CsCOI1 regulates plant growth and defense in citrus

2025/07/07 by Gang Hu, Bing Liu, Kun Yang +9 · 1 voice
Agricultural and Biological Sciences · #Insect-Plant Interactions and Control #Plant Parasitism and Resistance #Plant-Microbe Interactions and Immunity

paper · pdf · doi:10.1093/hr/uhaf174

openalex publication_date 2025/07/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29

Abstract

Abstract Jasmonates (JAs) play essential roles in plant development and defense. JA perception and responses remain elusive in citrus. Here, we identified core components for JA perception in citrus and elucidated transcriptional changes associated with JA signaling in growth and defense. We showed the F-box protein CORONATINE INSENSITIVE1 (COI1) in citrus is a JA receptor, as Cscoi1 mutants are insensitive to methyl jasmonate and CsCOI1 interacts with CsJAZs in the presence of JA-Ile. CsCOI1-mediated JA signaling represses shoot growth while enhancing resistance to insects. Consistently, CsCOI1 represses the expression of growth promoting genes such as PIF7, while upregulating genes related to defense metabolites in terpene and flavonoid pathways. Additionally, JA signaling antagonizes salicylic acid (SA) signaling at the transcriptional level and promotes susceptibility to citrus canker disease. This study highlights the role of JA signaling in balancing growth and resistance to biotic stress in citrus, revealing critical trade-offs for consideration in precision citrus breeding.

Citations

• Mechanisms to Mitigate the Trade-Off between Growth and Defense
• IQ-TREE 2: New Models and Efficient Methods for Phylogenetic Inference in the Genomic Era
• Growth–defense trade-offs in plants
• Pangenome analysis provides insight into the evolution of the orange subfamily and a key gene for citric acid accumulation in citrus fruits
• Molecular regulation of oil gland development and biosynthesis of essential oils in Citrus spp.
• The AMS/DYT1–MYB module interacts with the MED25–MYC–MYB complexes to inhibit jasmonate‐regulated floral defense in Arabidopsis
• Toxicity of citrus essential oils against Ceratitis capitata (Diptera: Tephritidae) larvae
• Salmon provides fast and bias-aware quantification of transcript expression

Discussions

• Jasmonates in citrus balance growth & defense: COI1 regulates both, but JA signals can boost insect resistance yet increase canker susceptibility. #CitrusScience #PlantDefense @oxfordacademic.bsky.soc [bsky, 0 points, 0 comments]