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Origins and Stepwise Expansion of R2R3-MYB Transcription Factors for the Terrestrial Adaptation of Plants

The R2R3-MYB transcription factors play critical roles in various processes in embryophytes (land plants). Here, we identified genes encoding R2R3-MYB proteins from rhodophytes, glaucophytes, Chromista, chlorophytes, charophytes, and embryophytes. We classified the R2R3-MYB genes into three subgroup...

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Autores principales: Chang, Xiaojun, Xie, Shupeng, Wei, Lanlan, Lu, Zhaolian, Chen, Zhong-Hua, Chen, Fei, Lai, Zhongxiong, Lin, Zhenguo, Zhang, Liangsheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7785938/
https://www.ncbi.nlm.nih.gov/pubmed/33424877
http://dx.doi.org/10.3389/fpls.2020.575360
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author Chang, Xiaojun
Xie, Shupeng
Wei, Lanlan
Lu, Zhaolian
Chen, Zhong-Hua
Chen, Fei
Lai, Zhongxiong
Lin, Zhenguo
Zhang, Liangsheng
author_facet Chang, Xiaojun
Xie, Shupeng
Wei, Lanlan
Lu, Zhaolian
Chen, Zhong-Hua
Chen, Fei
Lai, Zhongxiong
Lin, Zhenguo
Zhang, Liangsheng
author_sort Chang, Xiaojun
collection PubMed
description The R2R3-MYB transcription factors play critical roles in various processes in embryophytes (land plants). Here, we identified genes encoding R2R3-MYB proteins from rhodophytes, glaucophytes, Chromista, chlorophytes, charophytes, and embryophytes. We classified the R2R3-MYB genes into three subgroups (I, II, and III) based on their evolutionary history and gene structure. The subgroup I is the most ancient group that includes members from all plant lineages. The subgroup II was formed before the divergence of charophytes and embryophytes. The subgroup III genes form a monophyletic group and only comprise members from land plants with conserved exon–intron structure. Each subgroup was further divided into multiple clades. The subgroup I can be divided into I-A, I-B, I-C, and I-D. The I-A, I-B, and I-C are the most basal clades that have originated before the divergence of Archaeplastida. The I-D with the II and III subgroups form a monophyletic group, containing only green plants. The II and III subgroups form another monophyletic group with Streptophyta only. Once on land, the subgroup III genes have experienced two rounds of major expansions. The first round occurred before the origin of land plants, and the second round occurred after the divergence of land plants. Due to significant gene expansion, the subgroup III genes have become the predominant group of R2R3-MYBs in land plants. The highly unbalanced pattern of birth and death evolution of R2R3-MYB genes indicates their important roles in the successful adaptation and massive radiation of land plants to occupy a multitude of terrestrial environments.
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spelling pubmed-77859382021-01-07 Origins and Stepwise Expansion of R2R3-MYB Transcription Factors for the Terrestrial Adaptation of Plants Chang, Xiaojun Xie, Shupeng Wei, Lanlan Lu, Zhaolian Chen, Zhong-Hua Chen, Fei Lai, Zhongxiong Lin, Zhenguo Zhang, Liangsheng Front Plant Sci Plant Science The R2R3-MYB transcription factors play critical roles in various processes in embryophytes (land plants). Here, we identified genes encoding R2R3-MYB proteins from rhodophytes, glaucophytes, Chromista, chlorophytes, charophytes, and embryophytes. We classified the R2R3-MYB genes into three subgroups (I, II, and III) based on their evolutionary history and gene structure. The subgroup I is the most ancient group that includes members from all plant lineages. The subgroup II was formed before the divergence of charophytes and embryophytes. The subgroup III genes form a monophyletic group and only comprise members from land plants with conserved exon–intron structure. Each subgroup was further divided into multiple clades. The subgroup I can be divided into I-A, I-B, I-C, and I-D. The I-A, I-B, and I-C are the most basal clades that have originated before the divergence of Archaeplastida. The I-D with the II and III subgroups form a monophyletic group, containing only green plants. The II and III subgroups form another monophyletic group with Streptophyta only. Once on land, the subgroup III genes have experienced two rounds of major expansions. The first round occurred before the origin of land plants, and the second round occurred after the divergence of land plants. Due to significant gene expansion, the subgroup III genes have become the predominant group of R2R3-MYBs in land plants. The highly unbalanced pattern of birth and death evolution of R2R3-MYB genes indicates their important roles in the successful adaptation and massive radiation of land plants to occupy a multitude of terrestrial environments. Frontiers Media S.A. 2020-12-23 /pmc/articles/PMC7785938/ /pubmed/33424877 http://dx.doi.org/10.3389/fpls.2020.575360 Text en Copyright © 2020 Chang, Xie, Wei, Lu, Chen, Chen, Lai, Lin and Zhang. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Chang, Xiaojun
Xie, Shupeng
Wei, Lanlan
Lu, Zhaolian
Chen, Zhong-Hua
Chen, Fei
Lai, Zhongxiong
Lin, Zhenguo
Zhang, Liangsheng
Origins and Stepwise Expansion of R2R3-MYB Transcription Factors for the Terrestrial Adaptation of Plants
title Origins and Stepwise Expansion of R2R3-MYB Transcription Factors for the Terrestrial Adaptation of Plants
title_full Origins and Stepwise Expansion of R2R3-MYB Transcription Factors for the Terrestrial Adaptation of Plants
title_fullStr Origins and Stepwise Expansion of R2R3-MYB Transcription Factors for the Terrestrial Adaptation of Plants
title_full_unstemmed Origins and Stepwise Expansion of R2R3-MYB Transcription Factors for the Terrestrial Adaptation of Plants
title_short Origins and Stepwise Expansion of R2R3-MYB Transcription Factors for the Terrestrial Adaptation of Plants
title_sort origins and stepwise expansion of r2r3-myb transcription factors for the terrestrial adaptation of plants
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7785938/
https://www.ncbi.nlm.nih.gov/pubmed/33424877
http://dx.doi.org/10.3389/fpls.2020.575360
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