Male-biased sex ratio and promiscuous pollination in the dioecious island treeLaurus azorica (Lauraceae)
Male-biased sex ratio and promiscuous pollination in the dioecious island treeLaurus azorica (Lauraceae)
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雌雄异体岛树Laurus azorica（樟科）中雄性偏重的性别比和杂乱授粉
DOI：
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发表时间：
1998
影响因子：
1.9
通讯作者：
J. Olesen
中科院分区：
文献类型：
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作者：
Anne;J. Olesen
对樟科（Lauraceae）的雌雄异株的Macaronesian乔木Laurus azorica的花粉进行了研究。雌雄株大小分布相同。种群中雄树的数量是雌树的2.5倍。此外，雄性产生更多的花，他们的花序持续时间更长。个体花寿命和花期长度在两性中是相同的。在多年的观察中，一棵树改变了性别。传粉者为Halictinae蜜蜂和Tachina canariensis。蜜蜂收集花粉和花蜜，苍蝇收集两性的花蜜。这两个物种也访问了其他植物。讨论了樟科植物育种系统的演化。
Pollination ofLaurus azorica (Lauraceae), a dioecious Macaronesian tree, was studied. Male and female trees had the same size distribution. The population had 2.5 times as many male trees as females. In addition, males produced more flowers, and their inflorescences lasted longer. Individual flower lifetime and length of flowering season were the same in both sexes. Between the years of observation, one tree changed sex. Pollinators wereHalictinae bees and the flyTachina canariensis. The bees collected pollen and nectar and the fly collected nectar from both sexes. Both species visited other plants as well. The evolution of breeding systems inLauraceae is discussed.