【摘要】 分析了荔枝花性别决定中雄蕊和雌蕊内源激素含量的动态变化 .结果发现 :雌蕊的发育与较高浓度的IAA和iPAs相关联 ;GA和ZRs的含量在较低浓度时有利于性器官发育 ,而较高浓度则抑制了对应性器官的发育 ;在败育的雄蕊或雌蕊中都含有较高浓度的ABA ,但从激素平衡的角度分析 ,促进生长物质与抑制生长物质的比值相对高时 ,即雄蕊的ABA浓度相对较低 ,雄蕊发育正常 ;当该比值相对较低时 ,即雌蕊的ABA浓度相对较高 ,雌蕊发育正常 .提出调节荔枝雌、雄花的发育不是某一种激素单独作用的结果 ,而是各种激素在时间、空间上的相互作用产生的综合效果 .图 2表 2参 17更多还原

【Abstract】 The dynamic changes of litchi pistil and stamen endogenous hormone in the process of flower sex determination were investigated. The results show that the development of pistil is related to higher concentrations of IAA and iPAs. Lower concentrations of GA and ZRs are benefit for sexual organ development while higher concentrations inhibit corresponding sexual organ development. There is relatively higher concentration of ABA in the abortive stamen or pistil. But in the aspect of hormone equilibrium, when the ratios of growth-promoting substances and inhibitory substances is relatively higher, that is, the ABA concentration of stamen is relatively lower, the stamen development is normal; contrarily, the pistil development is normal. Thus it is suggested that the regulation of sex determination of litchi flower is not the sole effect of some kind of hormone but the combined effect of all kinds of hormones’ interaction in time and in space. Fig 2, Tab 2, Ref 17更多还原