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Unveiling kiwifruit TCP genes: evolution, functions, and expression insights.
Donglin Li1, Haibo Li1, Huimin Feng1
1College of Biology and Agriculture, Shaoguan University, Shaoguan, Guangdong, China.
Plant Signaling & Behavior
|April 10, 2024
Summary
Kiwifruit TEOSINTE-BRANCHED1/CYCLOIDEA/PROLEFERATING-CELL-FACTORS (TCP) genes were identified and analyzed for evolution and function. Some TCP genes regulate responses to ethylene and bacterial canker disease.
Area of Science:
- Plant molecular biology
- Genomics
- Gene family evolution
Background:
- The TEOSINTE-BRANCHED1/CYCLOIDEA/PROLEFERATING-CELL-FACTORS (TCP) gene family regulates key plant development processes.
- No comprehensive study on kiwifruit TCP genes existed, limiting understanding of their roles in development and stress response.
- Kiwifruit responses to ethylene and Pseudomonas syringae pv. actinidiae (Psa) are critical for agriculture but poorly understood at the genetic level.
Purpose of the Study:
- To identify and characterize the TCP gene family in kiwifruit (Actinidia chinensis and Actinidia eriantha).
- To investigate the evolutionary patterns and functional divergence of kiwifruit TCP genes.
- To explore the role of specific TCP genes in kiwifruit's response to ethylene treatment and Psa infection.
Main Methods:
- Genome-wide identification of TCP genes in Actinidia chinensis and Actinidia eriantha.
- Phylogenetic analysis, conserved domain identification, selection pressure analysis, and synteny analysis.
- Analysis of cis-element architecture and investigation of gene function in response to ethylene and Psa.
Main Results:
- Identified 40 TCP genes in A. chinensis (Ac) and 26 in A. eriantha (Ae).
- Whole-genome duplication was identified as a major driver for TCP gene family expansion in Ac.
- Phylogenetic and structural analyses revealed distinct evolutionary trajectories and functional divergence of duplicated TCP genes.
- Three AcTCP genes significantly influenced ethylene response, and four significantly affected Psa invasion response.
Conclusions:
- This study provides the first comprehensive characterization of the kiwifruit TCP gene family.
- Evolutionary analyses highlight the impact of whole-genome duplication on TCP gene family expansion and diversification.
- Specific AcTCP genes play crucial roles in mediating kiwifruit's response to ethylene and Psa, offering potential targets for crop improvement.
Keywords:
Actinidia chinensisActinidia erianthaKiwifruitTCP gene familyconserved motifexpression profileswhole-genome duplicationMore Related Videos
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