ENGLISH ABSTRACT
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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[Molecular cloning and expression profile of a jasmonate biosynthetic pathway gene allene oxide cyclase from Hyoscyamus niger].

Hyoscyamus niger L. is a medicinal plant which produces a class of jasmonate-responsive pharmaceutical secondary metabolites named as tropane alkaloids. As a family of signaling phytohormones, jasmonates play significant roles in the biosynthesis of many plant secondary metabolites. In jasmonate biosynthetic pathway of plants, allene oxide cyclase (AOC, [...] EC 5.3.99.6 [...]) catalyzes the most important step. Here we cloned a cDNA from H. niger, named HnAOC (GenBank accession: AY708383), which was 1044 bp long, with a 747 bp open reading frame (ORF) encoding a polypeptide of 248 amino acid residues. Southern blot analysis indicated that it was a multi-copy gene. RT-PCR analysis revealed that the expression of HnAOC was regulated by various stresses and elicitors, with methyl-jasmonate showing the most prominent inducement. The characterization of HnAOC would be helpful for improving the production of valuable secondary metabolites by regulating the biosynthesis ofjasmonates.

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