不同种植行距的大穗型小麦品种‘兰考矮早八’中几种与旗叶衰老有关的生理指标变化  

Changes in Several Physiological Indices Related to Senescence in Flag Leaves of Heavy-ear Wheat‘Lankao aizao8’with Different Row Spacing

作　　者：郭天财[1] 刘胜波[1] 冯伟[1] 杨文平[1] 王永华[1] 韩巧霞[1] 

机构地区：[1]河南农业大学国家小麦工程技术研究中心,郑州450002

出　　处：《植物生理学通讯》2008年第1期33-36,共4页Plant Physiology Communications

基　　金：“十一五”国家科技支撑计划重大项目(2006BAD02A07);河南省重大科技攻关项目(0522010100)。

摘　　要：在大田高产栽培条件下,检测不同种植行距的大穗型小麦品种‘兰考矮早八’开花后与旗叶衰老相关生理指标以及产量性状的结果表明,相对于传统行距为20 cm而言,‘兰考矮早八’种植行距缩至15 cm的花后旗叶中叶绿素降解减慢,丙二醛(MDA)含量下降,抗氧化系统酶活性增强,功能叶衰老减缓,穗粒重提高;行距缩至10 cm时,尽管灌浆中后期过氧化物歧化酶(SOD)活性增强,但过氧化氢酶(CAT)和过氧化物酶(POD)活性下降,花后旗叶中叶绿素降解加快,MDA含量升高,植株衰老加快,穗粒重下降。Under the condition of highyield planting, physiological indices related to senescence in flag leaves and yield characters of heavy-ear wheat ‘Lankao aizao8＇ with different row spacing were determined. The results showed that compared with wheat with row spacing of 20 cm, wheat with row spacing of 15 cm had a delay of chlorophyll degradation, less content of malondialdehyde （MDA）, higher activity of antioxidant enzymes and higher spike grain weight. The wheat with row spacing of 10 cm had higher activity of superoxide dismitase （SOD） in late grain filling, but activities of catalase （CAT） and peroxides （POD） decreased, and chlorophyll degradation accelerated, content of, MDA increased, senescence of plants accelerated and spike grain weight decreased.

关 键 词：小麦 行距配置 衰老 抗氧化酶 产量 

分 类 号：S512.1[农业科学—作物学] S513