Changes in Calcium-ATPase Activity Associated with the Washing (Ageing) of Potato Tuber Discs

Copyright © 1984 Gustav Fischer Verlag, Stuttgart. Published by Elsevier GmbH.. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Journal of plant physiology. - 1979. - 117(1984), 1 vom: 01. Nov., Seite 69-79
1. Verfasser: Fakhrai, H (VerfasserIn)
Weitere Verfasser: Hall, J L
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 1984
Zugriff auf das übergeordnete Werk:Journal of plant physiology
Schlagworte:Journal Article
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520 |a ATPase activity in cell wall and microsomal fractions from fresh and washed potato tuber discs was measured. The activity was markedly stimulated by Ca(2+) whereas K(+) and Na(+) had little effect. The Ca(2+)-ATPase increased with washing, particularly in the cell wall fractions and in the low density fractions after discontinuous sucrose gradient centrifugation. The activities of succinic dehydrogenase and cytochrome-c-oxidase also increased with disc washing, although activity was highest in the denser regions of the gradient. A fine structural study of fresh and washed tissues revealed a pronounced increase in the membrane profile concentration of the endoplasmic reticulum and mitochondria after ageing for 24 hours 
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