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- W3154807862 abstract "A variety of plants in diverse taxa can reproduce asexually via vegetative propagation, in which clonal propagules with new meristem(s) are generated directly from vegetative organs. A basal land plant, Marchantia polymorpha, develops clonal propagules, gemmae, on the gametophyte thallus from the basal epidermis of a specialized receptacle, gemma cup. Here we report an R2R3-MYB transcription factor, designated GEMMA CUP-ASSOCIATED MYB 1 (GCAM1), which is an essential regulator of gemma cup development in M. polymorpha. Targeted disruption of GCAM1 conferred a complete loss of gemma cup formation and gemmae generation. Ectopic overexpression of GCAM1 resulted in formation of cell clumps, suggesting a function of GCAM1 in suppression of cell differentiation. Although gemma cups are a characteristic gametophyte organ for vegetative reproduction in a taxonomically restricted group of liverwort species, phylogenetic and interspecific complementation analyses supported the orthologous relationship of GCAM1 to regulatory factors for axillary meristem formation, e.g. Arabidopsis RAXs and tomato Blind, in angiosperm sporophytes. The present findings in M. polymorpha suggest an ancient acquisition of a regulatory mechanism for production of new meristems, and the use of the mechanism for diverse developmental programs during land plant evolution." @default.
- W3154807862 created "2021-04-26" @default.
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- W3154807862 date "2019-01-01" @default.
- W3154807862 modified "2023-09-26" @default.
- W3154807862 title "GEMMA CUP-ASSOCIATED MYB1, an Orthologue of Axillary Meristem Regulator, is Essential for Vegetative Reproduction in a Liverwort <i>Marchantia polymorpha</i>" @default.
- W3154807862 doi "https://doi.org/10.2139/ssrn.3363749" @default.
- W3154807862 hasPublicationYear "2019" @default.
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