Reproductive development in Trithuria submersa (Hydatellaceae: Nymphaeales): the involvement of AGAMOUS-like genes.
Planta
; 260(5): 106, 2024 Sep 26.
Article
em En
| MEDLINE
| ID: mdl-39327272
ABSTRACT
MAIN CONCLUSION:
In the early diverging angiosperm Trithuria submersa TsAG1 and TsAG2 are expressed in different flower organs, including bracts, while TsAG3 is more ovule-specific, probably functioning as a D-type gene. Species of Trithuria, the only genus of the family Hydatellaceae, represent ideal candidates to explore the biology and flower evolution of early diverging angiosperms. The life cycle of T. submersa is generally known, and the "reproductive units" are morphologically well described, but the availability of genetic and developmental data of T. submersa is still scarce. To fill this gap, a transcriptome analysis of the reproductive structures was performed and presented in this work. This analysis provided sequences of MADS-box transcription factors, a gene family known to be involved in flower and fruit development. In situ hybridization experiments on floral buds were performed to describe the spatiotemporal expression patterns of the AGAMOUS genes, revealing the existence of three AG genes with different expression domains in flower organs and in developing ovules. Trithuria may offer important clues to the evolution of reproductive function among early angiosperms and Nymphaeales in particular, and this study aims to broaden relevant knowledge regarding key genes of reproductive development in non-model angiosperms, shaping first flower appearance and evolution.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Regulação da Expressão Gênica de Plantas
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Proteínas de Domínio MADS
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Flores
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article