期刊
SCIENCE
卷 358, 期 6370, 页码 1600-1603出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aao5467
关键词
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资金
- University of Zurich
- Research and Technology Project MecanX - SystemsX.ch [145676]
- Swiss National Science Foundation [310030B_160336, CR32I3_156724]
- Deutsche Forschungsgemeinschaft [BO 4470/1-1]
- Agencia Nacional de Promocion Cientifica y Tecnologica [PICT2014, PICT2015]
- EMBO Short-Term Fellowship
- Company of Biologists
- Swiss National Science Foundation (SNF) [310030B_160336, CR32I3_156724] Funding Source: Swiss National Science Foundation (SNF)
The communication of changes in the extracellular matrix to the interior of the cell is crucial for a cell's function. The extracellular peptides of the RAPID ALKALINIZATION FACTOR (RALF) family have been identified as ligands of receptor-like kinases of the CrRLK1L subclass, but the exact mechanism of their perception is unclear. We found that Arabidopsis RALF4 and RALF19 redundantly regulate pollen tube integrity and growth, and that their function depends on pollen-expressed proteins of the LEUCINE-RICH REPEAT EXTENSIN (LRX) family, which play a role in cell wall development but whose mode of action is not understood. The LRX proteins interact with RALFs, monitoring cell wall changes, which are communicated to the interior of the pollen tube via the CrRLK1L pathway to sustain normal growth.
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