Journal
RUSSIAN JOURNAL OF PLANT PHYSIOLOGY
Volume 58, Issue 2, Pages 248-252Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S1021443711020051
Keywords
Triticum aestivum; Cucumis sativus; cold tolerance; amidases; cysteine proteinases; trypsin inhibitors
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Funding
- Russian Foundation for Basic Research [10-04-00650a]
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On seedlings of winter wheat (Triticum aestivum L.) and cucumber (Cucumis sativus L.), the dynamics of cysteine and serine trypsin-like proteinases and also trypsin inhibitors at cold hardening (5 degrees C for wheat and 10 degrees C for cucumber) was studied. Activation of proteinases and inhibitors coincided in time or preceded an increased tolerance in wheat and cucumber seedlings in the early period of their hardening. After attaining the highest wheat tolerance, activity amidases reduced, whereas the increased activity levels of cysteine proteinases and trypsin inhibitors was maintained during the entire period of hardening. In cucumber, in these period activities of amidases and trypsin inhibitors reduced, whereas the activity of cysteine proteinases was maintained at the level close to the initial one. It is suggested that cysteine proteinases, amidases, and trypsin inhibitors are involved in plant adaptation to cold.
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