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首页> 外文期刊>Ecological research >The reproductive biology of two understory plants in the Atlantic rain forest, Brazil
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The reproductive biology of two understory plants in the Atlantic rain forest, Brazil

机译：巴西大西洋雨林中两种林下植物的生殖生物学

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摘要

Outcrossing and sexual reproduction of most flowering plants depends on pollinators. Plant traits likely to be involved in pollinator attraction include flower color, shape, and size. Furthermore, plant or flower density and the temporal flowering pattern may have an effect on reproduction. In this study, we examine the pollination ecology, breeding system, female reproductive output, and germination of two tropical understory species, Stenostephanus lobeliiformis (Acanthaceae) and Besleria melancholica (Gesneriaceae), which differ in these traits. Pollinator observations revealed that the dense flowering S. lobeliiformis with pinkish flowers received a higher diversity of pollinators, but visitor frequency measured as visits per flower per hour was much less (0.1 h~(-1)) than that to B. melancholica, which has a smaller floral display of dull-colored flowers (1.5 h~(-1)). Pollination experiments revealed that S. lobeliiformis but not B. melancholica is pollen-limited. In addition, both species are partially self-incompatible and depend on pollinators for outcrossing. Natural fruit set of open-pollinated unmanipulated flowers (control treatment) in both species is 22-26 %. Germination studies indicated inbreeding depression in S. lobeliiformis. We conclude that the pollination ecology of these species is influenced by a broad set of traits and that very different combinations of these traits can be successful in terms of reproduction.
机译：大多数开花植物的异交和有性繁殖取决于传粉媒介。可能与传粉媒介吸引力有关的植物性状包括花朵的颜色，形状和大小。此外，植物或花朵的密度和暂时的开花模式可能会对繁殖产生影响。在这项研究中，我们研究了两种热带林下种的花粉传粉生态学，育种系统，雌性繁殖产量和发芽率，这两种特质在这些特质上有所不同。授粉媒介的观察表明，密集的开花的带粉红色花朵的S. lobeliiformis的授粉媒介多样性更高，但以每朵花每小时的拜访次数来衡量的拜访者频率（0.1 h〜（-1））要比黑芥子（B. melancholica）少得多。具有较小的暗花花卉展示（1.5 h〜（-1））。授粉实验表明，沙门氏菌而不是忧郁芽孢杆菌是受花粉限制的。此外，这两种物种都部分自交不亲和，并且依赖传粉媒介进行异源杂交。在两种物种中，未授粉的未授粉花的自然果实集（对照处理）为22-26％。萌发研究表明，在近交链球菌中近交抑制。我们得出的结论是，这些物种的授粉生态受一系列广泛的性状影响，并且这些性状的非常不同的组合可以成功繁殖。

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