A. N. Ershova* and V. A. Khripach**
* Department of Botany, Voronezh Pedagogical University, Voronezh, ul. Lenina 86, 394611 Russia
** Institute of Bioorganic Chemistry, Belarussian Academy of Sciences, Minsk, ul. Zhodinskaya 5/2, 220141 Belarus
Received May 29, 1995
Abstract—The effect of epibrassinolide on oxidative lipid degradation in pea seedlings was studied at normal
aeration and in oxygen-deprived and CO2-enriched media. The content of various products of lipid peroxidation
(POL), including the primary derivatives (conjugated dienoic acids) and end products (malonyl dialdehyde,
MDA), was shown to decrease in seedlings treated with epibrassinolide (10 mg/l). Epibrassinolide inhibited
POL in pea seedlings more strongly than kinetin. These effects became even more pronounced in plants under
hypoxia or in the CO2-enriched medium. The content of conjugated dienes declined by 13 and 21% at hypoxia
and in the CO2-medium compared to their content in air-grown seedlings, whereas the content of MDA was 38
and 26% below the level in the untreated plants, respectively. We presume that as a protector, epibrassinolide
can inhibit the oxidative degradation of lipids in biological membranes and prevent the disruption of membrane
structures. Thus it increases the tolerance of plants to deleterious factors.
Key words: Pisum sativum - peroxidation of lipids - epibrassinolide
Pleiades Publishing home page | journal home page | top
If you have any problems with this server, contact webmaster.