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Titolo:
TRANSPORT, DEGRADATION AND CELL WALL-INTEGRATION OF XXFGOL, A GROWTH-REGULATING NONASACCHARIDE OF XYLOGLUCAN, IN PEA STEMS
Autore:
WARNECK HM; FULTON DC; SEITZ HU; FRY SC;
Indirizzi:
UNIV EDINBURGH,INST CELL & MOL BIOL,EDINBURGH CELL WALL GRP,DANIEL RUTHERFORD BLDG,KINGS BLDG EDINBURGH EH9 3JH MIDLOTHIAN SCOTLAND UNIV EDINBURGH,INST CELL & MOL BIOL,EDINBURGH CELL WALL GRP EDINBURGHEH9 3JH MIDLOTHIAN SCOTLAND UNIV TUBINGEN,INST BOT D-72076 TUBINGEN GERMANY
Titolo Testata:
Planta
fascicolo: 1, volume: 204, anno: 1998,
pagine: 78 - 85
SICI:
0032-0935(1998)204:1<78:TDACWO>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
AUXIN-STIMULATED GROWTH; L-FUCOSE; OLIGOSACCHARIDES; ENDOTRANSGLYCOSYLASE; PURIFICATION; ELONGATION; INHIBITION; FUCOSIDASE; XYLOSIDASE; EXPANSION;
Keywords:
CELL WALL SIGNALING; ENDOTRANSGLYCOSYLASE ACTION; OLIGOSACCHARIN; PISUM STEM (CELL EXPANSION); XYLEM (TRANSLOCATION); XYLOGLUCAN OLIGOSACCHARIDE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
37
Recensione:
Indirizzi per estratti:
Citazione:
H.M. Warneck et al., "TRANSPORT, DEGRADATION AND CELL WALL-INTEGRATION OF XXFGOL, A GROWTH-REGULATING NONASACCHARIDE OF XYLOGLUCAN, IN PEA STEMS", Planta, 204(1), 1998, pp. 78-85

Abstract

When [glucitol-H-3]XXFGol (a (NaBH4)-H-3-reduced xyloglucan nonasaccharide) was applied to excised shoots of pea (Pisum sativum L. cv. Progress) at the base of the epicotyl, it inhibited growth in the elongation zone, 4-5 cm distal. Experiments were conducted to discover whethersuch H-3-oligosaccharides are translocated intact over this distance,or whether an intercellular second messenger would have to be postulated. After 24 h, H-3 from [glucitol-H-3]XXFGol and [glucitol-H-3]XXXGol showed U-shaped distributions, with most H-3 at the base and apex ofthe Radioactivity from [fucosyl-H-3]XXFGol and [xylo-syl-H-3]XXFG also moved acropetally, but did not concentrate at the apex, possibly owing to removal from the transpiration stream of fucose and xylose formed by partial hydrolysis of XXFG en route. When 10(-7) M [glucitol-H-3]XXFGol was supplied, about 14 fmol . seedling(-1) of apparently intact[H-3]XXFGol was extractable from the elongation zone after 24 h, Larger amounts of degradation products were extractable (including free [H-3]glucitol) and some wall-bound PI-hemicellulose was present (presumably formed by the oligosaccharides acting as acceptor substrates for transglycosylation). We conclude that biologically active oligosaccharides of xyloglucan can move through the stem acropetally and that they are maintained at low steady-state concentrations by both hydrolysis and transglycosylation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 12:53:45