Thrips pollination of the central Australian cycad, Macrozamia macdonnellii (Cycadales)
Thrips pollination of the central Australian cycad, Macrozamia macdonnellii (Cycadales)
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DOI：
10.1086/317899
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发表时间：
2001-01-01
影响因子：
2.3
通讯作者：
Terry, I
中科院分区：
文献类型：
--
作者：
Mound, LA;Terry, I
Macrozamia macdonnellii（Zamiaceae）生长在澳大利亚中部的几个偏僻地点。雄性球果支持大量的宿主特异性蓟马（Cycadothrips albrechti n）。 sp。 （缨翅目，风蓟马科）。这种昆虫只在这些雄性球果中繁殖，随着气温下降和湿度上升，成虫会在下午晚些时候从雄性球果中蜂拥而出。一个雌球果上的一个小粘性陷阱在一个下午就捕获了 3844 只成虫；观察到大量蓟马进入该锥体。每只蓟马平均携带 15 个花粉粒，因此估计每个胚珠平均输送超过 5500 个花粉粒。在这些苏铁植物上没有发现其他潜在的传粉媒介，因此得出结论，C. albrechti 是 M. macdonnellii 的唯一传粉媒介。由于苏铁蓟马构成缨翅目中的一个基础分支，因此认为蓟马可能在开花植物辐射之前参与了花粉转移。
Macrozamia macdonnellii (Zamiaceae) grows at a few isolated sites in central Australia. Male cones support large populations of a host-specific thrips, Cycadothrips albrechti n. sp. (Thysanoptera, Aeolothripidae). This insect breeds only in these male cones, from which the adults swarm in late afternoon as the temperature falls and humidity rises. A small sticky trap at one female cone caught 3844 adults on a single afternoon; large numbers of thrips were observed entering this cone. Each thrips carried an average of 15 pollen grains, and pollen delivery into the cone was thus estimated to average more than 5500 grains per ovule. No other potential pollinators were found on these cycads, and it is concluded that C. albrechti is the sole pollinator of M. macdonnellii. Since Cycadothrips constitutes a basal clade within the Thysanoptera, the possibility is considered that thrips were involved in pollen transfer before the radiation of flowering plants.