乙烯促进与抑制剂对旱后复水玉米生长、保护酶活性及膜脂过氧化的影响

以玉米品种郑单958为材料，研究了不同程度干旱胁迫与复水条件下乙烯促进与抑制剂处理对春玉米生长、叶片保护酶系活性变化及其对膜脂过氧化作用的影响。结果表明：（1）乙烯利有利于控制玉米的株高，并提高轻度干旱条件下玉米的根重和生物量，而AgNO3（硝酸银）处理的玉米在轻度与重度干旱条件下，生物量明显降低。（2）乙烯利处理可明显抑制水分胁迫条件下玉米MDA（丙二醛）的合成，降低相对电导率，提高可溶性蛋白含量，而AgNO3处理的效果则与乙烯利刚好相反。（3）乙烯利处理可明显提高SOD（超氧化物酶）、CAT（过氧化氢酶）和POD（过氧化物酶）的活性，而AgNO3处理在一定程度上抑制SOD、CAT和POD的活性。

Effects of Ethylene Inhibitor and Promoter on Growth, Protective Enzyme Activities and Lipid Peroxidation of Maize under Water Stress and Rewatering Conditions

A systematic study was conducted to determine the effects of ethylene inhibitor and pomoter on growth, protective enzyme activities and lipid peroxidation of maize under water stress and rewatering conditions. The results showed that, ethephon treatments were profitable to control plant height, and promote root weight and biomass under light drought stress, while biomass of AgNO3 treatments decreased compared with control under light drought and heavy drought stress conditions. Ethephon treatments could depress MDA synthesis and relative electric conductivity, reduced soluble protein content, and the effects of AgNO3 on MDA synthesis, relative electric conductivity and soluble protein content was contrast to that of ethephon treatments. Ethephon treatments could promote superoxide dismutase (SOD), catalase (CAT) and peoxidase (POD) activities, while AgNO3 could depress SOD, CAT and POD activities.