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  • Title: Ecology: a niche for cyanobacteria containing chlorophyll d.
    Author: Kühl M, Chen M, Ralph PJ, Schreiber U, Larkum AW.
    Journal: Nature; 2005 Feb 24; 433(7028):820. PubMed ID: 15729331.
    Abstract:
    The cyanobacterium known as Acaryochloris marina is a unique phototroph that uses chlorophyll d as its principal light-harvesting pigment instead of chlorophyll a, the form commonly found in plants, algae and other cyanobacteria; this means that it depends on far-red light for photosynthesis. Here we demonstrate photosynthetic activity in Acaryochloris-like phototrophs that live underneath minute coral-reef invertebrates (didemnid ascidians) in a shaded niche enriched in near-infrared light. This discovery clarifies how these cyanobacteria are able to thrive as free-living organisms in their natural habitat.
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