烟草科技2019，Vol.52Issue(6)：30-34,5.
烟草根系分泌物对黑胫病菌菌丝生长的影响
Effects of tobacco root exudates on mycelium growth of Phytophthora parasitica var. nicotianae
摘要
Abstract
In order to investigate the resistance mechanism of tobacco varieties to black shank, resistant varieties (Florida 301, L8, Beinhart1000-1 and Gexin 3) and susceptible varieties (Zhongyan 100, Guiyan 13, Honghuadajinyuan and Xiaohuangjin 1025) were selected to assess the effects of root exudates from eight tobacco varieties on the mycelium growth of Phytophthora parasitica var. nicotianae (Breda de Hean) Tuker. The results showed that the root exudates from the four resistant varieties had clear inhibitory effects on the mycelium growth of P. parasitica var. nicotianae with inhibition ratios from 5.93% to 20.78% . The colony diameters treated by root exudates from the four resistant varieties were significantly smaller than the control (P<0.05). Comparing with the control, the root exudates from susceptible varieties (Guiyan13, Honghuadajinyuan and Xiaohuangjin 1025) promoted the mycelium growth of P. parasitica var. nicotianae with the inhibitory ratios from -16.47% to -2.15% . The colony diameters treated by root exudates from the three susceptible varieties were extremely significantly larger than the control (P<0.01). However, susceptible variety Zhongyan 100 did not promote the mycelium growth of P. parasitica var. nicotianae. Therefore, the effects of tobacco root exudates on the mycelium growth of P. parasitica var. nicotianae were correlated to the resistance of tobacco varieties.关键词
烟草/黑胫病/根系分泌物/病菌菌丝/品种/抗性Key words
Tobacco/Black shank/Root exudate/Pathogen mycelium/Variety/Resistance分类
农业科技引用本文复制引用
LOU Xiaoping,ZHAO Jiongping,WANG Haibo,WANG Haisheng,WANG Gang,ZHU Xiaoming,SHI Jiao..烟草根系分泌物对黑胫病菌菌丝生长的影响[J].烟草科技,2019,52(6):30-34,5.基金项目
中国农业科学院科技创新工程项目"烟草病虫害防控"(ASTIP-TRIC04) （ASTIP-TRIC04）
浙江中烟有限责任公司资助项目"协调烤烟烟叶化学成分的关键技术研究"(14020140007). （14020140007）
