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Interactions between Phytohormones and Second Metabolite Glucosinolates
Hai-Feng Zhang, Jing Yuan, Qiao-Mei Wang*
Department of Horticulture, the State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development & Biotechnology, Zhejiang University, Hangzhou 310029, China
Abstract: Phytohormones play essential role in plant development， and glucosinolate is a group of important secondary metabolite， the complex interactions exist between phytohormones and glucosinolates at the level of biosynthesis. Aunxin and indole glucosinolates interact at the level of biosynthesis and metabolism. Plant defense signaling molecules can induce the biosynthesis of specific glucosinolates. Jasmonic acid highly induces the expression of indole glucosinolates biosynthetic genes CYP79B2 and CYP79B3， and thus leads to an increase in total indole glucosinolate contents. Specifically， the biosynthesis of indole-3-ylmethyl glucosinolate and N-methoxyindole-3-ylmethyl glucosinolate were highly induced after JA treatment， whereas 4-methoxyindole-3-ylmethyl glucosinolate was slightly induced by salicylic acid and ethylene. The cross talks exist between different plant defense signal transduction pathways to regulate the biosynthesis of indole glucosinolates.
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