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Plant Physiology 74:21-25 (1984)
© 1984 American Society of Plant Biologists

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Plant Desiccation and Protein Synthesis. IV. RNA Synthesis, Stability, and Recruitment of RNA into Protein Synthesis during Desiccation and Rehydration of the Desiccation-Tolerant Moss, Tortula ruralis1

Melvin J. Oliver2 and J. Derek Bewley

Plant Physiology Research Group, University of Calgary, Calgary, Alberta T2N 1N4 Canada

Upon rehydration of desiccated Tortula ruralis, RNA synthesis is immediately resumed; this resumption is quicker in moss recovering from slow drying than from rapid drying. Newly synthesized RNA enters the protein synthetic complex almost immediately upon rehydration, reaching control steady state levels within 2 hours after slow drying and 6 hours after rapid drying. RNA synthesized in the 1st hour following the readdition of water enters into polysomes much earlier after slow drying than after rapid drying. The RNA components of the protein synthetic complex are stable to desiccation at either slow or rapid speeds, although more so following the former drying regime. Immediately upon rehydration, these conserved RNA are readily utilized for protein synthesis, and continue to be so at least 4 hours thereafter. Hence, the speed of desiccation affects the rate at which RNA is synthesized upon subsequent rehydration, as well as the mode of utilization of that RNA.

2 Present address: Department of Biology, Washington University, St. Louis, MO 63130.

1 Supported by Natural Sciences and Engineering Research Council of Canada Grant A6352 to J. D. B.




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A. J. Wood, R. Joel Duff, and M. J. Oliver
The translational apparatus of Tortula ruralis: polysomal retention of transcripts encoding the ribosomal proteins RPS14, RPS16 and RPL23 in desiccated and rehydrated gametophytes
J. Exp. Bot., October 1, 2000; 51(351): 1655 - 1662.
[Abstract] [Full Text] [PDF]


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Copyright © 1984 by the American Society of Plant Biologists