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Title: Genetic dissection of the jasmonate pathway in arabidopsis
Keywords: Jasmonates, COI1, GmCOI1, LeCOI1, D1 mutant, J183
Issue Date: 17-Aug-2006
Citation: WANG ZHILONG (2006-08-17). Genetic dissection of the jasmonate pathway in arabidopsis. ScholarBank@NUS Repository.
Abstract: Jasmonates regulate plant defense and development. The F-box protein gene COI1 from Arabidopsis plays a fundamental role in the jasmonate signaling pathway. In this study two COI1 orthologs, GmCOI1 and LeCOI1, were isolated from soybean and tomato, respectively. Functional analyses demonstrated that GmCOI1 is able to mediate jasmonate-regulated plant defense and fertility in Arabidopsis, and that LeCOI1 is a functional equivalent of Arabidopsis COI1, implying a generic jasmonate pathway with conserved signal components in different plant species. Genetic approaches for screening novel mutants in the jasmonate signaling pathway identified a D1 mutant, defective in DFR (dihydroflavonol reductase), that depends on functional COI1, revealing a crosstalk between the jasmonate signaling pathway and the flavonoid biosynthesis pathway. Also uncovered was a coi1-2 suppressor, J183, defective in lumazine synthase, a key component in the riboflavin pathway, suggesting that this pathway is required for suppression of COI1-mediated root growth, senescence, and plant defense.
Appears in Collections:Ph.D Theses (Open)

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