Green greenhouse: leaf enclosure for fruit development of an androdioecious vine, Schizopepon bryoniifolius
Green greenhouse: leaf enclosure for fruit development of an androdioecious vine, Schizopepon bryoniifolius
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DOI：
10.1098/rspb.2020.1718
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发表时间：
2020-10
期刊：
影响因子：
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通讯作者：
Nobuyuki Nagaoka;S. Naoe;Yu Takano-Masuya;S. Sakai
中科院分区：
文献类型：
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作者：
Nobuyuki Nagaoka;S. Naoe;Yu Takano-Masuya;S. Sakai
每一种植物的叶片在大小、形态和许多其他特征上都有很大的差异。然而，叶子在生殖过程中发挥特殊作用的报道很少。在这里，我们报告了一年生藤本植物--裂谷裂殖子的叶片，它专门包裹果串并提高种子产量。围栏叶是在晚秋生长季节结束时产生的。它们在绿度和结构上与其他树叶不同。在太阳辐射下，完整的围栏内的环境温度比被移除围栏叶片的果串高出4.6℃。我们发现，在较冷的地方，围栏更厚。去除封闭叶片对果实的存活和/或生长有负面影响，但我们无法确定确切的机制。结果表明，围栏允许植物在生命结束时遇到的寒冷天气下产生种子。植物的营养性状和生殖性状通常是分开研究的。这项研究表明了它们是如何动态相互作用的，正如对叶片和生殖性状之间的关联的检查所显示的那样，根据生活期的变化。
Individual plants can produce leaves that differ substantially in size, morphology and many other traits. However, leaves that play a specific role in reproduction have rarely been reported. Here, we report leaves specialized to enclose fruit clusters and enhance seed production in an annual vine, Schizopepon bryoniifolius. Enclosure leaves were produced at the end of the growing season in late autumn. They were different in greenness and structure from other leaves. Under solar radiation, the ambient temperature inside an intact enclosure was up to 4.6°C higher than that near a fruit cluster whose enclosure leaves had been removed. We found that enclosures were thicker at colder sites. Removal of enclosing leaves negatively affected fruit survival and/or growth, but we could not identify the exact mechanism. The results suggested that enclosures allow the plant to produce seeds under the cold weather the plant encounters at the end of its life. Vegetative and reproductive traits of plants have usually been studied separately. This study indicates how they can dynamically interact, as shown by an examination of associations among leaf and reproductive trait changes according to life stages.