龙眼果实发育过程中ZRs、GA和IAA含量的变化

Changes of ZRs,GA and IAA Content During Fruit Developments of Longan

研究了储良龙眼果实发育动态和果实发育期间内源细胞分裂素、赤霉素、生长素含量的变化，并探讨了它们之间的关系．研究结果表明果皮和种子中细胞分裂素含量在果实发育前期高，后期低；生长素含量在谢花后29d前很低，花后44d起上升至较高的水平；赤霉素含量在花后14、44和92d出现3次高峰，而低谷是出现在花后29和60d．根据本研究结果可推测：果实发育前期的细胞分裂与早期高的细胞分裂素含量有关；而落果可能与生长素和赤霉素含量低有关；果实发育后期快速膨大与生长素水平迅速上升有关．

Changes of endogenous gibberellins (GA4 + 7 ), cytokinin (ZRs), auxin(IAA) levels and fruit growth pattern were studied during fruit development of longan (Dimocarpus longan Lour. cv. Chuliang), and the relationships between endogenous hormones and fruit development were discussed. The results showed that the ZRs contents in skin and seed were high in the early stage of fruit development and low in the late stage; the IAA content was very low before 29 days after full bloom(DAFB) and rose to a high level after 44 DAFB; the peaks of GA4+7 were found on 14,44 and 92 DAFB, while the low content occurred on 29 and 60 DAFB, respectively. According to the results, it seemed that the high ZRs level in the early stage was correlated with cell division; low IAA and GA4+7 content might be associated with the physiological drop of longan fruits; high level of IAA might promote fruit expansion.