摘要
陆地棉感染枯萎病后、叶片膜脂脂肪酸组成分中的不饱和脂肪酸亚麻酸的相对百分含量下降,供试两个品种分别减少7.79％和8.04％,而不饱和脂肪酸亚油酸的含量有所增加,分别增加了2.31％和6.01％,不饱和脂肪酸油酸含量亦增多,分别增多3.46％和2.86％,脂肪酸的不饱和系数减少。与健株叶片相比较,在感染了枯萎病的棉株叶片中,糖含量变化以蔗糖、肌醇和x糖最为明显,蔗糖下降64.4％～69.0％,x糖降低52.4％～61.6％,肌醇减少32.6％～51.2％,以蔗糖含量减少幅度最大。病株叶片的净光合速率较健株叶片下降58.7％～62.8％。气孔导度仅为健叶的21.3％～35.6％,蒸腾速率为健叶的31.8％～53.3％。病株叶片的温度较正常叶片高,甚至可超过气温。
The relative contents of lenolenic acid of unsaturated fatty acid composed in the fatty acid of cotton leaves decreased 7.79% and 8.04%, respectively after infected with Fusarium wilt in the two upland cotton varieties, while the contents of linolic acid increased 2.31% and 6.01%, respectively, the contents of oleic acid increased 3.46% and 2.86%, respectively, but the unsaturated index of the fatty acid decreased. Compared with the healthy leaves, there were significant changes for sugar contents in sucrose, inositol and X sugar for the leaves infected with Fusarium wilt, sucrose increased 64.4%～69.0%, X sugar decreased 52.4%～61.6%, inositol deerased 32.6%～51.2%, with the most decrease rate of sucrose. In the infected plants, the net photosynthetic rate decreased 58.7%～62.8%, the stomota conductance was 21.3%～35.6%, and transpiration rate was 31.8%~53.3% compared with the healthy plants, The leaf temperature is higher than that of the healthy ones, and even passed over the air temperature.
出处
《棉花学报》
CSCD
北大核心
1992年第2期67-72,共6页
Cotton Science
关键词
棉花
枯萎病
生理代谢
cotton Fusarium wilt
physiological metablism
