龙眼反季节成花过程中内源生长物质动态研究

Investigation of Endogenous Growth Substances Level Changes in off Season Flower Induction of Longan (Dimocarpus longan Lour.)Trees

以‘凤梨穗’龙眼为试验材料,用不同浓度氯酸钾诱导其反季节成花,同时测定其成花过程中内源生长物质含量的变化。结果表明:诱导龙眼反季节成花的较适宜的氯酸钾浓度为5 g/m2,浓度过高反而影响成花效果。在施用氯酸钾后龙眼顶芽乙烯(ETH)和细胞分裂素(ZT)含量显著升高,赤霉素(GA3)和脱落酸(ABA)含量有所下降,而生长素(IAA)含量变化不明显;多胺(PAs)中的亚精胺(Spd)含量显著升高,精胺(Spm)含量下降,腐胺(Put)含量变化不明显;水杨酸(SA)含量则明显提高;表明龙眼成花需要高含量的ETH、ZT、Spd和SA,以及低水平的GA3、ABA和Spm。

Potassium chlorate（KClO3）treatments were used to promote flowering in longan plants, and investigate the changes of the endogenous growth substances. Analysis showed that ethylene （ETH）and zeatin （ZT）increased obviously while gibberelline（GA3）and abseisin acid（ABA）decreased, indole-3-acetie acid（IAA）changed slightly. Contents of spermidine （Spd）and salicylic acid （SA）increased significantly while spermine （Spin）decreased, putrescine（Put）ehanged slightly. The analytical results indicated that high ETH, ZT, Spd, SA levels and low levels of GA3, ABA and Spm in the longan shoot tips contributed to flower bud induction.