玉米生育后期不同节位叶片和叶鞘的生理特性变化  

Physiological Characteristic Changes of Leaf and Leaf Sheath at Different Stem Nodes of Maize in the Late Growth Stage

作　　者：童淑媛[1] 宋凤斌[2] 

机构地区：[1]黑龙江农业经济职业学院,黑龙江牡丹江157041 [2]中国科学院东北地理与农业生态研究所,吉林长春130012

出　　处：《黑龙江农业科学》2012年第8期34-37,46,共5页Heilongjiang Agricultural Sciences

基　　金：国家863计划资助项目(2006AA10Z227)

摘　　要：为选育玉米优良品种,促进其高产栽培,以郑单958为试验材料,研究了生育后期其不同节位叶片和叶鞘生理特性的变化。结果表明:灌浆过程中,叶片和叶鞘的叶绿素含量、蛋白质含量的降低和MDA含量的增加幅度均表现为中部<上部<下部。生育后期,叶鞘的叶绿素、可溶性蛋白质含量的降低幅度明显高于叶片,表明叶鞘在衰老过程中抗逆性差。In order to develop superior maize varieties and promote high yield cultivation, the maize hybrid Zhengdan 958 of upright-leaf type was used as experimental materials. Physiological characteristic changes of leaf and leaf sheath at different nodes of maize were investigated in the late growth stage. The results showed that chlorophyll content and soluble protein content were decreased,MDA content was increased during grain filling process. The change range presented as the middle leaf（leaf sheath）〈the upper leaf（ leaf sheath）〈the lower leaf. The lowered range of chlorophyll content and soluble protein content in leaf sheath was much higher than leaf at late growth stage,it indicated that stress resistance of leaf sheath was poorer than that of leaf.

关 键 词：玉米 不同节位 叶片 叶鞘 衰老 

分 类 号：S513[农业科学—作物学]