Effects of Cold Hardening on the Regulation of Polyamine Levels in Wheat (Triticum aestivum L.) and Alfalfa (Medicago sativa L.)
Year: 1987
Type: article
Abstract: When leaves of wheat (Triticum aestivum L.) are exposed to a cold hardening temperature, a major accumulation of putrescine (6-9 times) takes place. Spermidine accumulates to a lesser extent and, conversely, spermine decreases slightly. These variations are completely reversible when plants are returned to initial growing conditions. A similar response is obtained with crowns. During cold hardening, arginine decarboxylase activity remains near its initial level while a considerable loss of activity is observed in control plants. Ornithine decarboxylase and diamine oxidase activity levels are not substantially modified by the treatment. Alfalfa (Medicago sativa L.) also accumulates putrescine under low temperature stress, indicating that this phenomenon is not typical of cereals. The physiological significance of this accumulation of putrescine is still unexplained but the results obtained suggest the involvement of polyamines in the biochemical processes of cold hardening.
Source: PLANT PHYSIOLOGY
DOI: 10.1104/pp.84.1.73
Authors: Paul Nadeau, Sandra Delaney, Lucette Chouinard
Institution: Agriculture and Agri-Food Canada
Language: English
Subfield: Molecular Biology
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2076116989