Poster Presentation Science Protecting Plant Health 2017

Growth promotion of Chinese cabbage in salt stress conditions by Volatile organic compounds of Pseudomonas sp. NBC107   (#348)

sang mi yu 1 , Jung Hye Eom 1 , Sang-chul Jeong 1 , Yeong-Su Kim
  1. Nakdonggang National Institute of Biological Resources, Sangjusi, SANGJU-SI, South Korea

Soil salinity is a widespread problem that limits crop yield throughout the world. Moreover, the salinity stress in crops will increase due to climate change. Rhizobacteria can stimulate the germination of seeds and further the growth of many economically important crops by phytohormone production, nitrogen fixation, siderophore production, and volatile organic compound production. In this study, the rhizobacterial isolate Pseudomonas sp. NBC107 was selected and tested for the increase of salt tolerance and consequently stimulation of Chinese cabbage growth. The Pseudomonas sp. NBC107 didn't produced ACC deaminase and siderophore, which is known as the mode for inducing tolerance to salinity stress. In comparison to the controls, the vigor index and fresh weight of Chinese cabbage significantly increased by 12.1% and 7.4%, respectively, under the influence of VOCs of Pseudomonas sp. NBC107. When we analyzed the volatile organic compounds after growing the bacteria in screw cap vial containing LB broth, the main headspace compound (ca. 90.6% of the total area of all peaks) was indole (RT 14.756 min), and dimethyl trisulfide (ca. 1.42%, RT 8.889 min) and cyclic octaatomic sulfur (ca. 1.73%, RT 22.529 min), were only detected in relatively low amounts. The functional role of volatile organic compounds in plant growth promotion will be further studied.