The tomato homolog of CORONATINE-INSENSITIVE1 is required for the maternal control of seed maturation, jasmonate-signaled defense responses, and glandular trichome development

Plant Cell. 2004 Jan;16(1):126-43. doi: 10.1105/tpc.017954. Epub 2003 Dec 19.


Jasmonic acid (JA) is a fatty acid-derived signaling molecule that regulates a broad range of plant defense responses against herbivores and some microbial pathogens. Molecular genetic studies in Arabidopsis have established that JA also performs a critical role in anther and pollen development but is not essential for other developmental aspects of the plant's life cycle. Here, we describe the phenotypic and molecular characterization of a sterile mutant of tomato (jasmonic acid-insensitive1 [jai1]) that is defective in JA signaling. Although the mutant exhibited reduced pollen viability, sterility was caused by a defect in the maternal control of seed maturation, which was associated with the loss of accumulation of JA-regulated proteinase inhibitor proteins in reproductive tissues. jai1 plants exhibited several defense-related phenotypes, including the inability to express JA-responsive genes, severely compromised resistance to two-spotted spider mites, and abnormal development of glandular trichomes. We demonstrate that these defects are caused by the loss of function of the tomato homolog of CORONATINE-INSENSITIVE1 (COI1), an F-box protein that is required for JA-signaled processes in Arabidopsis. These findings indicate that the JA/COI1 signaling pathway regulates distinct developmental processes in different plants and suggest a role for JA in the promotion of glandular trichome-based defenses.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Cell Surface Extensions / physiology*
  • Cyclopentanes / pharmacology*
  • Gene Expression Regulation, Developmental / drug effects
  • Gene Expression Regulation, Plant / drug effects
  • Immunity, Innate / drug effects
  • Immunity, Innate / genetics
  • Lycopersicon esculentum / genetics*
  • Lycopersicon esculentum / growth & development
  • Lycopersicon esculentum / parasitology
  • Molecular Sequence Data
  • Oxylipins
  • Plant Diseases / parasitology
  • Plant Proteins / genetics*
  • Plant Proteins / metabolism
  • Reproduction / physiology
  • Seeds / genetics*
  • Seeds / growth & development
  • Seeds / metabolism
  • Sequence Homology, Amino Acid
  • Signal Transduction / drug effects*
  • Signal Transduction / genetics
  • Tetranychidae / growth & development


  • Cyclopentanes
  • Oxylipins
  • Plant Proteins
  • jasmonic acid

Associated data

  • GENBANK/AY423550