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Titolo:
INVOLVEMENT OF CELL WALL-BOUND DIFERULIC ACID IN LIGHT-INDUCED DECREASE IN GROWTH-RATE AND CELL-WALL EXTENSIBILITY OF ORYZA COLEOPTILES
Autore:
TAN KS; HOSON T; MASUDA Y; KAMISAKA S;
Indirizzi:
OSAKA CITY UNIV,FAC SCI,DEPT BIOL,SUMIYOSHI KU OSAKA 558 JAPAN
Titolo Testata:
Plant and Cell Physiology
fascicolo: 2, volume: 33, anno: 1992,
pagine: 103 - 108
SICI:
0032-0781(1992)33:2<103:IOCWDA>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
AUXIN-INDUCED CHANGES; FERULIC ACID; CARBOHYDRATE ESTERS; BARLEY ALEURONE; POLYSACCHARIDES; COMPONENTS; RELEASE;
Keywords:
CELL WALL EXTENSIBILITY; COLEOPTILE; DIFERULIC ACID; FERULIC ACID; ORYZA; WHITE LIGHT;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
K.S. Tan et al., "INVOLVEMENT OF CELL WALL-BOUND DIFERULIC ACID IN LIGHT-INDUCED DECREASE IN GROWTH-RATE AND CELL-WALL EXTENSIBILITY OF ORYZA COLEOPTILES", Plant and Cell Physiology, 33(2), 1992, pp. 103-108

Abstract

Irradiation of white fluorescent light (5 W m-2) inhibited the growthof Oryza coleoptiles. Light irradiation increased stress-relaxation parameters of coleoptile cell walls, minimum stress-relaxation time andrelaxation rate, and decreased cell wall extensibility (strain/load). Under light conditions, the contents of ferulic and diferulic acids ester-linked to the hemicellulosic arabinose residue in cell walls increased and correlated with the modification of the cell wall mechanicalproperties. These results suggest that light irradiation enhances theformation of diferulic acid bridges in hemicelluloses, making cell walls mechanically rigid and thus inhibits cell elongation in rice coleoptiles. Also, irrespective of coleoptile age or the presence of light,the ratio of diferulic acid to ferulic acid was almost constant, suggesting that the rate limiting step in the formation of diferulic acid bridges in Oryza cell walls is in the step of feruloylation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 12:43:00