水分胁迫下水稻幼苗多胺含量变化与抗旱性的关系

以籼稻品种旱116、湘早籼32号为材料,不同质量分数(0%、5%、10%、15%、20%、25%)聚乙二醇(PEG6000)模拟自然干旱,研究水分胁迫下水稻腐胺(Put)、亚精胺(Spd)、精胺(Spm)含量的变化与抗旱性的关系.结果表明:水分胁迫下水稻幼苗Put、Spd和Spm含量明显上升,且旱116的上升幅度明显大于湘早籼32号,Put、Spd和Spm含量与根冠比呈正相关.回归分析结果表明,Put对湘早籼32号地上部干重,Spd对旱116地上部及湘早籼32号根部干重,Spm对旱116和湘早籼32号根部干重影响显著.

TRelationship between change of polyamine contents and drought-resistance in rice seedlings under water stress

Indica rice cultivars of Han116 and Xiangzaoxian32 were used as experimental materials with different concentration (0%, 5%, 10%, 15%, 20%, 25%)PEG6000, the relationship between change of polyamine contents and drought-resistance in rice seedlings under water stress was investigated. The results showed the contents of Put, Spd and Spm significantly increased under water stress, Han116 increased more markedly than Xiangzaoxian32, which was a positive Coγrelation between Put, Spd and Spm contents and root/shoot. Through regression analysis, Put, Spd and Spm were respectively led into by y_1=1.248E-04x_1+0.272, y_1=1.421E-05_x_2+0.240, y_2=-1.55E-05_x_2+4.922E-04_x_3+0.126, y_2=4.679E-04_x_3+3.923E-02 equations(x_1, x_2, x_3 respectively mean Put, Spd and Spm ,y_1 , y_2 respectively mean shoot and root dry weight ).