Abstract:

This experiment was carried out to study the effects of the activity of several key enzymes on the stem lodging resistance in Brassica napus L.. The activities of cinnamyl alcohol dehydrogenase, β-1,3-glucanase, sucrose synthase, peroxidase in lodging-resistant group (R) and lodging group (D) were tested in filling period. The results showed that the stem lodging-resistance was influenced strongly by the enzymes activity; there was some difference in the activities of cinnamyl alcohol dehydrogenase in 2 groups. Activities of β-1,3-glucanase, Sucrose Synthase and peroxidase in lodging-resistant group were significantly higher than that in lodging group. They are all the important factors which lead to different lodging resistance in Brassica napus L.. Lignin biosynthesis is a complicated polygenic and poly-pathway process. The results suggested that cellulose and lignin played a key role in stem lodging resistance.