花铃期干旱胁迫对棉花生理生化指标的影响

摘要

研究了花铃期干旱胁迫对4个不同类型棉花品种生理生化指标的影响。结果表明：花铃期干旱胁迫使棉花叶片的脯氨酸、可溶性糖和丙二醛含量增加，使过氧化氢酶、超氧化物歧化酶、过氧化物酶的活性增高。运用隶属函数法进行抗旱性综合评价得出，花铃期干旱胁迫下4个棉花品种的抗旱性由强到弱依次为衡优12＞冀棉958＞中177＞邯杂306。%The effects of drought stress at flowering and boll -forming stages on the physiological and biochemical indexes of 4 different types of cotton varieties were researched .The results indicated that drought stress at flowering and boll -forming stages could increase the contents of proline, soluble sugar and malondialdehyde in cotton leaves , and enhance the activities of catalase , superox-ide dismutase and peroxidase in cotton leaves .The drought-resistance of 4 cotton varieties under drought stress at flowering and boll-forming stages was comprehensively evaluated by using membership function method , and these varieties could be arranged as fol -lows based on their drought -resistance: Hengyou 12>Jimian 958>Zhong 177>Hanza 306.