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首页> 外文期刊>Botanica Helvetica >Mating System Of Helianthemum Squamatum (cistaceae), A Gypsophile Specialist Of Semi-arid Mediterranean Environments
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Mating System Of Helianthemum Squamatum (cistaceae), A Gypsophile Specialist Of Semi-arid Mediterranean Environments

机译：半干旱地中海环境的嗜糖性专家Helianthemum Squamatum（cistaceae）的交配系统

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摘要

Plants living on gypsum have received remarkably little study, despite being one of the most important groups of endemic and rare plants in arid and semi-arid regions. This work is among the first to study the mating system of a gypsophyte, Helianthemum squamatum (Cistaceae), which is a short-lived perennial endemic to gypsum habitats of the Iberian Peninsula. We carried out a hand-pollination experiment, considering the following pollination treatments: autogamy, geitonogamy, xenogamy and control (open-pollination). Generalized linear mixed models were fitted to evaluate the effect of the treatment on the fruit set and the number of viable seeds yielded per fruit. Both response variables were significantly higher in the xenogamy treatment than in the autogamy and geitonogamy treatments. No significant differences were detected between the xenogamy treatment and the control group, indicating that H. squamatum is mainly an outcrosser although partially self-compatible. Our results also suggest that pollen limitation may only slightly affect the reproductive success of H. squamatum. In contrast with the general tendency towards self-compatibility previously described in short-lived species of the Cistaceae, this outcrossing mating system resembles the one of long-lived perennials.%de pollen n'est pas un facteur limitant la reproduction, même dans un habitat aussi fragmenté. Il apparaît ainsi que le système de reproduction d'H. squamatum diffère de celui de ses congénères à cycle de vie court et se rapproche davantage de celui des autres Cistaceae arbustives longévives.
机译：尽管在干旱和半干旱地区，生活在石膏上的植物是地方性和稀有植物的最重要组之一，但对其的研究却很少。这项工作是第一个研究石膏鳞茎（Cistaceae）交配系统的植物，鳞茎鳞茎是伊比利亚半岛石膏生境的一种短暂的多年生地方特有种。我们进行了人工授粉实验，考虑了以下授粉处理方法：同卵配子，geitonogamy，异种配偶和控制（开放授粉）。拟合了广义线性混合模型以评估处理对坐果的影响以及每个果实产生的可行种子的数量。异种配伍处理中的两个反应变量均显着高于同族配种和基因配子处理。在异种配伍处理与对照组之间未检测到显着差异，表明鳞茎隐球菌主要是异型杂交，尽管部分自相容。我们的结果还表明，花粉限制可能只会轻微影响鳞球菌的繁殖成功。与先前在长寿树科植物中描述的自我适应的普遍趋势形成鲜明对比的是，这种异交系统类似于多年生的多年生植物之一。花粉无限制繁殖栖息地澳大利亚碎片。再现性的系统Cistaceae的火药可以长期保存，而且可以在法院，法院，法院，法院和法院之间处理。

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