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

Journal of Integrative Plant Biology
Wei ChenHong-Ju Li

Abstract

The polar growth of pollen tubes is essential for the delivery of sperm cells during fertilization in angiosperms. 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.

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Citations

Nov 19, 2020·Proceedings. Biological Sciences·Kirsten Bomblies
Apr 4, 2021·International Journal of Molecular Sciences·Xiuhong LiJuane Dong
Apr 2, 2021·Plant Physiology·Maki Hayashi, Michael Palmgren
Sep 2, 2021·Journal of Experimental Botany·Heidi Pertl-ObermeyerGerhard Obermeyer

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