小麦品种可溶性糖和保护性酶与抗旱性关系研究

采用旱胁迫和灌水两种处理条件,对21个抗旱性不同的冬小麦品种苗期的可溶性糖、SOD和POD进行测定,并以籽粒产量、抗旱指数为目标性状进行抗旱性相关关系研究.结果表明:同一水分处理下不同品种间的可溶性糖、SOD和POD活性差异较大,抗旱指数高的品种明显高于抗旱指数低的品种；且丰产抗旱性品种的可溶性糖、POD和SOD酶活性...

Study on the relation of soluble sugar, ptotective enzyme and drought resistance in wheat

In order to study the correlation of drough resistance with certain factors under drough-stressed and non-stressed conditions, souble sugar (SS), SOD and POD of 21 winter wheat varieties at seeding stage were measured, and the grain yield and drought resistance index (DRI) were amalysed as target traits. The results showed that there were great differences in SS, SOD and POD in different cultiva rs under each treatment; The content of SS, SOD and POD of the most high-yield and drough-resistant wheat varieties reaches 41.68 mg/g, 496.3 U/(g·min FW) and 169.73 U/(g·min FW) or even more. The analysis of relativity indicated that SS, SOD and POD were highly correlated with DRI, the correlation ranked as r_SS>r_POD>r_SOD; The pathway indicated that SS played an important role in the yield and DRI under drought stress; The coefficient of effects was 0.5584 and 0.5264; The SS, SOD and POD played positive direction effect on yield and DRI under drought-stressed conditions. In conclusion, they can be used as indicators to identify drought-resistant varieties.