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The concrete evidence of flexistyly in Plagiostachys: pollination biology of a wild ginger on Hainan Island, China

文献类型： 外文期刊

作者： Jia, Xiao-Cheng 1 ; Li, Jia 1 ; Lu, Guo-Hui 2 ; Wang, Ying-Qiang 2 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Coconut Res Inst, Hainan Key Lab Trop Oil Crops Biol, Wenchang 571339, Hainan, Peoples R China

2.S China Normal Univ, Coll Life Sci, Guangzhou 510631, Guangdong, Peoples R China

3.S China Normal Univ, Guangdong Prov Key Lab Biotechnol Plant Dev, Guangzhou 510631, Guangdong, Peoples R China

关键词： Flexistyly;Plagiostachys austrosinensis T;L;Wu & S;J;Chen;pollination biology;Zingiberaceae

期刊名称：ECOLOGY AND EVOLUTION （ 影响因子：2.912； 五年影响因子：3.271 ）

ISSN： 2045-7758

年卷期： 2015 年 5 卷 22 期

页码：

收录情况： SCI

摘要： Flexistyly in Plagiostachys was first reported by Takano etal., while they provided no detailed study on pollination biology and breeding system. In this study, we tested this suspicion in one species of Plagiostachys (Plagiostachys austrosinensis). Field observations suggested that flexistyly was present in this species, and stigmatic behavior was similar to that reported for Alpinia and Amomum species. Two phenotypes (anaflexistylous and cataflexistylous) occurred in a ratio of 1:1 in natural populations. Anthesis began around 1530-1600h and lasted for about 24h. Pollen viability and stigma receptivity remained high throughout the flowering process. Mean nectar volume (4.15-11.30L) and mean sugar concentration (>32%) also remained at a high level during the flowering process. No fruit set occurred in unpollinated bagged plants. Two pollinators (Bombus pyrosoma and Vespidae spp.) and one pollen robber (Mutillidae spp.) were found as flower visitors. Fruit set following self-pollination and cross-pollination did not differ significantly in the cataflexistylous morph. Partial self-incompatibility was apparent in the anaflexistylous morph. These results provide the concrete evidence of flexistyly in Plagiostachys and a more thorough understanding of its evolutionary origin in gingers.

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