactions

article

Sang-Mo Kang¹  In-Jung Lee¹  Abdul Latif Khan³  Muhammad Waqas¹  Sajjad Asaf¹  Ko-Eun Lee¹  Yeon-Gyeong Park¹  Ah-Yeong Kim¹  Muhammad Aaqil Khan¹  Young-Hyun You⁵ 

[1] a School of Applied Biosciences, Kyungpook National University;e Research Institute for Dok-do and Ulleung-do Island, Kyungpook National University;b Natural and Medical Sciences Research Center, University of Nizwa;c Department of Agriculture Extension, Government Seed and Demonstration Farm;d Microorganism Resources Division, National Institute of Biological Resources, Incheon

关键词: Plant growth-promoting rhizobacterium;    thermotolerance;    plant growth;    Glycine max;    phytohormone;    Bacillus tequilensis;    phyllosphere;   

DOI  :  10.1080/17429145.2019.1640294

学科分类：纳米科学和纳米技术

来源: Taylor & Francis

【 摘 要 】

As a result of climate change, crops often experience high-temperature stress that can drastically hinder plant growth and development. In soybean, an economically important crop that is highly sensitive to heat stress, the use of plant growth-promoting rhizobacteria (PGPRs) represents a promising strategy for countering the negative effects of heat stress. Accordingly, a novel strain of Bacillus tequilensis (i.e. SSB07) that grows actively at high temperatures was isolated, identified, and characterized in the present study. SSB07 improved the growth of Chinese cabbage seedlings and was shown to produce the gibberellins GA1, GA3, GA5, GA8, GA19, GA24, and GA53, as well as indole3-acetic acid and abscisic acid. The application of B. tequilensis SSB07 was also found to increase the shoot length and biomass, leaf development, and photosynthetic pigment contents of soybean plants, and under heat stress, SSB07 inoculation significantly increased the endogenous jasmonic acid and salicylic acid contents of the phyllosphere and significantly down-regulated the production of stress-responsive ABA. Thus, B. tequilensis SSB07 shows promise for countering the negative effects of climate change on crop growth and development.

【 授权许可】

CC BY|CC BY-NC