草业学报2012，Vol.21Issue(6)：102-107,6.
干旱胁迫对紫花苜蓿叶片和根系多胺代谢的影响
Effect of drought stress on polyamine metabolism in the leaves and roots of alfalfa
摘要
Abstract
Changes in the contents of endogenous polyamines (PAs) and the activities of metabolic enzyme in the leaves and roots of alfalfa under drought stress were studied to clarify the theoretical role of polyamine metabolism in alfalfa drought-resistance. The contents of PAs (Putrescine, Spermidine, Spermine) and the activities of ADC, ODC and PAO in the leaves and roots of alfalfa initially increased but then decreased with time. With drought stress intensification, the rising amplitude of PAs content and the activities of ADC and ODC increased. There was a significant positive correlation between Put content and the activities of ADC and ODC in the leaves and roots, suggesting that both ADC and ODC were the major pathways of Put biosynthesis in alfalfa under drought stress. Moreover, it indicated that there was a significant positive correlation not only between PA (Spd and Spm) contents and PAO activity in the leaves and roots of alfalfa but with polyamine metabolism in the leaves and roots as well. There was a close relationship between polyamine metabolism and alfalfa drought-resistance.关键词
紫花苜蓿/干旱胁迫/多胺/酶活性/抗旱性Key words
alfalfa/ drought stress/ polyamine/ enzyme activity/ drought-resistance分类
农业科技引用本文复制引用
刘义,张春梅,谢晓蓉,闫芳,胡丹..干旱胁迫对紫花苜蓿叶片和根系多胺代谢的影响[J].草业学报,2012,21(6):102-107,6.基金项目
甘肃省科技支撑项目(1011NKCG064)资助. （1011NKCG064）
