植物生长调节剂对龙眼内源激素及花芽分化的影响

EFFECTS OF PLANT GROWTH REGULATORS ON ENDOGENOUS HORMONES AND BUD DIFFERENTIATION OF LONGAN

研究了ＰＰ３３３和ＧＡ对龙眼（ＤｉｍｏｃａｒｐｕｓｌｏｎｇａｎａＬｏｕｒ．）成花的作用及其与内源激素的关系。结果表明：ＰＰ３３３处理后，ｉＰＡ含量明显高于ＧＡ的处理，而ＧＡ含量则呈现由高到低逐渐下降的趋势；ＧＡ处理正好相反；ＰＰ３３３处理后芽中的ＡＢＡ含量明显低于ＧＡ处理。表明高含量的ＧＡ和ＡＢＡ不利于花芽分化，而高含量的细胞分裂素则有利于花芽分化。外施ＰＰ３３３可缩短花序长度，提高着果率和增加产量。

This paper deals with the effects of PP333 and GA on bud formation of Longan and relation to endogenous hormones. Results showed that the content of ipA in buds of Longan treated with PP333 was obviously higher than that treated with GA, while the content of GA was gradually decreased from high to low. The both contents treated with GA were contrary. The content of ABA in buds treated with PP333 was lower than that treated with GA. It indicated that high contents of GA and ABA were disadvantageous to bud differentiation and high content of cytokinin(ipA) in buds was advantageous to bud differentiation. Spraying of PP333 could shorten the longth of inflorescence and increase the fruit set and yield.