中文摘要：

对蕾期、盛花期和终花期的芝麻品种进行了24～60h的湿害处理,测定了叶片保护酶（POD、SOD、CAT）、植株萎蔫率、死株率等14个性状.结果表明,蕾期和盛花期芝麻叶片中保护酶SOD、POD和CAT活性随着湿害处理时间的延长均呈先升后降的趋势,品种间存在差异.蕾期和盛花期湿害处理对芝麻生长速率、植株萎蔫率和死株率影响较大,尤以盛花期最为严重.3个生育时期的芝麻品种受湿害处理后均蒴果数减少、种子产量降低、根系早衰甚至烂根.芝麻叶片保护酶活性与植株萎蔫率、死株率呈显著或极显著负相关,与生长速率、有效蒴果数等9个考察性状呈正相关,且大部分相关系数达到显著或极显著水平.综合各项考察指标,湿害处理对芝麻盛花期影响最为严重,且36h是多项指标发生急剧变化或转折的敏感时间,湿害后的表现型性状变化趋势与叶片保护酶活性变化趋势在品种间基本一致.图4表1参23

英文摘要：

Sesame varieties were waterlogged for 24～60 h and 14 characteristics including the activities of protective enzymes （SOD,POD and CAT） in sesame leaves,withering rate and death rate of sesame plants were detected at the budding,full flowering and ending flowering stages. The results showed that the activities of the protective enzymes （SOD,POD and CAT） in sesame leaves obviously increased first,and then decreased along with the process of waterlogging treatment; differences existed among different varieties at the budding and full flowering stages; and the waterlogging effects were found great on the growth rate, withering rate and death rate of sesame plants at tlae butaalng ano iul~ Howcrm~ ~ta~, ~e J flowering stage. The activities of the protective enzymes were significantly negatively correlative （0.05 or 0.01 level） with withering rate and death rate of sesame plants, but positively correlative with other 9 detected characters, such as the growth rate and capsules per plant, and the most correlation coefficients reached at significant or extremely significant level （0.05 or 0.01 level）. The experiment indicated the effects of waterlogging on sesame were the most obvious at the full flowering stage and 36 h was sensitive time of waterlogging. The changes in leaf protective enzyme activities were consistent with the difference in agronomic characteristics of different sesame varieties after waterlogging treatment. Fig 4, Tab 1, Ref 23