摘要
检测了不同抗病类型甘蔗品种受黑穗病菌(UstilagoscitamineaSyd.)侵染后苯丙氨酸解氨酶(PAL)、酪氨酸解氨酶(TAL)、4—香豆酸辅醇A连接酶(CoAligase)活性以及绿原酸和黄酮类化合物含量的动态变化.结果表明:受病菌侵染后各品种的PAL、TAL、CoAligase比活性均有一个明显的消长过程,但高抗品种NCo376、“ROC”10酶活性上升的幅度和持续时间显著大于高感品种F134、FN83—0706;同时,与高感品种相比.高抗品种绿原酸与黄酮类化合物的累积时间早,累积量也明显增加.因此,我们认为甘蔗黑穗病菌诱导PAL、TAL、CoAligase活性提高,增强了合成绿原酸、黄酮类化合物等多种抗病次生物质的苯丙烷类代谢,这可能是甘蔗对黑穗病侵染后抗性(Post-infectionalresistance)机制的一个重要方面.
PAL,TAL,CoAligase specific activities and chlorogenic acid,total flavone contents were measured in sugarcane cultivars with different resistance to smut after inoculation with Ustilago scitaminea Syd.The results showed that PAL,TAL,CoAligase activities of all varieties appeared to increase after inoculation, but three enzymatic activities of two highly resistant varieties(NCo376,“ROC”10)were higher and maintained longer time than those of highly susceptible ones; At the same time,the accumulation of chlorogenic acid, total flavone contents in 2 highly resistant cultivars was not only earlier, but also much more. Therefore, we suggested that strengthening of phenylpropanoid metabolism induced by Ustilago scitaminea might be an important aspect of sugarcane postinfectional resistant mechanism to smut.
出处
《福建农业大学学报》
CSCD
1995年第4期394-398,共5页
Journal of Fujian Agricultural University
基金
福建省自然科学基金
关键词
甘蔗
黑穗病
苯丙烷
代谢
抗性
sugarcane
phenylpropanoid metabolism
resistance to smut
resistant mechanism