ANTH domain-containing proteins are required for the pollen tube plasma membrane integrity via recycling ANXUR kinases.

ABSTRACT: During plant reproduction, sperm cells are delivered to ovules through growing pollen tubes. This process involves tip-localized receptor kinases regulating integrity and/or guidance of pollen tubes, whose localizations must be strictly regulated. However, the molecular basis for tip-localization of these molecules remains largely elusive. Here we show that a pair of AP180 N-terminal homology domain-containing proteins, PICALM5a and PICALM5b, is responsible for the tip-localization of ANXUR receptor kinases acting in an autocrine signaling pathway required for pollen tube integrity in Arabidopsis thaliana. The picalm5a picalm5b double mutant exhibits reduced fertility, and the double mutant pollen is defective in pollen tube integrity with premature bursts. The tip localizati

SUBMITTER: Muro K 

PROVIDER: S-EPMC6158268 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature