杂交春性小麦叶片衰老与保护酶系统活性的研究  

Leaf Senescence and Protective Enzyme System of Spring Wheat Hybird

作　　者：杨淑慎[1] 高俊凤[1] 李学俊[1] 吕金印[1] 高梅[1] 

机构地区：[1]西北农林科技大学生命科学学院,杨凌712100

出　　处：《中国农业科学》2004年第3期460-463,共4页Scientia Agricultura Sinica

基　　金：国家自然科学基金资助项目(39670436)

摘　　要：以常规小麦品种陕229为对照研究了强优势K型杂交春性小麦901叶片衰老与保护酶系统活性的关系。结果表明,在小麦灌浆前期2品种小麦叶片脂质过氧化产物MDA的含量都较低,质膜透性也较小。灌浆后期,常规小麦品种陕229脂质过氧化产物MDA的含量及质膜透性都极显著高于杂交春性小麦901。杂交春性小麦901酶促防御系统的保护酶SOD、POD、CAT活性高且相对稳定,清除代谢过程中产生的活性氧自由基的能力强,能较长时间的维持叶片细胞结构完整,合成充足的光合同化产物,使小麦的抗逆性增强,叶片衰老延迟,产量提高。The superior type K hybrid spring wheat 901 was used to study the relationship between leaf senescenceand protective enzyme system with the conventional wheat variety Shann 229 as control group. The study indicated thatthe activities of all kinds of protective enzymes SOD, POD and CAT in hybrid 901 were higher and more stable than thoseof Shann 229. The ability of hybrid 901 to eliminate free radicals and active oxygen was better and the cell structural integritycould be maintained in a longer period. Therefore, the stress resistance was enbanced and the leaf senescence was delayed.

关 键 词：春小麦 叶片 衰老 膜脂过氧化 保护酶活性 丙二醛 超氧化歧化酶 过氧化物酶 过氧化氢酶 

分 类 号：S512.12[农业科学—作物学]