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Titolo:
SOLUBLE SINAPOYL ESTERS ARE CONVERTED TO WALL-BOUND ESTERS IN PHENYLALANINE AMMONIA-LYASE-INHIBITED RADISH SEEDLINGS
Autore:
CHEN MH; GITZ DC; MCCLURE JW;
Indirizzi:
MIAMI UNIV,DEPT BOT OXFORD OH 45056 MIAMI UNIV,DEPT BOT OXFORD OH 45056
Titolo Testata:
Phytochemistry
fascicolo: 2, volume: 49, anno: 1998,
pagine: 333 - 340
SICI:
0031-9422(1998)49:2<333:SSEACT>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
CELL-SUSPENSION CULTURES; PHENOLIC CONSTITUENTS; RAPHANUS-SATIVUS; DIFERULIC ACID; COLEOPTILES; COMPONENTS; COTYLEDONS; LIGNIN;
Keywords:
RAPHANUS SATIVUS; CRUCIFERAE; RADISH; SINAPOYL ESTERS; 2-AMINOINDAN-2-PHOSPHONIC ACID (AIP); PHENYLALANINE AMMONIA LYASE (PAL); PHENOLIC TRANSPORT; HYPOCOTYL ELONGATION; WALL-BOUND PHENOLICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
M.H. Chen et al., "SOLUBLE SINAPOYL ESTERS ARE CONVERTED TO WALL-BOUND ESTERS IN PHENYLALANINE AMMONIA-LYASE-INHIBITED RADISH SEEDLINGS", Phytochemistry, 49(2), 1998, pp. 333-340

Abstract

Between the third and eighth day of radish seedling growth, wall-bound esters of (E)-sinapic and (E)-p-coumaric acids increase about fourfold, (E)-ferulic acid about sixfold, in the cotyledons. In the hypocotyl plus roots, wall-bound ferulic and p-coumaric acids increase twofoldbut wall-bound sinapic acid levels are unchanged. When grown with !00mu M 2-aminoindan-2-phosphonic acid (AIP), a competitive inhibitor ofphenylalanine ammonia-lyase (PAL), cotyledons had levels of wall-bound sinapic acid similar to controls but there was no detectable wall-bound p-coumaric acid and only traces of wall-bound ferulic acid. As seedlings developed, their decrease in soluble sinapoyl esters greatly exceeded levels of wall bound sinapic acid accumulated. We interpret this as evidence that de novo hydroxycinnamic acid synthesis was blocked and preformed soluble sinapoyl esters stored in the cotyledons were mobilized and esterified into developing cell walls. Growth with 5 mu M AIP inhibited wall-bound p-coumaric and ferulic acid accumulation morethan 90% in the hypocotyl plus roots and slightly increased hypocotylelongation, suggesting that wall-bound phenolics may normally play a role in restricting radish hypocotyl cell wall extensibility. (C) 1998Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 20:19:48