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首页> 外文期刊>Southeastern naturalist >Pollen Limitation and Self-Compatibility in Three Pine Savanna Herbs
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Pollen Limitation and Self-Compatibility in Three Pine Savanna Herbs

机译：花粉限制和三个松草草药中的自相互态

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摘要

There is substantial interest in the restoration of the Pinus palustris (Longleaf Pine) savannas in the southeastern US Coastal Plain, one of the most endangered ecosystems in the world and also home to a diverse plant assemblage. Better understanding of the pollination ecology of these plants is necessary for their successful conservation and restoration. In this study, we assessed the rates of self-compatibility and pollen limitation in Carphephorus bellidifolius (Sandywoods Chaffhead), Liatris squarrulosa (Appalachian Blazing Star), and Aristida beyrichiana (Wiregrass)-3 perennial understory herbaceous species of conservation interest. We measured self-compatibility with a pollination-exclusion-bag experiment and pollen limitation with a pollen-supplementation experiment within South Carolina populations. We found no evidence of pollen limitation in any of these 3 species. This result is surprising given the high incidence of pollen limitation typically found in other study systems. Our pollination-exclusion bag experiment showed that Sandywoods Chaffhead likely requires out-cross pollen for successful pollination, whereas both Appalachian Blazing Star and Wiregrass appear to exhibit at least low levels of self-compatibility. Taken together. our results may indicate that the active management of the Longleaf Pine ecosystem with prescribed fire and overstory tree removal has supported sufficient pollination in these plant populations.
机译：对沿海沿海平原东南部的Pinus Palustris（Longleaf Pine）大草原的恢复有很大的兴趣，世界上最濒危的生态系统之一，也是多元化的植物组合。更好地了解这些植物的授粉生态学是他们的成功保护和恢复所必需的。在这项研究中，我们评估了Carphorphorus Bellidifolius（Sandywoods Chaffhead），洛杉矶Squarrulosa（Appalachian Blazing Star）的自我相容性和花粉限制，以及Aristida Beyrichiana（Wiulgrass）-3多年生植物的植物保护兴趣。我们对南卡罗来纳州群体的花粉补充试验进行了与授粉排除袋实验和花粉限制的自相容性。我们发现这些3种中的任何一种没有有关花粉限制的证据。考虑到通常在其他研究系统中发现的花粉限制的高发病率，这种结果令人惊讶。我们的授粉 - 排除袋实验表明，桑迪伍德Chaffhefe可能需要出交过交叉花粉，以便成功授粉，而Appalachian Blazing Star和Wiulgrass似乎至少表现出至少低水平的自相容性。一起。我们的研究结果可能表明，具有规定的火灾和疏散树去除的Longleaf松果生态系统的积极管理在这些植物群中支持了足够的授粉。

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