Phosphoinositides Regulate Clathrin-Dependent Endocytosis at the Tip of Pollen Tubes in Arabidopsis and Tobacco[W]

摘要

Two interconvertible phosphoinositides, PI(4,5)P2 and PI4P, function in different steps of clathrin-dependent endocytosis in pollen tubes. Whereas accumulation of PI(4,5)P2 is required for the initial steps of membrane invagination, PI4P is required for the later steps of closing and/or fission of invaginated membrane.