ArticleThe Plant cell2024
COI1 F-box proteins regulate DELLA protein levels, growth, and photosynthetic efficiency in maize.
Article in The Plant cell, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Article
- Decoding the growth-defense dialectic: TOR signaling and developmental genetics in maize.Journal of experimental botany · 2026Review
- Benchmarking Feature Selection Methods and Prediction Models for Flowering Time Prediction in Maize.International journal of molecular sciences · 2026Article
- Article
- CsCOI1 regulates plant growth and defense in citrus.Horticulture research · 2025Article
- A synthetic jasmonate receptor agonist uncouples the growth-defense trade-off in rice.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Gibberellins: extending the Green Revolution.Journal of experimental botany · 2025Review
- Gibberellin-mediated internode elongation in grasses with a focus on bamboo: molecular pathways and regulatory networks.Frontiers in plant science · 2025Review
- Focus on proteolysis.The Plant cell · 2024Article
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11 authors.
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Abstract
The F-box protein Coronatine Insensitive (COI) is a receptor for the jasmonic acid signaling pathway in plants. To investigate the functions of the 6 maize (Zea mays) COI proteins (COI1a, COI1b, COI1c, COI1d, COI2a, and COI2b), we generated single, double, and quadruple loss-of-function mutants. The pollen of the coi2a coi2b double mutant was inviable. The coi1 quadruple mutant (coi1-4x) exhibited shorter internodes, decreased photosynthesis, leaf discoloration, microelement deficiencies, and accumulation of DWARF8 and/or DWARF9, 2 DELLA family proteins that repress the gibberellic acid (GA) signaling pathway. Coexpression of COI and DELLA in Nicotiana benthamiana showed that the COI proteins trigger proteasome-dependent DELLA degradation. Many genes that are downregulated in the coi1-4x mutant are GA-inducible. In addition, most of the proteins encoded by the downregulated genes are predicted to be bundle sheath- or mesophyll-enriched, including those encoding C4-specific photosynthetic enzymes. Heterologous expression of maize Coi genes in N. benthamiana showed that COI2a is nucleus-localized and interacts with maize jasmonate zinc-finger inflorescence meristem domain (JAZ) proteins, the canonical COI repressor partners. However, maize COI1a and COI1c showed only partial nuclear localization and reduced binding efficiency to the tested JAZ proteins. Together, these results show the divergent functions of the 6 COI proteins in regulating maize growth and defense pathways.
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