RRC ID 50003
著者 Delaux PM, Radhakrishnan GV, Jayaraman D, Cheema J, Malbreil M, Volkening JD, Sekimoto H, Nishiyama T, Melkonian M, Pokorny L, Rothfels CJ, Sederoff HW, Stevenson DW, Surek B, Zhang Y, Sussman MR, Dunand C, Morris RJ, Roux C, Wong GK, Oldroyd GE, Ané JM.
タイトル Algal ancestor of land plants was preadapted for symbiosis.
ジャーナル Proc Natl Acad Sci U S A
Abstract Colonization of land by plants was a major transition on Earth, but the developmental and genetic innovations required for this transition remain unknown. Physiological studies and the fossil record strongly suggest that the ability of the first land plants to form symbiotic associations with beneficial fungi was one of these critical innovations. In angiosperms, genes required for the perception and transduction of diffusible fungal signals for root colonization and for nutrient exchange have been characterized. However, the origin of these genes and their potential correlation with land colonization remain elusive. A comprehensive phylogenetic analysis of 259 transcriptomes and 10 green algal and basal land plant genomes, coupled with the characterization of the evolutionary path leading to the appearance of a key regulator, a calcium- and calmodulin-dependent protein kinase, showed that the symbiotic signaling pathway predated the first land plants. In contrast, downstream genes required for root colonization and their specific expression pattern probably appeared subsequent to the colonization of land. We conclude that the most recent common ancestor of extant land plants and green algae was preadapted for symbiotic associations. Subsequent improvement of this precursor stage in early land plants through rounds of gene duplication led to the acquisition of additional pathways and the ability to form a fully functional arbuscular mycorrhizal symbiosis.
巻・号 112(43)
ページ 13390-5
公開日 2015-10-27
DOI 10.1073/pnas.1515426112
PII 1515426112
PMID 26438870
PMC PMC4629359
MeSH Adaptation, Biological / genetics* Adaptation, Biological / physiology Base Sequence Biological Evolution* Chlorophyta / genetics* Chlorophyta / physiology Closterium / genetics Closterium / growth & development DNA Primers / genetics Embryophyta / genetics* Embryophyta / physiology Fungi / physiology Hepatophyta / genetics Hepatophyta / growth & development Likelihood Functions Medicago truncatula / microbiology Models, Genetic Molecular Sequence Data Mycorrhizae / physiology Phylogeny* Plant Proteins / genetics Plant Roots / microbiology RNA, Plant / genetics Reverse Transcriptase Polymerase Chain Reaction Sequence Analysis, RNA Spirogyra / genetics Spirogyra / growth & development Symbiosis / genetics* Symbiosis / physiology
IF 9.412
引用数 126
リソース情報
藻類 NIES-67