Divergence in cryptic leaf colour provides local camouflage in an alpine plant
Divergence in cryptic leaf colour provides local camouflage in an alpine plant
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神秘叶子颜色的差异为高山植物提供了局部伪装
DOI：
10.1098/rspb.2017.1654
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Sun Hang
中科院分区：
文献类型：
--
作者：
Niu Yang;Chen Zhe;Stevens Martin;Sun Hang
通过背景匹配的伪装效果是高度依赖于环境的，通常会导致动物的种内颜色差异，以优化在不同视觉环境中的隐藏。这种现象在植物中很大程度上是未被探索的，尽管一些证据表明它们确实使用隐藏来避免食草动物的伤害。UsingCoreumhemidicentra，一种高山植物与神秘的叶色，我们量化的背景匹配的基础上，他们的蝴蝶敌人的颜色感知的近似模型的叶子和周围的岩石在五个种群。我们还调查了叶色变化的色素基础和取食风险与伪装功效之间的关联。我们发现，植物种群之间表现出显着的颜色差异，与岩石外观的差异一致。叶色的变化是由于两种基本色素叶绿素和花青素的不同数量组合以及不同的空气空间。正如所料，在蝴蝶眼中，叶子的颜色与本国背景的匹配程度要比与外国背景的匹配程度高。此外，改进的隐藏往往与更高水平的喂养风险相关。这些结果表明，不同的神秘叶色可能已经进化到优化本地伪装在各种视觉环境中，扩大我们的理解颜色的进化和种内表型多样性的植物。
The efficacy of camouflage through background matching is highly environment-dependent, often resulting in intraspecific colour divergence in animals to optimize crypsis in different visual environments. This phenomenon is largely unexplored in plants, although several lines of evidence suggest they do use crypsis to avoid damage by herbivores. UsingCorydalis hemidicentra,an alpine plant with cryptic leaf colour, we quantified background matching between leaves and surrounding rocks in five populations based on an approximate model of their butterfly enemy's colour perception. We also investigated the pigment basis of leaf colour variation and the association between feeding risk and camouflage efficacy. We show that plants exhibit remarkable colour divergence between populations, consistent with differences in rock appearances. Leaf colour varies because of a different quantitative combination of two basic pigments—chlorophyll and anthocyanin—plus different air spaces. As expected, leaf colours are better matched against their native backgrounds than against foreign ones in the eyes of the butterfly. Furthermore, improved crypsis tends to be associated with a higher level of feeding risk. These results suggest that divergent cryptic leaf colour may have evolved to optimize local camouflage in various visual environments, extending our understanding of colour evolution and intraspecific phenotype diversity in plants.