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Titolo:
Changes in cell wall architecture of differentiating tracheids of Pinus thunbergii during lignification
Autore:
Hafren, J; Fujino, T; Itoh, T;
Indirizzi:
Swedish Pulp & Paper Res Inst, STFI, S-11486 Stockholm, Sweden Swedish Pulp & Paper Res Inst Stockholm Sweden S-11486 Stockholm, Sweden Kyoto Univ, Wood Res Inst, Uji, Kyoto 611, Japan Kyoto Univ Uji Kyoto Japan 611 Univ, Wood Res Inst, Uji, Kyoto 611, Japan
Titolo Testata:
PLANT AND CELL PHYSIOLOGY
fascicolo: 5, volume: 40, anno: 1999,
pagine: 532 - 541
SICI:
0032-0781(199905)40:5<532:CICWAO>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLANT-CELL; CELLULOSE MICROFIBRILS; DIRECT VISUALIZATION; SOFTWOOD TRACHEIDS; CONIFER TRACHEIDS; RAMAN MICROPROBE; SECONDARY WALL; ORGANIZATION; ARRANGEMENT; MICROTUBULES;
Keywords:
cell wall; delignification; lignification; rapid-freezing deep-etching; Pinus thunbergii; ultrastructure;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Hafren, J Swedish Pulp & Paper Res Inst, STFI, Box 5604, S-11486 Stockholm, Sweden Swedish Pulp & Paper Res Inst Box 5604 Stockholm Sweden S-11486
Citazione:
J. Hafren et al., "Changes in cell wall architecture of differentiating tracheids of Pinus thunbergii during lignification", PLANT CEL P, 40(5), 1999, pp. 532-541

Abstract

The cell wall architecture, before and after lignification, of differentiating tracheids in Pinus thunbergii has been examined using a rapid-freeze deep-etching technique combined with transmission electron microscopy. Replicas of cells from the cambial zone showed that the unlignified primary cellwall was highly porous with microfibrils extensively interconnected by crosslinks. The unlignified secondary cell wall has unidirectional microfibrils, more or less associated in bundles, forming a wavy pattern around pores of characteristic slit-like shape with narrowing ends. As the lignificationprogresses, the cell wall structure becomes dense, with no detectable pores. Delignification of wood samples leads to the reappearance of crosslinks,individual microfibrils and pores in the secondary cell wall, although in a somewhat altered shape. In addition, cellulose-synthesizing enzyme complexes (rosettes) have for the first time been detected on the plasma membraneof differentiating xylem cells of softwood.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 00:21:11