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不同基因型荞麦生育后期叶片衰老特性研究
引用本文:巩巧玲,冯佰利,高金锋,高小丽,王鹏科,柴岩.不同基因型荞麦生育后期叶片衰老特性研究[J].干旱地区农业研究,2008,26(5):27-31.
作者姓名:巩巧玲  冯佰利  高金锋  高小丽  王鹏科  柴岩
作者单位:西北农林科技大学小宗粮豆研究中心,陕西,杨凌,712100
基金项目:科技部科技支撑计划,国家高技术研究发展计划(863计划),国家星火计划,西北农林科技大学校科研和教改项目
摘    要:大田条件下试验观测甜荞西农9976和苦荞西农9920两种不同基因型荞麦开花至成熟期闻主茎叶片衰老特性.结果表明,不同基因型荞麦叶片衰老进程存在着明显差异.与甜荞西农9976相比,苦荞西农9920生育后期功能叶片的叶绿素含量和可溶性蛋白质含量下降幅度小,SOD、CAT活性下降缓慢,MDA含量增加幅度小,叶片功能期长,衰老慢,有助于光合产物的积累.生产实践中,有效控制或延缓荞麦开花节叶片的衰老进程,延长叶片功能期,对提高荞麦产量有十分重要的作用.

关 键 词:荞麦  叶片衰老  保护酶活性

Leaf senescence of different buckwheat genotypes at later growing stage
GONG Qiaoling,FENG Baili,GAO Jinfeng,GAO Xiaoli,WANG Pengke,CHAI Yan.Leaf senescence of different buckwheat genotypes at later growing stage[J].Agricultural Research in the Arid Areas,2008,26(5):27-31.
Authors:GONG Qiaoling  FENG Baili  GAO Jinfeng  GAO Xiaoli  WANG Pengke  CHAI Yan
Institution:Research Center for Minor Cereals and Beans, Northwest A & F University, Yangling, Shaanxi 712100, China
Abstract:Two different buckwheat genotypes were used to study characteristics of the leaf senescence at flower-set caulis nodes from flowering to maturing under field conditions.A significant difference of senescence progresses between two genotypes was showed as: compared to Xinong9920(Common buckwheat),Xinong9976(Tartary buckwheat) has a slower reduction in the content of chlorophyll and soluble protein,and also in the activities of SOD and CAT,while a slower increasing MDA's content;These variations in leaf result in prolonging the function durations,delaying senescence,and contribute to accumulation of photosynthetic products.
Keywords:buckwheat  leaf senescence  protective enzyme activity
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