Plasma membrane H+-ATPases-mediated cytosolic proton gradient regulates pollen tube growthFA

• 作者: Hong-Ju Li Peng-Fei Jia Wei Chen Wei-Cai Yang
• 来源期刊: 植物学报（英文版）
• 年，卷（期）: 2020,（12）
• 所属期刊栏目: Breakthrough Report
• 页码范围: 1817-1822
• 页数: 6页
• 语种: 英文
• DOI: 10.1111/jipb.12981

摘要

The polar growth of pollen tubes is essential for the delivery of sperm cells during fertilization in angio-sperms. How this polar growth is regulated has been a long-standing question. An in vitro pharmacological assay previously implicated proton flux in pollen tube growth, although genetic and cellular supporting evidence was lacking. Here, we report that protons form a gradient from the pollen tube tip to the shank region and this gradient is generated by three members of Arabidopsis H+-ATPases (AHAs). Genetic analysis suggested that these AHAs are essential for pollen tube growth, thus providing new insight into the regulation of polar growth.