Plasma membrane H+ -ATPases-mediated cytosolic proton gradient regulates pollen tube growth.
J Integr Plant Biol
; 62(12): 1817-1822, 2020 Dec.
Article
em En
| MEDLINE
| ID: mdl-32520397
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.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Membrana Celular
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Arabidopsis
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ATPases Translocadoras de Prótons
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Citosol
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Tubo Polínico
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article