DOI: 10.1073/pnas.2001913117
论文题名: The macroevolutionary dynamics of symbiotic and phenotypic diversification in lichens
作者: Nelsen M.P. ; Lücking R. ; Boyce C.K. ; Lumbsch H.T. ; Ree R.H.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期: 35 起始页码: 21495
结束页码: 21503
语种: 英语
英文关键词: Diversification
; Macroevolution
; Symbiosis
Scopus关键词: article
; cladistics
; convergent evolution
; ecology
; Lecanoromycetes
; lichen (organism)
; nonhuman
; phenotype
; phylogeny
; symbiont
; Trebouxiophyceae
; Ascomycetes
; DNA sequence
; ecosystem
; evolution
; genetics
; green alga
; lichen (organism)
; metabolism
; procedures
; symbiosis
; Ascomycota
; Biological Evolution
; Chlorophyta
; Ecosystem
; Lichens
; Phylogeny
; Sequence Analysis, DNA
; Symbiosis
英文摘要: Symbioses are evolutionarily pervasive and play fundamental roles in structuring ecosystems, yet our understanding of their macroevolutionary origins, persistence, and consequences is incomplete. We traced the macroevolutionary history of symbiotic and phenotypic diversification in an iconic symbiosis, lichens. By inferring the most comprehensive time-scaled phylogeny of lichen-forming fungi (LFF) to date (over 3,300 species), we identified shifts among symbiont classes that broadly coincided with the convergent evolution of phylogenetically or functionally similar associations in diverse lineages (plants, fungi, bacteria).While a relatively recent loss of lichenization in Lecanoromycetes was previously identified, our work instead suggests lichenization was abandoned far earlier, interrupting what had previously been considered a direct switch between trebouxiophycean and trentepohlialean algal symbionts. Consequently, some of the most diverse clades of LFF are instead derived from nonlichenized ancestors and re-evolved lichenization with Trentepohliales algae, a clade that also facilitated lichenization in unrelated lineages of LFF. Furthermore, while symbiont identity and symbiotic phenotype influence the ecology and physiology of lichens, they are not correlated with rates of lineage birth and death, suggesting more complex dynamics underly lichen diversification. Finally, diversification patterns of LFF differed from those of wood-rotting and ectomycorrhizal taxa, likely reflecting contrasts in their fundamental biological properties. Together, our work provides a timeline for the ecological contributions of lichens, and reshapes our understanding of symbiotic persistence in a classic model of symbiosis. © 2020 National Academy of Sciences. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164069
Appears in Collections: 气候变化与战略
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作者单位: Nelsen, M.P., Department of Science and Education, Negaunee Integrative Research Center, Field Museum, Chicago, IL 60605, United States; Lücking, R., Botanischer Garten und Botanisches Museum, Freie Universität Berlin, Berlin, 14195, Germany; Boyce, C.K., Department of Geological Sciences, Stanford University, Stanford, CA 94305, United States; Lumbsch, H.T., Department of Science and Education, Negaunee Integrative Research Center, Field Museum, Chicago, IL 60605, United States; Ree, R.H., Department of Science and Education, Negaunee Integrative Research Center, Field Museum, Chicago, IL 60605, United States
Recommended Citation:
Nelsen M.P.,Lücking R.,Boyce C.K.,et al. The macroevolutionary dynamics of symbiotic and phenotypic diversification in lichens[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(35)