Evaluation on Waterlogging Tolerance of Different Peanut Varieties at Seeding Stage
In order to study the difference of tolerance to waterlogging of commonly planted peanut varieties in China,the germination rate,SPAD value,root length,plant height,root biomass and other related indexes of different varieties were measured in a pot experiment at the seeding stage with normal moisture as the control group,and the waterlogging stress treatment was set for 48 hours,the waterlogging resistance of different peanut varieties was comprehensively evaluated to screen out peanut varieties with significant difference in waterlogging tolerance.The results showed that the morphological establishment in peanut seedling stage was inhibited to different degrees by waterlogging.Compared with the control groups,the root fresh weight,aboveground fresh weight,root biomass,aboveground biomass,and plant biomass of peanut under waterlogged conditions were decreased by 52.24％,45.43％,54.22％,37.84％,and 41.81％,respectively.Under waterlogging stress,the average coefficient of variation value of the above-ground morphological indicators was 32.48,while the average coefficient of variation value of the root morphological indicators reached 38.62.The relative values of root fresh weight,plant fresh weight,root length,plant height and SPAD value were used as indicators to evaluate the waterlogging-tolerant in peanut.The cluster analysis was conducted to classify 16 peanut varieties in this study into two categories of strong and weak waterlogging resistance,which laid a good theoretical foundation for further research on the waterlogging tolerance mechanism and cultivation of waterlogging-resistant varieties in peanut.
国家科技期刊平台
NSTL
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