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Response of barley seedlings to oxidative stress generated by treatments with growth hormones

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Author(s): Zenovia Olteanu | Elena Truta | Lacramiora Oprica | Maria Magdalena Zamfirache

Journal: Analele Ştiinţifice Ale Universităţii Alexandru Ioan Cuza din Iași,Sectiunea II A : Genetica si Biologie Moleculara
ISSN 1582-3571

Volume: 10;
Issue: 1;
Start page: 29;
Date: 2009;
Original page

ABSTRACT
The effects induced by growth hormone regulators on soluble protein level and some oxidoreductases in Hordeum vulgare cv. Madalin seedlings were investigated. The study of superoxide dismutase, catalyse and peroxidase behaviour and of protein synthesis was realized in dynamics to evaluate the response of barley seedlings to oxidative stress generated by exposure to hormone factors. During experiments, peroxidase registered smaller limits of variability than superoxide dismutase and catalase. It seems that superoxide dismutase and catalase rather than peroxidase acted as components of an antioxidative protective system. Generally, the protein level not presented significant modifications in early stage, but at 6 days, the major part of variants responded by amplification of protein synthesis, excepting some kinetin and GA3 concentrations. In final stage, both control and hormone variants reduced their protein synthesis

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