Reinvention of hermaphroditism via activation of a RADIALIS-like gene in hexaploid persimmon
© 2022. The Author(s), under exclusive licence to Springer Nature Limited..
In flowering plants, different lineages have independently transitioned from the ancestral hermaphroditic state into and out of various sexual systems1. Polyploidizations are often associated with this plasticity in sexual systems2,3. Persimmons (the genus Diospyros) have evolved dioecy via lineage-specific palaeoploidizations. More recently, hexaploid D. kaki has established monoecy and also exhibits reversions from male to hermaphrodite flowers in response to natural environmental signals (natural hermaphroditism, NH), or to artificial cytokinin treatment (artificial hermaphroditism, AH). We sought to identify the molecular pathways underlying these polyploid-specific reversions to hermaphroditism. Co-expression network analyses identified regulatory pathways specific to NH or AH transitions. Surprisingly, the two pathways appeared to be antagonistic, with abscisic acid and cytokinin signalling for NH and AH, respectively. Among the genes common to both pathways leading to hermaphroditic flowers, we identified a small-Myb RADIALIS-like gene, named DkRAD, which is specifically activated in hexaploid D. kaki. Consistently, ectopic overexpression of DkRAD in two model plants resulted in hypergrowth of the gynoecium. These results suggest that production of hermaphrodite flowers via polyploidization depends on DkRAD activation, which is not associated with a loss-of-function within the existing sex determination pathway, but rather represents a new path to (or reinvention of) hermaphroditism.
| Errataetall: |
CommentIn: Nat Plants. 2022 Mar;8(3):198-199. - PMID 35301444 |
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| Medienart: |
E-Artikel |
| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:8 |
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| Enthalten in: |
Nature plants - 8(2022), 3 vom: 17. März, Seite 217-224 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Masuda, Kanae [VerfasserIn] |
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Date Completed 30.03.2022 Date Revised 19.04.2022 published: Print-Electronic CommentIn: Nat Plants. 2022 Mar;8(3):198-199. - PMID 35301444 Citation Status MEDLINE |
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| doi: |
10.1038/s41477-022-01107-z |
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| 500 | |a Citation Status MEDLINE | ||
| 520 | |a © 2022. The Author(s), under exclusive licence to Springer Nature Limited. | ||
| 520 | |a In flowering plants, different lineages have independently transitioned from the ancestral hermaphroditic state into and out of various sexual systems1. Polyploidizations are often associated with this plasticity in sexual systems2,3. Persimmons (the genus Diospyros) have evolved dioecy via lineage-specific palaeoploidizations. More recently, hexaploid D. kaki has established monoecy and also exhibits reversions from male to hermaphrodite flowers in response to natural environmental signals (natural hermaphroditism, NH), or to artificial cytokinin treatment (artificial hermaphroditism, AH). We sought to identify the molecular pathways underlying these polyploid-specific reversions to hermaphroditism. Co-expression network analyses identified regulatory pathways specific to NH or AH transitions. Surprisingly, the two pathways appeared to be antagonistic, with abscisic acid and cytokinin signalling for NH and AH, respectively. Among the genes common to both pathways leading to hermaphroditic flowers, we identified a small-Myb RADIALIS-like gene, named DkRAD, which is specifically activated in hexaploid D. kaki. Consistently, ectopic overexpression of DkRAD in two model plants resulted in hypergrowth of the gynoecium. These results suggest that production of hermaphrodite flowers via polyploidization depends on DkRAD activation, which is not associated with a loss-of-function within the existing sex determination pathway, but rather represents a new path to (or reinvention of) hermaphroditism | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Ikeda, Yoko |e verfasserin |4 aut | |
| 700 | 1 | |a Matsuura, Takakazu |e verfasserin |4 aut | |
| 700 | 1 | |a Kawakatsu, Taiji |e verfasserin |4 aut | |
| 700 | 1 | |a Tao, Ryutaro |e verfasserin |4 aut | |
| 700 | 1 | |a Kubo, Yasutaka |e verfasserin |4 aut | |
| 700 | 1 | |a Ushijima, Koichiro |e verfasserin |4 aut | |
| 700 | 1 | |a Henry, Isabelle M |e verfasserin |4 aut | |
| 700 | 1 | |a Akagi, Takashi |e verfasserin |4 aut | |
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