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《JOURNAL OF WUHAN BOTANICAL RESEARCH》 1997-03
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THE FLORAL BIOLOGY AND ITS EVOLUTIONARY SIGNIFICANCE OF SINOPODOPHYLLUM HEXANDRUM(ROYLE) YING(BERBERIDACEAE)

Xu Zhengyao Ma Shaobin Hu Changping Yang Caiyun Hu Zhihao(Departme,lt of Biology, Yunllan Unit,ersity Kunming 650091 )  
The floral biology of nine populations of SinOPOdophyllum hexandrum (Royle)Ying(Berberaceae) (Ximalaya mayapple ) in Zhongdian area,Yunnan Province,has beenstudied. The results are presented as follows: (l ) It has been observed that Ximalayamayapple has a very special pollination mechanism which adapts to autogamy. When theflower is under blossom or just in blossom,the gynoecium is upright. When the flower isin full blossom,however,the gynoecium takes place a turning and makes the whole gynoecium close to a certain anther. The stigma thus contacts with the anther and pollination occurs. After pollination,the gynoecium recovers to upright. The whole pollinationprocess lasts about 4-6 hours. (2)The reproductive rhythm of the plant is quite fast,from the meiosis of spore--mother cell to the termination of double fertilization,it takesonly about 4-6 days. Fruit--bearing rate is almost 100%,seedset ratio is 97. 32 %. (3)Ximalaya mayapple has a strong differentiation within species and shows its diversity inboth morphology and ecological adaptation. The plant is,therefore,believed to be with alarge present fitness.
【Fund】: 中国科学院昆明植物研究所“生物多样性及生物地理学”开放实验室研究基金
【CateGory Index】: Q941
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