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  Two glucosyltransferases are involved in detoxification of benzoxazinoids in maize

von Rad, U., Huttl, R., Lottspeich, F., Gierl, A., & Frey, M. (2001). Two glucosyltransferases are involved in detoxification of benzoxazinoids in maize. Plant Journal, 28(6), 633-642.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-70F0-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-70F1-C
Genre: Journal Article
Alternative Title : Plant J.

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 Creators:
von Rad, U., Author
Huttl, R., Author
Lottspeich, F.1, Author              
Gierl, A., Author
Frey, M., Author
Affiliations:
1Lottspeich, Friedrich / Protein Analysis, Max Planck Institute of Biochemistry, Max Planck Society, ou_1565158              

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Free keywords: glucosyltransferase; secondary metabolites; benzoxazinoid biosynthesis; allelopathy; maize genes
 Abstract: Benzoxazinoids are major compounds involved in chemical defence in grasses. These toxins are stored in the vacuole as glucosides. Two glucosyltransferases, BX8 and BX9, that catalyse this last step of benzoxazinoid biosynthesis have been isolated via functional cloning. No close relative of these maize genes was found among the known glucosyltransferases. The enzymes display a very high degree of substrate specificity. DIMBOA, the major benzoxazinoid in young maize, is the preferred substrate. Both genes are highly expressed in young maize seedlings, the developmental stage with the highest activity of benzoxazinoid biosynthesis. Bx8 is included in the cluster of DIMBOA biosynthesis genes located on the short arm of chromosome 4. Hence, the gene cluster comprises three different enzymatic functions and a complete set of genes for the biosynthesis of DIBOA glucoside. Bx9 mapped to chromosome 1. Expression of Bx8 and Bx9 in Arabidopsis corroborated the potency of the enzymes in detoxification of their substrates. This capacity might have implications for allelopathic interactions.

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Language(s): eng - English
 Dates: 2001-12
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 35294
ISI: 000173421000003
 Degree: -

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Title: Plant Journal
  Alternative Title : Plant J.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 28 (6) Sequence Number: - Start / End Page: 633 - 642 Identifier: ISSN: 0960-7412