RRC ID 47413
著者 Kunugi M, Satoh S, Ihara K, Shibata K, Yamagishi Y, Kogame K, Obokata J, Takabayashi A, Tanaka A.
タイトル Evolution of Green Plants Accompanied Changes in Light-Harvesting Systems.
ジャーナル Plant Cell Physiol
Abstract Photosynthetic organisms have various pigments enabling them to adapt to various light environments. Green plants are divided into two groups: streptophytes and chlorophytes. Streptophytes include some freshwater green algae and land plants, while chlorophytes comprise the other freshwater green algae and seawater green algae. The environmental conditions driving the divergence of green plants into these two groups and the changes in photosynthetic properties accompanying their evolution remain unknown. Here, we separated the core antennae of PSI and the peripheral antennae [light-harvesting complexes (LHCs)] in green plants by green-native gel electrophoresis and determined their pigment compositions. Freshwater green algae and land plants have high Chl a/b ratios, with most Chl b existing in LHCs. In contrast, seawater green algae have low Chl a/b ratios. In addition, Chl b exists not only in LHCs but also in PSI core antennae in these organisms, a situation beneficial for survival in deep seawater, where blue-green light is the dominant light source. Finally, low-energy Chl (red Chl) of PSI was detected in freshwater green algae and land plants, but not in seawater green algae. We thus conclude that the different level of Chl b accumulation in core antennae and differences in PSI red Chl between freshwater and seawater green algae are evolutionary adaptations of these algae to their habitats, especially to high- or low-light environments.
巻・号 57(6)
ページ 1231-43
公開日 2016-6-1
DOI 10.1093/pcp/pcw071
PII pcw071
PMID 27057002
MeSH Amino Acid Sequence Biological Evolution* Chlorophyll / metabolism Chlorophyta / metabolism Electrophoresis, Polyacrylamide Gel Energy Metabolism / radiation effects Light Light-Harvesting Protein Complexes / metabolism* Photosystem I Protein Complex / metabolism Phylogeny Plant Proteins / chemistry Plant Proteins / metabolism Protein Domains Seawater Spectrometry, Fluorescence Spectrum Analysis Viridiplantae / metabolism* Viridiplantae / radiation effects
IF 4.062
引用数 16
WOS 分野 PLANT SCIENCES CELL BIOLOGY
リソース情報
藻類 NIES-2541 NIES-254 NIES-1419 NIES-2582