Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/112278
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Type: Journal article
Title: Regulatory role of a receptor-like kinase in specifying anther cell identity
Author: Yang, L.
Qian, X.
Chen, M.
Fei, Q.
Meyers, B.
Liang, W.
Zhang, D.
Citation: Plant Physiology, 2016; 171(3):2085-2100
Publisher: American Society of Plant Biologists
Issue Date: 2016
ISSN: 0032-0889
1532-2548
Statement of
Responsibility: 
Li Yang, Xiaoling Qian, Mingjiao Chen, Qili Fei, Blake C. Meyers, Wanqi Liang, and Dabing Zhang
Abstract: In flowering plants, sequential formation of anther cell types is a highly ordered process that is essential for successful meiosis and sexual reproduction. Differentiation of meristematic cells and cell-cell communication are proposed to coordinate anther development. Among the proposed mechanisms of cell fate specification are cell surface-localized Leu-rich repeat receptor-like kinases (LRR-RLKs) and their putative ligands. Here, we present the genetic and biochemical evidence that a rice (Oryza sativa) LRR-RLK, MSP1 (MULTIPLE SPOROCYTE1), interacts with its ligand OsTDL1A (TPD1-like 1A), specifying the cell identity of anther wall layers and microsporocytes. An in vitro assay indicates that the 21-amino acid peptide of OsTDL1A has a physical interaction with the LRR domain of MSP1. The ostdl1a msp1 double mutant showed the defect in lacking middle layers and tapetal cells and having an increased number of microsporocytes similar to the ostdl1a or msp1 single mutant, indicating the same pathway of OsTDL1A-MSP1 in regulating anther development. Genome-wide expression profiles showed the altered expression of genes encoding transcription factors, particularly basic helix-loop-helix and basic leucine zipper domain transcription factors in ostdl1a and msp1 Among these reduced expressed genes, one putatively encodes a TGA (TGACGTCA cis-element-binding protein) factor OsTGA10, and another one encodes a plant-specific CC-type glutaredoxin OsGrx_I1. OsTGA10 was shown to interact with OsGrx_I1, suggesting that OsTDL1A-MSP1 signaling specifies anther cell fate directly or indirectly affecting redox status. Collectively, these data point to a central role of the OsTDL1A-MSP1 signaling pathway in specifying somatic cell identity and suppressing overproliferation of archesporial cells in rice.
Keywords: Plants, Genetically Modified
Flowers
Protein Kinases
Plant Proteins
Transcription Factors
Signal Transduction
Gene Expression Regulation, Plant
Oxidation-Reduction
Ovule
Plant Cells
Oryza
Rights: © 2016 American Society of Plant Biologists. All Rights Reserved.
DOI: 10.1104/pp.16.00016
Appears in Collections:Agriculture, Food and Wine publications
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