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  MpTCP1 controls cell proliferation and redox processes in Marchantia polymorpha

Busch, A., Deckena, M., Almeida-Trapp, M., Kopischke, S., Kock, C., Schüssler, E., et al. (2019). MpTCP1 controls cell proliferation and redox processes in Marchantia polymorpha. New Phytologist, 224(4), 1627-1641. doi:10.1111/nph.16132.

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http://dx.doi.org/10.1111/nph.16132 (Publisher version)
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 Creators:
Busch, Andrea, Author
Deckena, Marek, Author
Almeida-Trapp, Marilia1, Author              
Kopischke, Sarah, Author
Kock, Cilian, Author
Schüssler, Esther, Author
Tsiantis, Miltos, Author
Mithöfer, Axel1, Author              
Zachgo, Sabine, Author
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1Research Group Plant Defense Physiology, Dr. Axel Mithöfer, MPI for Chemical Ecology, Max Planck Society, ou_3022756              

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 Abstract: TCP transcription factors are key regulators of angiosperm cell proliferation processes. It is unknown whether their regulatory growth capacities are conserved across land plants, which we examined in liverworts, one of the earliest diverging land plant lineages. We generated knockout mutants for MpTCP1, the single TCP‐P clade gene in Marchantia polymorpha, and characterized its function conducting cell proliferation and morphological analyses as well as mRNA expression, transcriptome, chemical and DNA binding studies. Mptcp1ge lines show a reduced vegetative thallus growth and extra tissue formation in female reproductive structures. Additionally, mutant plants reveal increased H2O2 levels and an enhanced pigmentation in the thallus caused by formation of secondary metabolites, such as aminochromes. MpTCP1 proteins interact redox‐dependently with DNA and regulate the expression of a comprehensive redox network, comprising enzymes involved in H2O2 metabolism. MpTCP1 regulates Marchantia growth context‐dependently. Redox sensitivity of the DNA binding capacity of MpTCP1 proteins provides a mechanism to respond to altered redox conditions. Our data suggest that MpTCP1 activity could thereby have contributed to diversification of land plant morphologies and to adaptations to abiotic and biotic challenges, experienced by liverworts during early land plant colonization.

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 Dates: 2019-08-212019-082019-12
 Publication Status: Published in print
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 Identifiers: Other: MIT010
DOI: 10.1111/nph.16132
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Title: New Phytologist
  Other : New Phytol.
Source Genre: Journal
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Publ. Info: London : Academic Press.
Pages: - Volume / Issue: 224 (4) Sequence Number: - Start / End Page: 1627 - 1641 Identifier: ISSN: 0028-646X
CoNE: https://pure.mpg.de/cone/journals/resource/954925334695