Evolution by gene duplication of Medicago truncatula PISTILLATA-like transcription factors

Journal of Experimental Botany
Edelín RoqueLuis A Cañas

Abstract

PISTILLATA (PI) is a member of the B-function MADS-box gene family, which controls the identity of both petals and stamens in Arabidopsis thaliana. In Medicago truncatula (Mt), there are two PI-like paralogs, known as MtPI and MtNGL9. These genes differ in their expression patterns, but it is not known whether their functions have also diverged. Describing the evolution of certain duplicated genes, such as transcription factors, remains a challenge owing to the complex expression patterns and functional divergence between the gene copies. Here, we report a number of functional studies, including analyses of gene expression, protein-protein interactions, and reverse genetic approaches designed to demonstrate the respective contributions of each M. truncatula PI-like paralog to the B-function in this species. Also, we have integrated molecular evolution approaches to determine the mode of evolution of Mt PI-like genes after duplication. Our results demonstrate that MtPI functions as a master regulator of B-function in M. truncatula, maintaining the overall ancestral function, while MtNGL9 does not seem to have a role in this regard, suggesting that the pseudogenization could be the functional evolutionary fate for this gene. Howe...Continue Reading

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Citations

Mar 10, 2016·Journal of Experimental Botany·Valérie Hecht
Jul 28, 2018·Molecular Biology and Evolution·Andrea HoffmeierGünter Theißen
Oct 5, 2017·Regenerative Medicine·Iñigo De Miguel Beriain
Dec 24, 2018·BMC Plant Biology·Suzanne de BruijnKerstin Kaufmann
Nov 12, 2020·The Plant Journal : for Cell and Molecular Biology·Ana L RodasLuis A Cañas
Dec 6, 2020·The Plant Journal : for Cell and Molecular Biology·Wan-Ting MaoChang-Hsien Yang

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