Journalartikel

Jahr der Veröffentlichung: 1979

Seiten: 331-337

Zeitschrift: Planta

Bandnummer: 145

Heftnummer: 4

ISSN: 0032-0935

eISSN: 1432-2048

DOI Link: https://doi.org/10.1007/BF00388357

Verlag: Springer

Abstract: 
The synthesis of cell wall mannan and the activities of guanosine-diphosphate-mannose-pyrophosphorylase (EC 2.7.7.13) and mannan synthetase were studied during the development of nucleate and enucleated cells of the alga A. mediterranea. The activities of both enzymes are relatively high as long as the cells grow and synthesize mannans. With termination of growth and mannan synthesis, the activities of both enzymes, especially mannan synthetase, drop to a low value. The activities of both enzymes are distributed in the cell along an apical-basal gradient. High activities are present in the apical regions of the cell where growth and mannan synthesis mainly occur. In the basal region, growth, mannan synthesis and the activity of the 2 enzymes are slight. The in vitro activity of GDP-Man-pyr is at least 100 times higher than that of mannan synthetase; mannan synthetase activity is apparently the limiting factor in mannan synthesis. This conclusion is supported by the pool sizes of Fru 6-P, Man 6-P, Man 6-P and GDP-Man during the development of the cells. The control of mannan synthesis and cell wall formation and growth through the regulation of mannan synthetase activity is discussed.

Harvard-Zitierstil: BACHMANN, P. and ZETSCHE, K. (1979) CLOSE TEMPORAL AND SPATIAL CORRELATION BETWEEN CELL-GROWTH, CELL-WALL SYNTHESIS AND THE ACTIVITY OF ENZYMES OF MANNAN SYNTHESIS IN ACETABULARIA-MEDITERRANEA, Planta, 145(4), pp. 331-337. https://doi.org/10.1007/BF00388357

APA-Zitierstil: BACHMANN, P., & ZETSCHE, K. (1979). CLOSE TEMPORAL AND SPATIAL CORRELATION BETWEEN CELL-GROWTH, CELL-WALL SYNTHESIS AND THE ACTIVITY OF ENZYMES OF MANNAN SYNTHESIS IN ACETABULARIA-MEDITERRANEA. Planta. 145(4), 331-337. https://doi.org/10.1007/BF00388357