分蘖期水分胁迫对水稻生长及多胺含量的影响

Effect of Water Stress on Growth and Polyamines Contents at Rice Tillering Stage

以旱116为材料,研究分蘖期水分胁迫对水稻生长及多胺含量的影响及与后期产量的关系.结果表明:水分胁迫影响叶绿素含量,株高相对增长速率及分蘖数的相对增长速率,通过回归分析,只有分蘖数的相对增长速率被引入方程;在外源精胺(Spm)的处理下,水稻抗旱系数显著增加,叶片中腐胺(Put)、亚精胺(Spd)和精胺(Spm)含量明显上升;在外源鸟嘌呤腙(MGBG)的处理下,水稻抗旱系数明显减小,叶片中Spd及Spm含量明显下降,通过相关分析,叶片中Put、Spd及Spm含量分别与抗旱系数及分蘖数的相对增长速率呈极显著正相关,叶片中Put、Spd及Spm含量与后期产量密切相关.

Rice cultivating of Han116 was used as the experimental material.The relationship between production and rice growth and polyamine content at tillering stage under water stress was studied. The results showed chlorophyll content, height relative growth rate and tillering number relative increasing rate were effected under water stress. Through regression analysis,only tillering number relative increasing rate was led into equation. Under exogenous Spm treatment ,yield maintenance ratio of rice and Put, Spd and Spin contents in leaves significantly increased. Under exogenous MGBG treatment ,yield maintenance ratio of rice and Spd, Spin contents in leaves significantly decreased. By meams of correlation analysis, it showed highly significant positive correlation between Put,Spd and Spm contents and yield maintenance ratio and tillering number relative increasing rate. It indicated that Put Spd and Spm contents in leaves closely related to post-production.