Involvement of oxyradicals in promotion/inhibition of expansion growth in cucumber cotyledons.
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2005-10-21
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Abstract
Cytokinin-induced expansion growth of cucumber cotyledons and its interaction with UV-B (280-320 nm) was studied with reference to oxyradicals. UV-B radiation enhanced the level of oxyradicals in the cotyledons measured by EPR spectroscopy. Cytokinin promoted expansion growth was inhibited by UV-B radiation. Cytokinins reduced the level of oxyradicals in dark grown cotyledons, while promoting growth. Overproduction of oxyradicals by UV-B could not be fully accounted for the inhibition of growth of cotyledons, since quenching of radicals by cytokinins did not fully restore inhibition of growth.
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Kataria S, Jain K, Guruprasad KN. Involvement of oxyradicals in promotion/inhibition of expansion growth in cucumber cotyledons. Indian Journal of Experimental Biology. 2005 Oct; 43(10): 910-5