期刊
SCIENCE
卷 350, 期 6259, 页码 438-441出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aac6014
关键词
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资金
- NSF [MCB1253103]
- NIH [2R01GM084211]
- Monsanto Excellence Fund Fellowship
- Div Of Molecular and Cellular Bioscience
- Direct For Biological Sciences [1253103] Funding Source: National Science Foundation
Pollen grains undergo dramatic changes in cellular water potential as they deliver the male germ line to female gametes, and it has been proposed that mechanosensitive ion channels may sense the resulting mechanical stress. Here, we identify and characterize MscS-like 8 (MSL8), a pollen-specific, membrane tension-gated ion channel required for pollen to survive the hypoosmotic shock of rehydration and for full male fertility. MSL8 negatively regulates pollen germination but is required for cellular integrity during germination and tube growth. MSL8 thus senses and responds to changes in membrane tension associated with pollen hydration and germination. These data further suggest that homologs of bacterial MscS have been repurposed in eukaryotes to function as mechanosensors in multiple developmental and environmental contexts.
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