RRC ID 71601
Author Truskina J, Brück S, Stintzi A, Boeuf S, Doll NM, Fujita S, Geldner N, Schaller A, Ingram GC.
Title A peptide-mediated, multilateral molecular dialogue for the coordination of pollen wall formation.
Journal Proc Natl Acad Sci U S A
Abstract SignificancePollen viability depends on a tough external barrier called the pollen wall. Pollen wall components are produced by tapetum cells, which surround developing pollen grains within the anther. Precise coordination of tapetum activity with pollen grain development is required to ensure effective pollen wall formation. Here, we reveal that this is achieved through a multidirectional dialogue involving three distinct cell types. We show that peptide precursors from the tapetum are activated by proteases produced stage specifically in developing pollen grains. Unexpectedly, we found that activated peptides are perceived not in the tapetum, but in the middle layer, which encloses the developing tapetum and pollen grains, revealing an unsuspected role for this enigmatic cell layer in the control of tapetum development.
Volume 119(22)
Pages e2201446119
Published 2022-5-31
DOI 10.1073/pnas.2201446119
PMID 35609199
PMC PMC9295805
MeSH Flowers* Gene Expression Regulation, Plant Peptides / metabolism Pollen* / metabolism
IF 9.412
Arabidopsis / Cultured plant cells, genes pda11071