216 results found
    1. Plant Biology

    Photosynthesis without β-carotene

    Pengqi Xu et al.
    Tobacco plants containing xanthophyll astaxanthin show that both photosystems are fully functional in the absence of carotenes, and these pigments are not essential for photosynthesis.
    1. Evolutionary Biology
    2. Plant Biology

    The role of photorespiration during the evolution of C4 photosynthesis in the genus Flaveria

    Julia Mallmann et al.
    Metabolic exaptation of an anaplerotic nitrogen cycle between bundle sheath and mesophyll cells may explain the remarkably frequent convergent evolution of C4 photosynthesis.
    1. Computational and Systems Biology
    2. Plant Biology

    Evolution of C4 photosynthesis predicted by constraint-based modelling

    Mary-Ann Blätke, Andrea Bräutigam
    Constraint-based modelling predicts C4 photosynthesis evolves under resource limitation from an ancestral ground state of C3 photosynthesis and attributes divergent metabolic routes in extant C4 subtypes to light.
    1. Cell Biology
    2. Plant Biology

    Photosynthetic sea slugs induce protective changes to the light reactions of the chloroplasts they steal from algae

    Vesa Havurinne, Esa Tyystjärvi
    Slug chloroplasts avoid damage to photosynthesis by maintaining an oxidized electron transfer chain with the help of oxygen-sensitive electron acceptors.
    1. Plant Biology

    Phenotypic landscape inference reveals multiple evolutionary paths to C4 photosynthesis

    Ben P Williams et al.
    Computational modelling indicates that C4 photosynthesis in distantly related plant species arose through a number of independent evolutionary paths.
    1. Microbiology and Infectious Disease

    The human gut and groundwater harbor non-photosynthetic bacteria belonging to a new candidate phylum sibling to Cyanobacteria

    Sara C Di Rienzi et al.
    Melainabacteria, a candidate phylum related to Cyanobacteria, has been identified in gut and sediment samples by genomic analysis.
    1. Biochemistry and Chemical Biology
    2. Plant Biology

    Limitations to photosynthesis by proton motive force-induced photosystem II photodamage

    Geoffry A Davis et al.
    Storage of solar energy in the thylakoid electrical field by photosynthesis in vivo can substantially destabilize charge-separated states in photosystem II, leading to singlet oxygen production and photodamage, contributing to loss of productivity, especially under fluctuating light experienced in the field.
    1. Evolutionary Biology
    2. Plant Biology

    Evolution of alternative biosynthetic pathways for vitamin C following plastid acquisition in photosynthetic eukaryotes

    Glen Wheeler et al.
    Genomic evidence suggests that L-gulonolactone oxidase-the terminal enzyme in vitamin C synthesis, which has been repeatedly lost throughout animal evolution-was lost in plants and other photosynthetic eukaryotes following plastid acquisition.
    1. Genetics and Genomics
    2. Microbiology and Infectious Disease

    Chromerid genomes reveal the evolutionary path from photosynthetic algae to obligate intracellular parasites

    Yong H Woo et al.
    Analysis of chromerid algal genomes reveals how apicomplexans have evolved from free-living algae into successful eukaryotic parasites via massive losses and re-inventing functional roles of genes.
    1. Ecology

    Substantial near-infrared radiation-driven photosynthesis of chlorophyll f-containing cyanobacteria in a natural habitat

    Michael Kühl et al.
    Cyanobacteria with chlorophyll f show substantial near-infrared radiation-driven photosynthesis and can play an important role for primary production in endolithic, intertidal habitats.

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