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Early evolution of the land plant circadian clock

Linde, Anna Malin; Eklund, D. Magnus; Kubota, Akane; Pederson, Eric R. A.; Holm, Karl; Gyllenstrand, Niclas; Nishihama, Ryuichi; Cronberg, Nils LU ; Muranaka, Tomoaki and Oyama, Tokitaka, et al. (2017) In New Phytologist 216(2). p.576-590
Abstract

While angiosperm clocks can be described as an intricate network of interlocked transcriptional feedback loops, clocks of green algae have been modelled as a loop of only two genes. To investigate the transition from a simple clock in algae to a complex one in angiosperms, we performed an inventory of circadian clock genes in bryophytes and charophytes. Additionally, we performed functional characterization of putative core clock genes in the liverwort Marchantia polymorpha and the hornwort Anthoceros agrestis. Phylogenetic construction was combined with studies of spatiotemporal expression patterns and analysis of M. polymorpha clock gene mutants. Homologues to core clock genes identified in Arabidopsis were found not only in... (More)

While angiosperm clocks can be described as an intricate network of interlocked transcriptional feedback loops, clocks of green algae have been modelled as a loop of only two genes. To investigate the transition from a simple clock in algae to a complex one in angiosperms, we performed an inventory of circadian clock genes in bryophytes and charophytes. Additionally, we performed functional characterization of putative core clock genes in the liverwort Marchantia polymorpha and the hornwort Anthoceros agrestis. Phylogenetic construction was combined with studies of spatiotemporal expression patterns and analysis of M. polymorpha clock gene mutants. Homologues to core clock genes identified in Arabidopsis were found not only in bryophytes but also in charophytes, albeit in fewer copies. Circadian rhythms were detected for most identified genes in M. polymorpha and A. agrestis, and mutant analysis supports a role for putative clock genes in M. polymorpha. Our data are in line with a recent hypothesis that adaptation to terrestrial life occurred earlier than previously expected in the evolutionary history of charophyte algae. Both gene duplication and acquisition of new genes was important in the evolution of the plant circadian clock, but gene loss has also contributed to shaping the clock of bryophytes.

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publication status
published
subject
keywords
Marchantia polymorpha, Bryophyte, Circadian clock, Evolution, Transcription factor
in
New Phytologist
volume
216
issue
2
pages
576 - 590
publisher
Wiley-Blackwell
external identifiers
  • scopus:85014157510
  • wos:000410964800024
ISSN
0028-646X
DOI
10.1111/nph.14487
language
English
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yes
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ec7a9d13-bd02-48bf-a6f3-103c33d53ce5
date added to LUP
2017-03-15 14:19:51
date last changed
2018-03-18 05:10:46
@article{ec7a9d13-bd02-48bf-a6f3-103c33d53ce5,
  abstract     = {<p>While angiosperm clocks can be described as an intricate network of interlocked transcriptional feedback loops, clocks of green algae have been modelled as a loop of only two genes. To investigate the transition from a simple clock in algae to a complex one in angiosperms, we performed an inventory of circadian clock genes in bryophytes and charophytes. Additionally, we performed functional characterization of putative core clock genes in the liverwort Marchantia polymorpha and the hornwort Anthoceros agrestis. Phylogenetic construction was combined with studies of spatiotemporal expression patterns and analysis of M. polymorpha clock gene mutants. Homologues to core clock genes identified in Arabidopsis were found not only in bryophytes but also in charophytes, albeit in fewer copies. Circadian rhythms were detected for most identified genes in M. polymorpha and A. agrestis, and mutant analysis supports a role for putative clock genes in M. polymorpha. Our data are in line with a recent hypothesis that adaptation to terrestrial life occurred earlier than previously expected in the evolutionary history of charophyte algae. Both gene duplication and acquisition of new genes was important in the evolution of the plant circadian clock, but gene loss has also contributed to shaping the clock of bryophytes.</p>},
  author       = {Linde, Anna Malin and Eklund, D. Magnus and Kubota, Akane and Pederson, Eric R. A. and Holm, Karl and Gyllenstrand, Niclas and Nishihama, Ryuichi and Cronberg, Nils and Muranaka, Tomoaki and Oyama, Tokitaka and Kohchi, Takayuki and Lagercrantz, Ulf},
  issn         = {0028-646X},
  keyword      = {Marchantia polymorpha,Bryophyte,Circadian clock,Evolution,Transcription factor},
  language     = {eng},
  number       = {2},
  pages        = {576--590},
  publisher    = {Wiley-Blackwell},
  series       = {New Phytologist},
  title        = {Early evolution of the land plant circadian clock},
  url          = {http://dx.doi.org/10.1111/nph.14487},
  volume       = {216},
  year         = {2017},
}