Relationship of Dissociation of Cellular Proteins by Incipient Drought to Physiological Processes

1. The centrifuge method was used to determine the structural viscosity of protoplasm in leaf cells of Mnium sp. and Bryum sp. which had been dried for periods up to 50 minutes. In other experiments with Mnium, dried plants were placed in water and the viscosity determined after periods varying from...

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Bibliographic Details
Published in:Botanical gazette (Chicago, Ill.) Ill.), 1943-03, Vol.104 (3), p.480-485
Main Author: Northen, Henry T.
Format: Article
Language:English
Subjects:
Drought
Enzymes
Hypertonic solutions
Molecules
Plant cells
Plants
Polysaccharides
Respiration
Swelling
Viscosity
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Summary:1. The centrifuge method was used to determine the structural viscosity of protoplasm in leaf cells of Mnium sp. and Bryum sp. which had been dried for periods up to 50 minutes. In other experiments with Mnium, dried plants were placed in water and the viscosity determined after periods varying from 15 to 90 minutes. 2. Incipient drought conditioned a decrease in the structural viscosity as a consequence of protein dissociations. During the recovery period a decrease in viscosity preceded the return to normal. 3. It is suggested that the dissociation of cellular proteins by incipient drought conditions an increased protoplasmic swelling pressure, accelerated rates of respiration and polysaccharide hydrolysis and may at times lead to mitotic abnormalities.
ISSN:0006-8071
DOI:10.1086/335159