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对 3种不同抗旱性的花生栽培品种进行渗透胁迫处理。结果表明 :渗透胁迫使花生幼叶水势 ( ΨL)下降 ,花生幼叶的 O- 2 · 产生速率随渗透胁迫处理强度加大而增加 ,MDA含量以及 SOD、POD和 CAT的活性水平变化与 O- 2 · 产生速率的变化趋势相似。 MDA含量明显增高 ,其过程与水势呈负相关与 RPMP呈正相关 ,均达极显著水平。渗透胁迫处理过程中 ,GSH和 As A含量下降。与泉花 1 0号和汕油 71相比 ,白皮 1号 RPMP增加幅度、O- 2 · 产生速率和 MDA含量增加幅度都明显较小。SOD、POD和 CAT的活性水平下降较缓 ,GSH含量呈先增加后下降趋势 ,As A含量下降较慢。综合分析表明 ,白皮 1号品种具有较强的抗旱能力
Three kinds of peanut cultivars with different drought tolerances were treated with osmotic stress. The results showed that the osmotic stress decreased the water potential (ΨL) of young peanut leaves, the rate of O 2 production in young peanut leaves increased with the increase of osmotic stress intensity, the content of MDA, the activities of SOD, POD and CAT, 2. The trend of production rate is similar. MDA content was significantly increased, the process was negatively correlated with water potential and RPMP was positively correlated, reached a significant level. During osmotic stress, the content of GSH and As A decreased. Compared with Quanhua10 and Shanyou71, the increase of RPMP, the increase rate of O-2 · production rate and the content of MDA in Baipi 1 were significantly smaller. SOD, POD and CAT activity decreased slowly, GSH content increased first and then decreased, As A decreased slowly. Comprehensive analysis showed that White Pigeon 1 has strong drought resistance