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Lateral organ diversification in plants mediated by the ALOG protein family of transcription factors

View ORCID ProfileSatoshi Naramoto, Victor Arnold Shivas Jones, View ORCID ProfileNicola Trozzi, Mayuko Sato, Kiminori Toyooka, Masaki Shimamura, Sakiko Ishida, Kazuhiko Nishitani, Kimitsune Ishizaki, Ryuichi Nishihama, View ORCID ProfileTakayuki Kohchi, Liam Dolan, Junko Kyozuka
doi: https://doi.org/10.1101/689109
Satoshi Naramoto
aGraduate School of Life Sciences, Tohoku University, Sendai, 980-8577, Japan
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  • ORCID record for Satoshi Naramoto
  • For correspondence: satoshi.naramoto.d6@tohoku.ac.jp
Victor Arnold Shivas Jones
bDepartment of Plant Sciences, University of Oxford, Oxford OX1 3RB, UK
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Nicola Trozzi
aGraduate School of Life Sciences, Tohoku University, Sendai, 980-8577, Japan
cDepartment of Molecular Biology, Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, Umeå 901 87, Sweden
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Mayuko Sato
dRIKEN Center for Sustainable Resource Science, Yokohama 230-0045, Japan
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Kiminori Toyooka
dRIKEN Center for Sustainable Resource Science, Yokohama 230-0045, Japan
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Masaki Shimamura
eGraduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
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Sakiko Ishida
fGraduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
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Kazuhiko Nishitani
aGraduate School of Life Sciences, Tohoku University, Sendai, 980-8577, Japan
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Kimitsune Ishizaki
gGraduate School of Science, Kobe University, Kobe 657-8501, Japan
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Ryuichi Nishihama
fGraduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
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Takayuki Kohchi
fGraduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
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  • ORCID record for Takayuki Kohchi
Liam Dolan
bDepartment of Plant Sciences, University of Oxford, Oxford OX1 3RB, UK
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Junko Kyozuka
aGraduate School of Life Sciences, Tohoku University, Sendai, 980-8577, Japan
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Abstract

Land plant shoot structures evolved a diversity of lateral organs as morphological adaptations to the terrestrial environment, in which lateral organs independently evolved in each lineage in the sporophyte or gametophyte generation. The gametophyte meristem of the basally-diverging plant Marchantia polymorpha produces axes with non-photosynthetic scale-like lateral organs instead of leaves. Here we report that an ALOG (Arabidopsis LSH1 and Oryza G1) family protein in Marchantia, MpTAWAWA1 (MpTAW1), regulates meristem maintenance and lateral organ development. A mutation in MpTAW1, preferentially expressed in lateral organs, induces lateral organs with mis-specified identity and increased cell number, and furthermore, causes defects in apical meristem maintenance. Remarkably, MpTAW1 expression rescued the elongated-spikelet phenotype of a rice mutant of MpTAW1 homologue. This suggests that ALOG genes are co-opted to specify lateral organ identities in both gametophyte and sporophyte shoots by repressing lateral organ growth. We propose that the recruitment of ALOG-mediated lateral organ modification was in part responsible for the convergent evolution of independently-evolved lateral organs among highly divergent plant lineages and contributed to the morphological diversification of land plants.

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Posted July 02, 2019.
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Lateral organ diversification in plants mediated by the ALOG protein family of transcription factors
Satoshi Naramoto, Victor Arnold Shivas Jones, Nicola Trozzi, Mayuko Sato, Kiminori Toyooka, Masaki Shimamura, Sakiko Ishida, Kazuhiko Nishitani, Kimitsune Ishizaki, Ryuichi Nishihama, Takayuki Kohchi, Liam Dolan, Junko Kyozuka
bioRxiv 689109; doi: https://doi.org/10.1101/689109
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Lateral organ diversification in plants mediated by the ALOG protein family of transcription factors
Satoshi Naramoto, Victor Arnold Shivas Jones, Nicola Trozzi, Mayuko Sato, Kiminori Toyooka, Masaki Shimamura, Sakiko Ishida, Kazuhiko Nishitani, Kimitsune Ishizaki, Ryuichi Nishihama, Takayuki Kohchi, Liam Dolan, Junko Kyozuka
bioRxiv 689109; doi: https://doi.org/10.1101/689109

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