title: Induced production of 1-methoxy-indol-3-ylmethyl glucosinolate by jasmonic acid and methyl jasmonate in sprouts and leaves of pak choi (Brassica rapa ssp. chinensis).
abstract: Pak choi plants (Brassica rapa ssp. chinensis) were treated with different signaling molecules methyl jasmonate, jasmonic acid, linolenic acid, and methyl salicylate and were analyzed for specific changes in their glucosinolate profile. Glucosinolate levels were quantified using HPLC-DAD-UV, with focus on induction of indole glucosinolates and special emphasis on 1-methoxy-indol-3-ylmethyl glucosinolate. Furthermore, the effects of the different signaling molecules on indole glucosinolate accumulation were analyzed on the level of gene expression using semi-quantitative realtime RT-PCR of selected genes. The treatments with signaling molecules were performed on sprouts and mature leaves to determine ontogenetic differences in glucosinolate accumulation and related gene expression. The highest increase of indole glucosinolate levels, with considerable enhancement of the 1-methoxy-indol-3-ylmethyl glucosinolate content, was achieved with treatments of sprouts and mature leaves with methyl jasmonate and jasmonic acid. This increase was accompanied by increased expression of genes putatively involved in the indole glucosinolate biosynthetic pathway. The high levels of indole glucosinolates enabled the plant to preferentially produce the respective breakdown products after tissue damage. Thus, pak choi plants treated with methyl jasmonate or jasmonic acid, are a valuable tool to analyze the specific protection functions of 1-methoxy-indole-3-carbinole in the plants defense strategy in the future.
authors.affiliation: Department of Quality Research, Leibniz-Institute of Vegetable and Ornamental Crops Grossbeeren and Erfurt eV, Grossbeeren, Germany. wiesner@igzev.de
authors.forename: Melanie
authors.initials: M
authors.lastname: Wiesner
authors.forename: Franziska S
authors.initials: FS
authors.lastname: Hanschen
authors.forename: Monika
authors.initials: M
authors.lastname: Schreiner
authors.forename: Hansruedi
authors.initials: H
authors.lastname: Glatt
authors.forename: Rita
authors.initials: R
authors.lastname: Zrenner
mesh_terms: D000085:Acetates / Q000494:pharmacology*; D001937:Brassica / Q000378:metabolism*; D002851:Chromatography, High Pressure Liquid; D003517:Cyclopentanes / Q000494:pharmacology*; D005786:Gene Expression Regulation / Q000187:drug effects*; D005961:Glucosinolates / Q000032:analysis / Q000096:biosynthesis* / Q000737:chemistry; D007211:Indoles / Q000737:chemistry; D054883:Oxylipins / Q000494:pharmacology*; D018515:Plant Leaves / Q000378:metabolism; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism
chemical_list: D000085:Acetates; D003517:Cyclopentanes; D005961:Glucosinolates; D007211:Indoles; D054883:Oxylipins; D010940:Plant Proteins; C011006:jasmonic acid; C036025:4-methoxy-3-indolylmethyl glucosinolate; C072239:methyl jasmonate