4.6 Article

Jasmonate-induced biosynthesis of steroidal glycoalkaloids depends on COI1 proteins in tomato

期刊

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2017.05.132

关键词

alpha-tomatine; COI1; Jasmonate; Steroidal glycoalkaloid; Tomato

资金

  1. Japan Society for the Promotion of Science [26440144, 17K07447]
  2. Sumitomo Foundation
  3. Mission Sector of the Egyptian Ministry for Higher Education and Scientific Research
  4. Grants-in-Aid for Scientific Research [26440144, 17K07447] Funding Source: KAKEN

向作者/读者索取更多资源

In tomato, perception of jasmonates by a receptor complex, which includes the F-box protein CORONATINE INSENSITIVE 1 (COI1), elicits biosynthesis of defensive steroidal glycoalkaloids (SGAs) via a jasmonate-responsive ERF transcription factor, JRE4/GAME9. Although JRE4 is upregulated by jasmonate and induces the expression of many metabolic genes involved in SGA biosynthesis, it is not known whether JRE4 alone is sufficient for increased SGA biosynthesis upon activation of jasmonate signaling. Here, we show that application of methyl jasmonate induces the expression of JRE4 and SGA biosynthesis genes in leaves and hairy roots of wild-type tomato, but not in jasmonic acid insensitive I (jail), a loss-of-function mutant allele of the tomato COI1 gene. Induced overexpression of JRE4 increased the expression of SGA biosynthesis genes in transgenic hairy roots of both wild-type tomato and the jail mutant, suggesting that JRE4 is the primary transcription factor that functions downstream of the jasmonate signaling pathway. (C) 2017 Elsevier Inc. All rights reserved.

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