遮荫对野生大百合叶片内源激素含量的影响

试验研究了在花茎抽生期对野生大百合遮荫后,其在成花过程中叶片内源激素的变化趋势.结果表明:不同遮荫条件下的大百合叶片的IAA,GA3和ABA含量变化趋势基本一致,IAA与GA3在花茎抽生期含量最高,其后呈下降趋势,而ABA的变化趋势恰好相反;较高比值的ABA/GA23与ABA/IAA,均有利于成花;遮荫程度越高IAA含量越高,ABA含量越低,其开花率也越高,花期越长,对照则因不能正常生长,激素的变化趋势与处理不一致.

Effects of Shading on Endogenous Hormone of Cardiocrinum Giganteum

Endogenous hormone contents in leaf were investigated during flower formation after 10 days shading from flower bolting stage.The results showed that each of the endogenous hormones had the same changes in different shading treatments.The content of endogenous IAA and GA3 reached their highest contents in the flower bolting stage,and decreased significantly after it,then reduced slowly.The ABA content in leaves increased dramatically with a maximum value at the stage of flower withering.It is suggested that higher ABA/GA3 and ABA/IAA were required in bud formation.The ABA content decreased as the intensity of illumination decreased,but the opened flower percentage,flowering days and the IAA content increased.The changes of endogenous hormones of Cardiocrinum Giganteum on the natural light were totally different with the shading ones,as it can't grow normally.