Rice Ovate Family Protein 2 (OFP2) alters hormonal homeostasis and vasculature development

Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

Détails bibliographiques
Publié dans:Plant science : an international journal of experimental plant biology. - 1985. - 241(2015) vom: 01. Dez., Seite 177-88
Auteur principal: Schmitz, Aaron J (Auteur)
Autres auteurs: Begcy, Kevin, Sarath, Gautam, Walia, Harkamal
Format: Article en ligne
Langue:English
Publié: 2015
Accès à la collection:Plant science : an international journal of experimental plant biology
Sujets:Journal Article BELL Gibberellin KNOX OFP Ovate Family Protein Rice Vasculature Gibberellins Plant Growth Regulators plus... Plant Proteins Repressor Proteins
Description
Résumé:Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.
OFP (Ovate Family Protein) is a transcription factor family found only in plants. In dicots, OFPs control fruit shape and secondary cell wall biosynthesis. OFPs are also thought to function through interactions with KNOX and BELL transcription factors. Here, we have functionally characterized OsOFP2, a member of the OFP subgroup associated with regulating fruit shape. OsOFP2 was found to localize to the nucleus and to the cytosol. A putative nuclear export signal was identified within the OVATE domain and was required for the localization of OsOFP2 to distinct cytosolic spots. Rice plants overexpressing OsOFP2 were reduced in height and exhibited altered leaf morphology, seed shape, and positioning of vascular bundles in stems. Transcriptome analysis indicated disruptions of genes associated with vasculature development, lignin biosynthesis, and hormone homeostasis. Reduced expression of the gibberellin biosynthesis gene GA 20-oxidase 7 coincided with lower gibberellin content in OsOFP2 overexpression lines. Also, we found that OsOFP2 was expressed in plant vasculature and determined that putative vascular development KNOX and BELL proteins interact with OsOFP2. KNOX and BELL genes are known to suppress gibberellin biosynthesis through GA20ox gene regulation and can restrict lignin biosynthesis. We propose that OsOFP2 could modulate KNOX-BELL function to control diverse aspects of development including vasculature development
Description:Date Completed 05.10.2016
Date Revised 30.09.2020
published: Print-Electronic
Citation Status MEDLINE
ISSN:1873-2259
DOI:10.1016/j.plantsci.2015.10.011