Differentiation in a tropical deceptive orchid: colour polymorphism and beyond
Differentiation in a tropical deceptive orchid: colour polymorphism and beyond
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DOI：
10.1007/s00606-010-0344-8
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发表时间：
2010-09
影响因子：
1.9
通讯作者：
N. Juillet;Roxane Delle-Vedove;L. Dormont;B. Schatz;T. Pailler
中科院分区：
文献类型：
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作者：
N. Juillet;Roxane Delle-Vedove;L. Dormont;B. Schatz;T. Pailler
颜色多态性经常在欺骗性兰花物种的个体中被描述，并且一些研究调查了颜色变形之间的繁殖成功率差异。然而，在之前的研究中，颜色变形是否在其他性状上有所不同很少受到关注。在这里，我们报告了留尼汪岛的一种热带欺骗性兰花的案例，它表现出三种不同的颜色品种。我们研究了颜色品种之间的性状变异模式，发现花和花序形态存在显着差异。有趣的是，我们发现大多数种群仅包含单一品种的个体，并且品种之间在空间分布和开花物候方面存在很大差异。这种情况不同于之前报道的欺骗性兰花的花多态性案例，其中颜色变形同时发生并在同一群体中开花。开花的时空变化表明颜色品种具有独立的繁殖生态并适应当地条件。我们认为，传粉媒介物种丰度或多样性的潜在变化以及群落中产花蜜物种的共现可能推动了每个品种对其当前授粉生态位的适应。
Colour polymorphism has often been described among individuals of deceptive orchid species, and several studies have investigated reproductive success variations among colour morphs. However, whether colour morphs differed in other traits has received little attention in previous studies. Here, we report the case of a tropical deceptive orchid in Reunion Island that exhibits three different colour varieties. We investigated patterns of trait variation among colour varieties and found significant differences in floral and inflorescence morphology. Interestingly, we found that most populations included only individuals of a single variety, and that strong differences exist among varieties in spatial distribution and flowering phenology. This situation differs from previously reported cases of floral polymorphism in deceptive orchids where colour morphs co-occur and flower in the same populations. The spatio-temporal variation in flowering suggests that colour varieties have independent reproductive ecologies and are adapted to local conditions. We propose that potential variations in pollinator species abundance or diversity and the co-occurrence of nectar-producing species in the community may have driven the adaptation of each variety to its current pollination niche.