Título

Overexpression of AtGRDP2, a novel glycine-rich domain protein, accelerates plant growth and improves stress tolerance

Autor

MARIA AZUCENA ORTEGA AMARO

AIDA ARACELI RODRIGUEZ HERNANDEZ

MARGARITA RODRIGUEZ Y DOMINGUEZ KESSLER

ELOISA HERNANDEZ LUCERO

SERGIO ROSALES MENDOZA

ALEJANDRO IBAÑEZ SALAZAR

PABLO DELGADO SANCHEZ

JUAN FRANCISCO JIMENEZ BREMONT

Nivel de Acceso

Acceso Abierto

Identificador alterno

doi: https://doi.org/10.3389/fpls.2014.00782

Resumen o descripción

"Proteins with glycine-rich signatures have been reported in a wide variety of organisms including plants, mammalians, fungi, and bacteria. Plant glycine-rich protein genes exhibit developmental and tissue-specific expression patterns. Herein, we present the characterization of the AtGRDP2 gene using Arabidopsis null and knockdown mutants and, Arabidopsis and lettuce over-expression lines. AtGRDP2 encodes a short glycine-rich domain protein, containing a DUF1399 domain and a putative RNA recognition motif (RRM). AtGRDP2 transcript is mainly expressed in Arabidopsis floral organs, and its deregulation in Arabidopsis Atgrdp2 mutants and 35S::AtGRDP2 over-expression lines produces alterations in development. The 35S::AtGRDP2 over-expression lines grow faster than the WT, while the Atgrdp2 mutants have a delay in growth and development. The over-expression lines accumulate higher levels of indole-3-acetic acid and, have alterations in the expression pattern of ARF6, ARF8, and miR167 regulators of floral development and auxin signaling. Under salt stress conditions, 35S::AtGRDP2 over-expression lines displayed higher tolerance and increased expression of stress marker genes. Likewise, transgenic lettuce plants over-expressing the AtGRDP2 gene manifest increased growth rate and early flowering time. Our data reveal an important role for AtGRDP2 in Arabidopsis development and stress response, and suggest a connection between AtGRDP2 and auxin signaling."

Editor

Frontiers Research Foundation

Fecha de publicación

enero de 2015

Tipo de publicación

Artículo

Versión de la publicación

Versión publicada

Formato

application/pdf

Idioma

Inglés

Audiencia

Público en general

Sugerencia de citación

Ortega-Amaro MA, Rodríguez-Hernández AA, Rodríguez-Kessler M, Hernández-Lucero E, Rosales-Mendoza S, Ibáñez-Salazar A, Delgado-Sánchez P and Jiménez-Bremont JF (2015) Overexpression of AtGRDP2, a novel glycine-rich domain protein, accelerates plant growth and improves stress tolerance. Front.Plant Sci. 5:782. doi: 10.3389/fpls.2014.00782

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