Aspects of the Drought Tolerance in Creosotebush (Larrea divaricata)

In order to understand better the physiological adaption of creosotebush (Larrea divaricata Cav.) to drought conditions, its carbohydrate and nitrogen metabolism after a 7-day desiccation period under controlled conditions were studied. Although fructose was not significantly altered in the leaves o...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 1968-03, Vol.43 (3), p.401-404
Main Authors: Saunier, R. E., Hull, H. M., Ehrenreich, J. H.
Format: Article
Language:English
Subjects:
Amino acids
Dehydration
Drought
Ethanol
Hydrolysis
Leaves
Nitrogen
Nitrogen metabolism
Plants
Sugars
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Summary:In order to understand better the physiological adaption of creosotebush (Larrea divaricata Cav.) to drought conditions, its carbohydrate and nitrogen metabolism after a 7-day desiccation period under controlled conditions were studied. Although fructose was not significantly altered in the leaves of desiccated plants, as compared to those maintained under normal moisture conditions, both glucose and sucrose were significantly reduced. Total amino acids more than doubled under moisture stress, the increase being predominantly due to proline, phenylalanine, and glutamic acid. Significant increases also occurred in alanine, arginine, histidine, isoleucine, and valine. Increases or decreases in other amino acids were not significant. These stress-induced changes in certain amino acids are considered in relationship to protein hydrolysis, to accumulation of nitrogen degradation products translocated from the roots, and to the possible function of specific amino acids (e.g., proline) in $\text{NH}_{3}{}^{+}$ storage.
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.43.3.401