Journal of Stress Physiology & Biochemistry, Vol. 6 No. 4
2010, pp. 126-134 ISSN 1997-0838
Original Text Copyright (cc) 2010 by Alen’kina, Nikitina
ORIGINAL
ARTICLE
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Azospirillum lectin – induced changes in the content of
nitric oxide in wheat seedling roots
Alen’kina S.A. , Nikitina V.E.
Institute of Biochemistry and
Physiology of Plants and Microorganisms, Russian Academy of Sciences,
13 Prospekt Entuziastov, Saratov 410049, Russian Federation E-mail: alenkina@ibppm.sgu.ru
Received October 30, 2010
The lectin of Azospirillum
brasilense
Sp7 at 40 μg ml-1 elicited two peaks of induction of nitric oxide
synthesis in the roots of wheat seedlings after 3 and 26 h of
coincubation. The lectin of A.
brasilense
Sp7.2.3, a mutant defective in lectin activity, produced the same
effect, but the activation of nitric oxide synthesis in the roots was
less in the case of 26-h incubation. Exposure to the lectins for 3 h
increased citrulline synthesis in the plant cell to the same extent.
This finding indicated that the Azospirillum
lectins activate nitric oxide production through the NO signal system
of plants, thereby acting as inducers of adaptation processes in the
roots of wheat seedlings.
