蕉柑幼果内源激素和多胺的消长与种子败育的关系

从幼果生理活性物质消长方面对蕉柑少籽原因进行分析．结果表明：（１）内源生长调节物相对含量、多胺总量和精胺（Ｓｐｍ）水平与胚珠败育有关，内源吲哚乙酸（ＩＡＡ）、脱落酸（ＡＢＡ）含量，ＡＢＡ／ＩＡＡ比值，腐胺（Ｐｕｔ）、亚精胺（Ｓｐｄ）水平均与胚珠败育及珠心胚的发生发育有一定联系，它们的曲线都在胚珠败育或珠心胚发生的关键时刻出现折点，尤其是ＡＢＡ／ＩＡＡ比值变化最为突出，说明激素间的平衡对调控胚珠发育起了重要作用；（２）内源生长调节物除ＩＡＡ、ＡＢＡ外，还要注意酚类物质和ＧＡ的作用；（３）ＩＡＡ含量受过氧化物酶（ＰＯＤ）和吲哚乙酸氧化酶活性影响少，而基本上和总酚含量呈负相关．

The dynamics of endogenous growth regulators and polyamines in young fruits of Jiaogan and their relationships to seed abortion

In this experiment, a further study was conducted on sterility of Jiaogan(Citrus tankan Tanaka) in the aspects of decrease and increase in physiological active substances in young fruits. The results were as follows: showed that, (1) the relative concentration of endogenous growth regulators,the total concentration of polyamines and the level of Spermine(Spm) were related to ovules abortion; the concentration of endogenous IAA and ABA, the ratio of ABA/IAA and the level of putrescine (Put) and Spermidine(Spd) were related to ovules abortion and nucellar embryos′ originating and developing; the turning point of their curves appeared at the crucial time of ovules abortion beginning or nucellar embryos originating; the variation in the ratio of ABA/IAA, especially, was distinct, showing that the balance of hormones was critical to regulating the development of ovules and nucellar embryos; (2) endogenous growth regulators included other kinds of growth substances besides IAA and ABA,the role of phenol and GA could not be neglected; (3)the content of IAA was little affected by peroxidase and IAA oxidase, but was negatively correlated to the total content of phenol.