Journal Article
Microbial rhodopsins on leaf surfaces of terrestrial plants
Nof Atamna‐Ismaeel; Omri M. Finkel; Fabian Glaser; Itai Sharon; Ron Schneider; Anton F. Post; John L. Spudich; Christian von Mering; Julia A. Vorholt; David Iluz; Oded Béjà; Shimshon Belkin
Environmental Microbiology · Vol. 14, Issue 1 · pp. 140-146 · 2012
Abstract
Summary 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.