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首页> 外文期刊>Anais da Academia Brasileira de Ciencias >Wind pollination and propagule formation inRhizophora mangle L. (Rhizophoraceae): resource or pollination limitation?
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Wind pollination and propagule formation inRhizophora mangle L. (Rhizophoraceae): resource or pollination limitation?

机译：曼氏根瘤菌（Rhizophora mangle L.）的风传粉和繁殖体形成：资源或授粉限制？

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摘要

Rhizophora mangle is considered as a self-compatible mangrove, and is pollinated by wind and insects. However, there is no information about fruit production by autogamy and agamospermy and on the foraging behavior of its flower visitors. Hence, the present study analyzed the pollination and reproductive systems of R. mangle in a mangrove community in northern Pernambuco, Brazil. Floral morphology, sequence of anthesis, and behavior of flower visitors were described; the proportion of flowers that resulted in mature propagules was also recorded. Autogamy, agamospermy, and wind pollination tests were performed, and a new anemophily index is proposed. The flowers of R. mangle are hermaphrodite, protandric, and have high P/O rate. Flies were observed on flowers only during the male phase, probably feeding on mites that consume pollen. Rhizophora mangle is not agamospermic and its fruit production rate by spontaneous self-pollination is low (2.56%) compared to wind pollination (19.44%). The anemophily index was high 0.98, and thus it was considered as a good indicator. Only 13.79% of the flowers formed mature propagules. The early stages of fruit development are the most critical and susceptible to predation.Rhizophora mangle is, therefore, exclusively anemophilous in the study area and the propagule dispersal seems to be limited by herbivory.
机译：根瘤菌被认为是一种自相容的红树林，被风和昆虫授粉。但是，没有关于通过同卵异型和无子植物生产水果及其花客觅食行为的信息。因此，本研究分析了巴西伯南布哥州北部一个红树林社区中的曼格氏菌的授粉和生殖系统。描述了花的形态，花序和花访者的行为。还记录了导致繁殖体成熟的花朵比例。进行了自动配子，无精子和风授粉试验，并提出了新的厌氧指数。 R. mangle的花朵是雌雄同体，原色，并且具有较高的P / O率。仅在雄性阶段才在花上观察到苍蝇，可能以消耗花粉的螨虫为食。根瘤菌不是无精子的，通过自然自花授粉的果实生产率比风授粉（19.44％）低（2.56％）。嗜血性指数高至0.98，因此被认为是一个很好的指标。仅13.79％的花形成了成熟的繁殖体。果实发育的早期阶段是最关键的，并且容易被捕食。因此，根瘤菌在研究区域中完全是嗜性的，繁殖体的扩散似乎受到草食性的限制。

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