中国草地学报2025，Vol.47Issue(6)：78-89,12.DOI:10.16742/j.zgcdxb.20240413
狗牙根苗期抗旱性综合评价
Comprehensive Evaluation of Drought Resistance in Bermudagrass at the Seedling Stage
摘要
Abstract
To evaluate the differences in drought adaptability and post-drought recovery among various bermudagrass(Cynodon dactylon)germplasms,this study assessed seven physiological indices in 18 germ-plasms under drought stress and subsequent rewatering,using a natural drought simulation method.The study aimed to clarify the variations in drought resistance and recovery capacity,identify superior germ-plasm,and determine key indicators through grey correlation analysis.The results showed that by the 12th day of drought,the contents of leaf chlorophyll a,chlorophyll b,total chlorophyll,and relative water con-tent decreased significantly,whereas relative electrical conductivity,malondialdehyde,and proline con-tents increased significantly.Membership function analysis revealed that the D value for drought stress ranged from 0.056 to 0.725,while the D value for recovery after drought ranged from 0.239 to 0.828.Under drought stress conditions,germplasms C136,C75,and C92 showed higher D values(0.725、0.670、0.537,respectively).In terms of post-drought recovery,C121,C92 and C136 had the highest D values(0.828、0.767、0.721,respectively).Among the germplasms,the drought resistance and post-drought recovery capabilities of C136,C92,C100 and C22 were all higher than those of the four control variety.Grey correlation analysis indicated that chlorophyll a content was highly correlated with drought resistance,while leaf relative water content was highly correlated with post-drought recovery ability.These param-eters can serve as important indicators for evaluating drought tolerance in bermudagrass.关键词
狗牙根/抗旱评价/旱后恢复能力/种质资源Key words
Bermudagrass/Drought resistance evaluation/Post-drought recovery ability/Germplasm resources分类
农业科技引用本文复制引用
喻启坤,汤丽斯,李雯,韩宇,李培英,孙宗玖..狗牙根苗期抗旱性综合评价[J].中国草地学报,2025,47(6):78-89,12.基金项目
新疆维吾尔自治区重点研发项目(2023B02031) （2023B02031）
