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首页> 外文期刊>Marine ecology progress series >Blue light regulation of host pigment in reef-building corals
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Blue light regulation of host pigment in reef-building corals

机译：造礁珊瑚中宿主色素的蓝光调节

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Reef-building corals harbor an astounding diversity of colorful GFP (green fluorescent protein)-like proteins. These pigments can easily be detected and thus may serve as intrinsic optical markers of physiological condition, provided that the determinants that control their expression are well understood. Here we have analyzed the effect of light on the regulation of major classes of GFP-like pigments in corals of the taxa Acroporidae, Merulinidae and Pocilloporidae. Pigment levels in the tissues of all studied species were observed to be tightly controlled by light. Two groups could be distinguished by their distinctly different light-dependent regulation. The low-threshold group contains mainly cyan fluorescent proteins; they are expressed in considerable amounts at very low light intensities, and their tissue content increases with light to a maximum at a photon flux of 400 μmol m~(-2) s~(-1). The high-threshold group includes green and red fluorescent proteins as well as non-fluorescent chromoproteins. These pigments are essentially absent in corals grown under very low light, but their tissue content increases in proportion to photon flux densities >400 μmol m~(-2) s~(-1).. The enhancement of coral pigmentation is primarily dependent on the blue component of the spectrum and regulated at the transcriptional level. The specific regulation patterns suggest complex functions of GFP-like proteins related to the photobiology of reef corals. Moreover, the distinct response of coral coloration to light climate promises that the pigment complement can also be predicted in natural habitats. Our results stress the potential of GFP-like proteins as intrinsic markers of physiological processes, as well as overall health, in corals.
机译：造礁珊瑚具​​有惊人的丰富多彩的类GFP（绿色荧光蛋白）样蛋白。这些色素很容易被检测到，因此可以用作生理状况的固有光学标记，前提是可以很好地控制其表达的决定因素。在这里，我们分析了光对类群Acroporidae，Merulinidae和Pocilloporidae珊瑚中主要类别的GFP样色素的调节作用。观察到所有研究物种的组织中的颜料水平均受光严格控制。两组可以通过其明显不同的光依赖性调节来区分。低阈值基团主要包含青色荧光蛋白。它们在非常低的光强度下大量表达，在光子通量为400μmolm〜（-2）s〜（-1）时，它们的组织含量随光的增加而增加。高阈值组包括绿色和红色荧光蛋白以及非荧光色蛋白。这些色素在极弱光下生长的珊瑚中基本上不存在，但它们的组织含量随光子通量密度> 400μmolm〜（-2）s〜（-1）的增加而增加。珊瑚色素沉着的增强主要取决于光谱中的蓝色部分，在转录水平上受到调节。具体的调控模式表明与珊瑚礁的光生物学有关的GFP样蛋白的复杂功能。此外，珊瑚着色对轻度气候的独特反应有望在自然栖息地中预测色素的补充。我们的结果强调了类GFP蛋白作为珊瑚生理过程以及整体健康状况的内在标志物的潜力。

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