NERD1 is required for primexine formation and plasma membrane undulation during microsporogenesis in Arabidopsis thaliana.

ABSTRACT: The primexine formation and plasma membrane undulation are the crucial steps of pollen wall formation in many angiosperms. However, the molecular mechanism underlining these processes is largely unknown. In Arabidopsis, NEW ENHANCER OF ROOT DWARFISM1 (NERD1), a transmembrane protein, was reported to play pleiotropic roles in plant development including male fertility control; while, how NERD1 disruption impacts male reproduction is yet unclear. Here, we revealed that the male sterility of nerd1 mutants is attributed to defects in early steps of pollen wall formation. We found that nerd1-2 is void of primexine formation and microspore plasma membrane undulation, defective in callose deposition. Consequently, sporopollenin precursors are unable to deposit and assemble on

SUBMITTER: Xu D 

PROVIDER: S-EPMC9590514 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature