Extracellular Polymeric Substances of Pseudomonas chlororaphis O6 Induce Systemic Drought Tolerance in Plants

Research in Plant Disease

Anne J. Anderson¹  Song Mi Cho²  Young Cheol Kim³ 

[1] Department of Biological Engineering, Utah State University, Logan, UT 84322-5305, USA;Department of Floriculture, Chunnam Techno University, Jeonnam 57500, Korea;Institute of Environmentally-Friendly Agriculture, Department of Plant Biotechnology, Chonnam National University, Gwangju 61186, Korea;

关键词: Abiotic stress;    Biological control;    Priming;    Stomatal closure;   

DOI  :  10.5423/RPD.2018.24.3.242

来源: DOAJ

【 摘 要 】

Pseudomonas chlororaphis O6 induces systemic tolerance in plants against drought stress. A volatile, 2R, 3R-butanediol, produced by the bacterium causes partial stomatal closure, thus, limiting water loss from the plant. In this study, we report that applications of extracellular polymeric substances (EPS) from P. chlororaphis O6 to epidermal peels of leaves of Arabidopsis thaliana also reduce the size of stomatal openings. Growth of A. thaliana seedlings with applications of the EPS from P. chlororaphis O6 reduced the extent of wilting when water was withheld from the plants. Fluorescence measurements showed photosystem II was protected in the A. thaliana leaves in the water stressed EPS-exposed plants. These findings indicate that P. chlororaphis O6 has redundancy in traits associated with induction of mechanisms to limit water stress in plants.

【 授权许可】

Unknown