摘要
在花生幼苗期进行浅水水淹处理,运用生理生化和形态发育指标测定不同花生品种幼苗的耐涝性。结果表明,涝渍时各花生品种的根系乙醇脱氢酶(ADH)活性即乙醇发酵均有大幅增加,这在短期内表现为一定的适应性(厌氧呼吸供能),但也是根系乙醇积累伤害的原因之一,尤其高速率的乙醇发酵与花生品种的长期淹涝敏感性有关。涝渍时花生根系发育受限,品种间根系发育情况差异很大。ADH酶活性与根鲜重呈显著负相关。凭借花生根系生长发育指标如颜色、鲜重,以及ADH酶活性高低与变化等生化机制,可判别花生耐涝性强弱。综合来看,幼苗期耐淹涝性以中花5号、花311较强,其次是花119、豫花15号,而花269、花55弱。
Waterlogging tolerance of seedlings of various peanut was estimated with physiological and biochemical indexes. The results indicated that the activitlty of alcohol dehydroganase（ ADH） i.e. ethanol fermentation of all peanut varieties increased at large scale. It showed definite adaptation to watertogging in short term （power supply by anaerobic respiration）, yet one of the reasons of damage by ethanol accumulation, espically high rate of ethanol fermentation was related to susceptivity to waterlogging. Roots development, which showed great difference between varieties, was inhibited. There a remarkable inverse correlation between ADH activity and the root fresh weight. Waterlogging tolerance, therefore, could be determined resorting to root system growth and development indexes such as color and fresh weight which embodied certain biochemical mechanism i.e. changes of ADH activity. Comprehensively, Zhonghua5, Hua311 showed strong tolerance to waterlogging, following with Huall9 and Yuhua15, whereas Hua269, Hua55 showed weak tolerance
出处
《花生学报》
2007年第4期12-17,共6页
Journal of Peanut Science
基金
"十一五"国家科技支撑计划课题"高产优质特用花生育种技术研究及新品种选育"(2006BAD01A04)
湖南农业大学引进人才项目(2005YJ12)
关键词
花生
根系
耐涝性
乙醇脱氢酶
乙醇发酵
peanut
roots
waterlogging tolerance： alcohol dchydrogenase
ethanol fermentation
