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Type: Journal article
Title: Loss of LOFSEP transcription factor function converts spikelet to leaf-like structures in rice
Author: Wu, D.
Liang, W.
Zhu, W.
Chen, M.
Ferrándiz, C.
Burton, R.
Dreni, L.
Zhang, D.
Citation: Plant Physiology, 2018; 176(2):1646-1664
Publisher: American Society of Plant Biologists
Issue Date: 2018
ISSN: 0032-0889
Statement of
Di Wu, Wanqi Liang, Wanwan Zhu, Mingjiao Chen, Cristina Ferrándiz, Rachel A. Burton, Ludovico Dreni, Dabing Zhang
Abstract: SEPALLATA (SEP)-like genes, which encode a subfamily of MADS-box transcription factors, are essential for specifying floral organ and meristem identity in angiosperms. Rice (Oryza sativa L.) has five SEP-like genes with partial redundancy and overlapping expression domains, yet their functions and evolutionary conservation are only partially known. Here, we describe the biological role of one of the SEP genes of rice, OsMADS5, in redundantly controlling spikelet morphogenesis. OsMADS5 belongs to the conserved LOFSEP subgroup along with OsMADS1 and OsMADS34. OsMADS5 was expressed strongly across a broad range of reproductive stages and tissues. No obvious phenotype was observed in the osmads5 single mutants when compared with the wild type, which was largely due to the functional redundancy among the three LOFSEP genes. Genetic and molecular analyses demonstrated that OsMADS1, OsMADS5 and OsMADS34 together regulate floral meristem determinacy, and specify the identities of spikelet organs by positively regulating the other MADS-box floral homeotic genes. Experiments conducted in yeast also suggested that OsMADS1, OsMADS5 and OsMADS34 form protein-protein interactions with other MADS-box floral homeotic members, which seems to be a typical, conserved feature of plant SEP proteins.
Keywords: Flowers
MADS Domain Proteins
Plant Proteins
Transcription Factors
Gene Expression Regulation, Developmental
Gene Expression Regulation, Plant
Genes, Homeobox
Rights: © 2018 American Society of Plant Biologists. All Rights Reserved.
DOI: 10.1104/pp.17.00704
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Appears in Collections:Agriculture, Food and Wine publications
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