Effects of waterlogging at booting stage on post-flowering root morpholo-gy,antioxidant enzyme activity and grain yield of wheat
To clarify the effects of soil waterlogging during the booting stage on the growth and development of wheat root in different soil layers after flowering and yield,this study used Yangmai 18 and Yannong 19 as test varieties,and used tube planting to treat wheat with waterlogging for 5 d,10 d,and 15 d during the booting stage.The non-wa-terlogging treatment was used as a control(CK)to analyze the effects of different waterlogging durations during the booting stage on the root morphology and antioxidant en-zyme activity in different soil layers after flowering,yield and its components of wheat.The results showed that waterlogging during the booting stage could significantly affect the root morphology,antioxidant enzyme activity after flowering,and yield of wheat.With the prolongation of waterlogging duration during the booting stage,the cumulative root length,cumulative root surface area,cumulative root volume,and average root diameter of wheat roots in different soil layers showed a decreasing trend at 6 d and 18 d after flowering.Under different waterlogging durations,the relative values of cumulative root length,cumulative root surface area,cumulative root volume,average root diameter to those of CK had no significant change.With the prolongation of waterlogging duration during the booting stage,the activities of superoxide dismutase(SOD)and peroxidase(POD)in roots at 18 days after flowering in different soil layers showed a decreasing trend,while the content of malondialdehyde(MDA)showed an increasing trend.The dry matter partition index of stems and leaves during the mature stage of wheat showed an increasing trend,while the dry matter partition index of grains showed a decreasing trend.Waterlogging during the booting stage reduced grain yield by affecting kernel number per spike and 1 000-grain weight.The cumulative root length,cumulative root surface area,cumu-lative root volume,root SOD activity,POD activity and MDA content at 18 days after flowering in 20.1-60.0 cm soil layer were significantly correlated with yield.
NETL
NSTL
万方数据
维普
