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Overexpression of AtGRDP2, a novel glycine-rich domain protein, accelerates plant growth and improves stress tolerance
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
Acceso Abierto
Atribución-NoComercial-SinDerivadas
https://doi.org/10.3389/fpls.2014.00782
Glycine-rich domain protein
Arabidopsis thaliana
Lactuca sativa
Development
Indole-3-acetic acid
Salt stress
"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."
Frontiers Research Foundation
2015-01
Artículo
Inglés
Público en general
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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Versión publicada
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Aparece en las colecciones: Publicaciones Científicas Biología Molecular

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