摘要
以三年生枳砧兴津温州蜜柑盆栽苗为试材,研究落花末期高温胁迫对幼果脱落、乙烯生成以及内源多胺水平的影响.结果表明:高温胁迫增加了乙烯的生成,并加速了幼果的脱落;内源多胺水平对高温很敏感,其含量变化与乙烯生成、幼果脱落之间均呈显著负相关,相关系数分别为r=-0.7567~*和r=-0.8640~*.内源多胺水平可能在乙烯生物合成和幼果脱落过程中起重要的调节作用.
Three-year-old potted Citrus unshiu Marc, trees were used to investigate the influence of high temperature stress on the endogenous polyamine content,ethylene production and fruit drop. High temperature-stress markedly promoted the production of ethylene and increased the percentage of fruit drop. It was found that endogenous polyamine content was high sensitive to high temperature stress,and there was a significant negative relationship hetween endogenous polyamine content and both ethylene production and fruit drop, the correlation coefficients being r= - 0. 7567 and r= - 0. 8640 respectively. Thus we believed that the level of endogenous polyamine played an importent role in regulating ethylene production and fruit retention.
基金
国家自然科学基金
关键词
温州蜜柑
高温胁迫
生理
Citrus unshiu Marc,
high temperature stress
physiological basis
