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Titolo:
Unravelling cell wall formation in the woody dicot stem
Autore:
Mellerowicz, EJ; Baucher, M; Sundberg, B; Boerjan, W;
Indirizzi:
Swedish Univ Agr Sci, Dept Forest Genet & Plant Physiol, S-90183 Umea, Sweden Swedish Univ Agr Sci Umea Sweden S-90183 t Physiol, S-90183 Umea, Sweden Free Univ Brussels, Lab Plant Biotechnol, B-1160 Brussels, Belgium Free Univ Brussels Brussels Belgium B-1160 nol, B-1160 Brussels, Belgium Flanders Interuniv, Inst Biotechnol, Dept Plant Genet, B-9000 Ghent, Belgium Flanders Interuniv Ghent Belgium B-9000 ant Genet, B-9000 Ghent, Belgium
Titolo Testata:
PLANT MOLECULAR BIOLOGY
fascicolo: 1-2, volume: 47, anno: 2001,
pagine: 239 - 274
SICI:
0167-4412(2001)47:1-2<239:UCWFIT>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
CINNAMYL ALCOHOL-DEHYDROGENASE; TRANSGENIC TOBACCO PLANTS; CAFFEOYL-COENZYME-A; PHENYLALANINE AMMONIA-LYASE; O-METHYLTRANSFERASE ACTIVITY; CYTOCHROME P450-DEPENDENT MONOOXYGENASE; ALTERED LIGNIN COMPOSITION; ASPEN POPULUS-TREMULOIDES; AESCULUS-HIPPOCASTANUM L; ISOLATED MESOPHYLL-CELLS;
Keywords:
expressed sequence tag; hybrid aspen; Populus; vascular cambium; wood formation; xylem cell wall;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
320
Recensione:
Indirizzi per estratti:
Indirizzo: Sundberg, B Swedish Univ Agr Sci, Dept Forest Genet & Plant Physiol, S-90183 Umea, Sweden Swedish Univ Agr Sci Umea Sweden S-90183 -90183 Umea, Sweden
Citazione:
E.J. Mellerowicz et al., "Unravelling cell wall formation in the woody dicot stem", PLANT MOL B, 47(1-2), 2001, pp. 239-274

Abstract

Populus is presented as a model system for the study of wood formation (xylogenesis). The formation of wood (secondary xylem) is an ordered developmental process involving cell division, cell expansion, secondary wall deposition, lignification and programmed cell death. Because wood is formed in a variable environment and subject to developmental control, xylem cells are produced that differ in size, shape, cell wall structure, texture and composition. Hormones mediate some of the variability observed and control the process of xylogenesis. High-resolution analysis of auxin distribution across cambial region tissues, combined with the analysis of transgenic plants with modified auxin distribution, suggests that auxin provides positional information for the exit of cells from the meristem and probably also for theduration of cell expansion. Poplar sequencing projects have provided access to genes involved in cell wall formation. Genes involved in the biosynthesis of the carbohydrate skeleton of the cell wall are briefly reviewed. Most progress has been made in characterizing pectin methyl esterases that modify pectins in the cambial region. Specific expression patterns have also been found for expansins, xyloglucan endotransglycosylases and cellulose synthases, pointing to their role in wood cell wall formation and modification. Finally, by studying transgenic plants modified in various steps of the monolignol biosynthetic pathway and by localizing the expression of various enzymes, new insight into the lignin biosynthesis in planta has been gained.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 20:53:52