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

被引:532
作者
Li, L
Zhao, YF
McCaig, BC
Wingerd, BA
Wang, JH
Whalon, ME
Pichersky, E
Howe, GA [1 ]
机构
[1] Michigan State Univ, Dept Energy, Plant Res Lab, E Lansing, MI 48824 USA
[2] Michigan State Univ, Dept Entomol, E Lansing, MI 48824 USA
[3] Univ Michigan, Dept Biol, Ann Arbor, MI 48109 USA
[4] Michigan State Univ, Dept Biochem & Mol Biol, E Lansing, MI 48824 USA
关键词
D O I
10.1105/tpc.017954
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
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. jail 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.
引用
收藏
页码:126 / 143
页数:18
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