Chemotactic response of Ginseng bacterial soft-rot to Ginseng root exudates

Saudi Journal of Biological Sciences

Aihua Zhang¹  Wenli Ma¹  Lianxue Zhang¹  Rujun Zhou²  Junfan Fu²  Dan Wang²  Fengjie Lei² 

[1] College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun 130118, China;Plant Protection College, Shenyang Agricultural University, Shenyang 110866, China;

关键词: Panax ginseng C. A. Mey;    Ginseng soft-rot bacteria;    Ginseng root exudates;    Chemotactic response;   

DOI  :  10.1016/j.sjbs.2017.05.006

来源: DOAJ

【 摘 要 】

Our purpose was to evaluate chemotactic response of Ginseng bacterial soft-rot to ginseng root exudates. The exudates of plant roots has a significant influence on the population changes of rhizosphere microorganisms and chemotaxis is an important way in which many pathogens sense the signals of host plants and invade the host plants. In this study, with the capillary method, we tested the chemotactic responses of Ginseng bacterial soft-rot for three ginseng roots exudates under four chemotactic parameters (concentration, temperature, pH and time). The results showed that the chemotatic response of the Ginseng bacterial soft-rot for the ginseng roots exudates at the water layer where pH = 7 and the concentration was 0.0125 mg/L reached its peak value under the circumstance that the exudates was cultivated for 60 min at 25 °C. The chemotatic ratios were respectively 124.89% and 89.44%. For the butanol extract layer and the petroleum ether faction at the concentration of 0.125 mg/L and the pH value at 7, the ginseng roots exudatess reached peak values at 25 °C and 30 °C and 60 min and 75 min respectively, and the chemotatic ratios were respectively 139.64% and101.87%, and 115.29% and 81.36%. The three ginseng roots exudates had positive effects for the chemotaxis of the Ginseng soft-rot bacteria, but the effect declined as the concentration increased.

【 授权许可】

Unknown