期刊
PLANT CELL
卷 28, 期 10, 页码 2478-2492出版社
AMER SOC PLANT BIOLOGISTS
DOI: 10.1105/tpc.16.00454
关键词
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资金
- International European Fellowship-METMADS project
- Centro Nazionale di Ricerca Italiano [Fondo IBF-AR-01-2014Mi]
- EXPOSEED-RISE project
- Universita degli Studi di Milano
- Cariplo Foundation [20112257]
- Institut Universitaire de France
- Coordination for the Improvement of Higher Education Personnel (CAPES)
- EVO-CODE project
- Universite de Rouen and le Reseau de Recherche VASI de Haute Normandie (France)
Although many transcription factors involved in cell wall morphogenesis have been identified and studied, it is still unknown how genetic and molecular regulation of cell wall biosynthesis is integrated into developmental programs. We demonstrate by molecular genetic studies that SEEDSTICK (STK), a transcription factor controlling ovule and seed integument identity, directly regulates PMEI6 and other genes involved in the biogenesis of the cellulose-pectin matrix of the cell wall. Based on atomic force microscopy, immunocytochemistry, and chemical analyses, we propose that structural modifications of the cell wall matrix in the stk mutant contribute to defects in mucilage release and seed germination under water-stress conditions. Our studies reveal a molecular network controlled by STK that regulates cell wall properties of the seed coat, demonstrating that developmental regulators controlling organ identity also coordinate specific aspects of cell wall characteristics.
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