反季节杧果花器官结构对胚胎败育的影响

目的]研究反季节杧果花器官结构对胚胎败育的影响。方法]观察反季节杧果生产中花器官和胚胎的结构,探索反季节杧果胚胎败育过程中"金煌"品种的细胞学结构变化,研究胚胎败育的细胞学机理。结果]"金煌"雄蕊退化,花粉囊间发育差异十分显著,花粉囊小的花粉数量少,而花粉囊大的花粉数量多且发育至成熟,仅有少部分花粉囊的花粉退化,花粉生活力为76.9%。雌器官出现子房萎缩变形、胚珠横生现象;胚珠周围的输导组织断裂现象普遍;在胚囊8核期间,在同一或不同胚珠中出现极核细胞消失或者退化,反足细胞个别退化、助细胞个别或者全部退化的现象。结论]以上因素都会影响胚珠受精,引起授粉受精不良。

Effects of Floral Structure on the Embryo Abortion of the Anti-season Mango

Objective]To research the effects of floral structure on the embryo abortion of the anti-season mango.Method] We observed the flo-ral organ and embryo structure of anti-season mango,explored the changes of cytology structure of mango cultivar Jinhuang druing embryo abor-tion,and researched the cytological mechanism of embryo abortion.Result]Jinhuang showed stamen degeneration,there were significant differ-ences in anther development,the bigger anther possessed the more pollen quantity with higher maturity.Only a few pollen in sac showed degener-ation. Pollen activity was 76.9%.In female organs,there were phenomena of ovary atrophy and hemitropous ovule;and the broken transmission tissue was common around the conducting tissue.When the megaspore developed in stage of eight nucleolus,polar nucleus cell disappeared or de-generated in the same or different ovules.Conclusion] All these factors might affect the fertilization of the ovule,and lead to poor pollination and fertilization.