Faculty of Biology, Lorry I Lokey Interdisciplinary Center for Life Sciences and Engineering, Faculty of Computer Science, Technion - Israel Institute of Technology, Haifa 32000, Israel.
Environ Microbiol. 2012 Jan;14(1):140-6. doi: 10.1111/j.1462-2920.2011.02554.x. Epub 2011 Sep 1.
The above-ground surfaces of terrestrial plants, the phyllosphere, comprise the main interface between the terrestrial biosphere and solar radiation. It is estimated to host up to 10(26) microbial cells that may intercept part of the photon flux impinging on the leaves. Based on 454-pyrosequencing-generated metagenome data, we report on the existence of diverse microbial rhodopsins in five distinct phyllospheres from tamarisk (Tamarix nilotica), soybean (Glycine max), Arabidopsis (Arabidopsis thaliana), clover (Trifolium repens) and rice (Oryza sativa). Our findings, for the first time describing microbial rhodopsins from non-aquatic habitats, point towards the potential coexistence of microbial rhodopsin-based phototrophy and plant chlorophyll-based photosynthesis, with the different pigments absorbing non-overlapping fractions of the light spectrum.
陆地植物的地上部分，即叶片表面，构成了陆地生物圈与太阳辐射的主要界面。据估计，它容纳了多达 10(26)个微生物细胞，这些细胞可能会拦截部分照射到叶片上的光通量。基于 454 焦磷酸测序生成的宏基因组数据，我们报告了在来自柽柳（Tamarix nilotica）、大豆（Glycine max）、拟南芥（Arabidopsis thaliana）、三叶草（Trifolium repens）和水稻（Oryza sativa）的五个不同叶片表面存在多样的微生物视紫红质。我们的研究结果首次描述了来自非水生生境的微生物视紫红质，表明微生物视紫红质光合作用和植物叶绿素光合作用可能共存，不同的色素吸收光光谱的非重叠部分。
