The molecular framework balancing growth and defense in response to plant elicitor peptide-induced signals in Arabidopsis

Elevated stress signaling compromises plant growth by suppressing proliferative and formative division in the meristem. Plant elicitor peptide, an endogenous danger signal triggered by biotic and abiotic stresses in Arabidopsis (Arabidopsis thaliana), suppresses proliferative division, alters xylem...

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Bibliographic Details
Published in:The Plant cell 2024-12, Vol.37 (1)
Main Authors: Dhar, Souvik, Kim, Soo Youn, Shin, Hee-Ji, Park, Jongsung, Lee, Ji-Young
Format: Article
Language:English
Subjects:
Arabidopsis - genetics
Arabidopsis - growth & development
Arabidopsis - metabolism
Arabidopsis - physiology
Arabidopsis Proteins - genetics
Arabidopsis Proteins - metabolism
Cell Cycle - genetics
Gene Expression Regulation, Plant
Meristem - genetics
Meristem - growth & development
Meristem - metabolism
Peptides - metabolism
Plant Roots - genetics
Plant Roots - growth & development
Plant Roots - metabolism
Signal Transduction
Stress, Physiological
Trans-Activators
Zinc Fingers
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Summary:Elevated stress signaling compromises plant growth by suppressing proliferative and formative division in the meristem. Plant elicitor peptide, an endogenous danger signal triggered by biotic and abiotic stresses in Arabidopsis (Arabidopsis thaliana), suppresses proliferative division, alters xylem vessel organization, and disrupts cell-to-cell symplastic connections in roots. To gain insight into the dynamic molecular framework that modulates root development under elevated danger signals, we performed a time-course RNA-sequencing analysis of the root meristem after synthetic PEP1 treatment. Our analyses revealed that SALT TOLERANCE ZINC FINGER (STZ) and its homologs are a potential nexus between the stress response and proliferative cell cycle regulation. Through functional, phenotypic, and transcriptomic analyses, we observed that STZ differentially controls the cell cycle, cell differentiation, and stress response genes in various tissue layers of the root meristem. Moreover, we determined the STZ expression level critical for enabling the growth-defense tradeoff. These findings provide valuable information about the dynamic gene expression changes that occur upon perceiving danger signals in the root meristem and potential engineering strategies to generate stress-resilient plants.
ISSN:1040-4651
1532-298X
1532-298X
DOI:10.1093/plcell/koae327