Journal of Stress Physiology & Biochemistry, Vol. 2, No. 1,
2006, pp. 50-55.
Original Text Copyright (cc) 2006 by Klimenko, Peshkova, Dorofeev
ORIGINAL
ARTICLE
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NITRATE REDUCTASE
ACTIVITY DURING HEAT SHOCK IN
WINTER WHEAT
Klimenko S.B., Peshkova A.A.,
Dorofeev N.V
Siberian
Institute of Plant
Physiology and Biochemistry, SD RAS, Irkutsk, Russia Phone: (3952)424659 Fax:
(3952)510754 E-mail: dorofeev@sifibr.irk.ru
Received 18 January 2006 г.
Abstract - Nitrates are the basic
source of nitrogen for the majority
of plants. Absorption and transformation of nitrates in plants are
determined by external conditions and, first of all, temperature and
light intensity. The influence of the temperature increasing till +40 0С
on activity of nitrate reductase was studied. It is shown, that the
rise of temperature was accompanied by sharp decrease of activity
nitrate reductase in leaves of winter wheat, what, apparently, occurred
for the account deactivations of enzyme and due to its dissociation.
