【摘要】 具自然单性结果能力的‘禾虾串’荔枝，单性结果能力，与开花前后其子房内源ＧＡｓ和ＣＴＫ水平较高以及花后ＩＡＡ持续升高，ＡＢＡ持续下降有密切关系。内源激素平衡〔ＡＢＡ／（ＩＡＡ＋ＧＡｓ＋ＣＴＫ）〕的分析也表明，禾虾串子房在开花前后具有较高水平的生长促进物质，而不具单性结果能力的‘怀枝’（大核品种）子房则含有较高水平的生长抑制物质。联系果实发育期间的内源激素变化分析了禾虾串单性果较小的原因。应用２，４－Ｄ处理不授粉（去雄套袋）荔枝子房，仅妃子笑品种成功获得诱导性单性结果更多还原

【Abstract】 The level of endogenous hormones and its fluctuation during fruit setting of two Litche cultivars, Hexiachuan and Huaizhi were compared. The results showed that there were relatively higher level of GAs and CTK in parthenocarpic fruits of Hexiachuan before and after anthesis. The increase of IAA level and the continuonsly declining level of ABA after anthesis were the possible reasons for the parthenocarpic fruit setting of Hexiachuan. We furtherly analyzed the endogenous hormone balance of ABA/(IAA+GAs+CTK). It was proved that Hexiachuan,the cultivar with capability of natural parthenocarpy,had higher level of growth promoter in the balance than the caltivar Huaizhi (normal seed) which were deficient in the capability of natural parthenocarpy. In addition,the endogenous hormones in the parthenocarpic fruit and non parthenocarpic fruit of Hexiachuan had a similar changing trends during fruit development. The spray of 2,4 D 20mg/L was applied when the stigma withered and became yellow after most flowers of the panicle blossimed. An artificially induced parthenocarpy was obtained in Litchi“Feizixiao”.更多还原