水稻感染小球菌核病后苯丙氨酸解氨酶活性的变化

CHANGES OF PAL ACTIVITY IN THE RICE INOCULATED NAKATAEA SIGMOIDEAM

对3个水稻品种感染小球菌核病后,在不同接种量、不同时期、不同品种、不同部位测定苯丙氨酸解氨酶(PAL)活性的变化。结果表明,3个水稻品种感病后PAL活性呈先上升后下降的趋势。在孕穗末期,在抗病距茎基部0～3 cm的组织,病后PAL在活性变化和酶上升的幅度变化上都为最大,而在感病距病斑3～7 cm组织,病后PAL活性上升幅度为最大。建议在品种抗性鉴定中,以在孕穗末期接种3个菌丝块在距茎基部3～7 cm组织之间取样测定PAL活性为好。

The activity of PAL is tested at different inoculated quantum, different period, different varieties, different place in 3 rice varieties inoculated Nakataea sigmoideam. The results show that the activity of PAL goes up at first and then comes down. During the later pregnancy period, the changes of PAL in activity and the going-up ranges of PAL activity are the largest between 0～3 cm tissue in the inoculated ken-93-341. The going-up ranges of PAL activity are the largest between 4～7 cm tissue in the inoculated Dongnong-416, it is suggested that it is better to test the activity of PAL to identify the resistance of variety inoculated with 3 pieces of fungi culture between 3～7 cm tissue during the later pregnancy period.