Plant Physiol. Drug Metab Dispos
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Plant Physiology 75:1075-1079 (1984)
© 1984 American Society of Plant Biologists

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Singh, J.
Right arrow Articles by Bewley, J. D.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Singh, J.
Right arrow Articles by Bewley, J. D.
Agricola
Right arrow Articles by Singh, J.
Right arrow Articles by Bewley, J. D.
Articles

Membrane Organization of the Desiccation-Tolerant Moss Tortula ruralis in Dehydrated States 1

Jas Singh, Barbara A. Blackwell, Richard W. Miller and J. Derek Bewley

Chemistry and Biology Research Institute, Agriculture Canada, Ottawa, Ontario, K1A 0C6, Canada, Plant Physiology Research Group, Department of Biology, University of Calgary, Calgary, Alberta T2N 1N4, Canada

Membrane organization of the desiccation tolerant moss Tortula ruralis was studied in several intensely dehydrated states (75% relative humidity [RH], 90% RH, plasmolysis in molar salt, freezing to –20°C) by 31P nuclear magnetic resonance and ultrastructural analyses. Both methods revealed that even at 75% RH (–400 bars), the moss cellular membranes retained extended phospholipid bilayers. Ultrastructural analyses of the fully hydrated moss showed an extensive proliferation of membrane vesicles in the endoplasmic reticulum. During dehydration, these vesicles form layers of membrane under the plasmalemma and in some cases appear to fuse with the surface membrane. This suggests that these vesicles may serve as a reservoir of membranes to accommodate for membrane surface area changes during desiccation and subsequent rehydration.

1 Chemistry and Biology Research Institute publication No. 1420. Part of this work was published in abstract form at the 25th Annual Meeting of the Canadian Society of Plant Physiologists, University of Waterloo, Waterloo, Ontario, June 19-22, 1983.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1984 by the American Society of Plant Biologists