Maternal control of suspensor programmed cell death via gibberellin signaling.
Nat Commun, 2019/08/02;10(1):3484.
Shi C[1], Luo P[1], Du YT[1], Chen H[1], Huang X[1], Cheng TH[1], Luo A[1], Li HJ[2], Yang WC[2], Zhao P[3], Sun MX[4]
Affiliations
PMID: 31375676DOI: 10.1038/s41467-019-11476-3
Impact factor: 17.694
Abstract
Plant embryos are generated and develop in a stable and well-protected microenvironment surrounded by maternal tissue, which is vital for embryogenesis. However, the signaling mechanisms responsible for maternal tissue-to-proembryo communication are not well understood. Here, we report a pathway for maternal tissue-to-proembryo communication. We identify a DELLA protein, NtCRF1 (NtCYS regulative factor 1), which regulates suspensor programmed cell death (PCD). NtCRF1 can bind to the promoter of NtCYS and regulate the suspensor PCD-switch module NtCYS-NtCP14 in response to gibberellin (GA). We confirm that GA4, as a primary signal triggering suspensor PCD, is generated in the micropylar endothelium by the transient activation of NtGA3oxs in the maternal tissue. Thus, we propose that GA is a maternal-to-proembryo communication signal that is decoded in the proembryo by a GID1-CRF1-CYS-CP14 signaling cascade. Using this mode of communication, maternal tissue precisely controls the embryonic suspensor PCD and is able to nurse the proembryo in a stage-dependent manner.
MeSH terms
Apoptosis; Arabidopsis; CRISPR-Cas Systems; Cell Communication; Gene Expression Regulation, Developmental; Gene Expression Regulation, Plant; Gibberellins; Plant Proteins; Plants, Genetically Modified; Promoter Regions, Genetic; Seeds; Signal Transduction; Nicotiana; Transcription Factors
More resources
Full text:
Europe PubMed Central; PubMed Central
EndNote: Download