【摘要】 研究不同干旱胁迫方式对小麦幼苗活性氧清除能力的影响,测定小麦对羟自由基(.OH),过氧化氢(H2O2)和超氧阴离子自由基(O2-.)的清除能力变化,分为间断干旱胁迫和持续干旱胁迫两种。结果表明:正常生长的小麦具有一定的清除活性氧(.OH,H2O2,O2-.)的能力;间断干旱胁迫和持续干旱胁迫都会对小麦活性氧清除能力造成影响,总体上是使活性氧清除能力上升,根和叶对相同处理表现出不同的反应;与间断干旱比较,持续干旱对小麦活性氧清除能力的影响较大且延续时间长,持续干旱处理使小麦表现出更强的活性氧清除能力;复水后,小麦活性氧清除能力表现出不同的变化。更多还原

【Abstract】 Two different kinds of water stress were applied to treat the wheat seedling.The scavenging activity of hydroxyl radical（·OH） hydrogen peroxide and superoxide radical（O₂^-·） in stressed seedlings were determined.Results indicated that the normal growth wheat seedlings possessed reactive oxygen species scavenging acivity.Both discontinuous and continuous drought stress affected the response of reactive oxygen species scavenging activity of wheat seedlings.The response of root and the leaf to drought stress was different.The continuous drought-stress had greater effect than the discontinuous one.The reactive oxygen species scavenging activity showed different tendency after rehydration.更多还原