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Titolo:
SUPPRESSION OF CELL-WALL STIFFENING ALONG COLEOPTILES OF WHEAT (TRITICUM-AESTIVUM L.) SEEDLINGS GROWN UNDER OSMOTIC-STRESS CONDITIONS
Autore:
WAKABAYASHI K; HOSON T; KAMISAKA S;
Indirizzi:
OSAKA CITY UNIV,FAC SCI,DEPT BIOL,SUMIYOSHI KU,SUGIMOTO 3 OSAKA 558 JAPAN
Titolo Testata:
Journal of plant research
fascicolo: 1099, volume: 110, anno: 1997,
pagine: 311 - 316
SICI:
0918-9440(1997)110:1099<311:SOCSAC>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR-WEIGHT DISTRIBUTIONS; MAXIMA DUCH HYPOCOTYLS; MECHANICAL-PROPERTIES; WATER-STRESS; HEMICELLULOSIC POLYSACCHARIDES; SUGAR COMPOSITIONS; AVENA COLEOPTILES; FERULIC ACID; AUXIN; EXTENSIBILITY;
Keywords:
CELL WALL EXTENSIBILITY; CELL WALL POLYSACCHARIDE; COLEOPTILE; DIFERULIC ACID; FERULIC ACID; WHEAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
41
Recensione:
Indirizzi per estratti:
Citazione:
K. Wakabayashi et al., "SUPPRESSION OF CELL-WALL STIFFENING ALONG COLEOPTILES OF WHEAT (TRITICUM-AESTIVUM L.) SEEDLINGS GROWN UNDER OSMOTIC-STRESS CONDITIONS", Journal of plant research, 110(1099), 1997, pp. 311-316

Abstract

Effects of polyethylene glycol (PEG)-induced osmotic stress on the mechanical properties of cell walls and the levels of their components were investigated along intact wheat (Triticum aestivum L.) coleoptiles. Stress-relaxation analysis showed that the cell walls of stressed coleoptiles were loosened as compared with those of unstressed ones not only in the apical but in the basal regions. The amounts of wall-boundferulic acid (FA) and diferulic acid (DFA) of stressed coleoptiles were substantially lower than those of unstressed ones in all regions. The cellulose and hemicellulose contents increased toward the coleoptile base. Osmotic stress reduced the cellulose content in the basal region but it slightly affected the hemicellulose content. The molecular weight of hemicellulose in the apical region of stressed coleoptiles was higher than that of unstressed ones, while that in the basal region was almost the same in both coleoptiles. FA, DFA and cellulose contents correlated with the cell wall mechanical property. The amount and molecular weight of hemicellulose, however, did not correlate. These results suggest that the reduced levels of FA and DFA in all regions and cellulose in the basal region of wheat coleoptiles are involved in maintaining the cell wall extensibility under osmotic stress.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 14:23:13