UDC 633.16:581.1:57.043

EFFECT OF LOW DOSES OF UV-B RADIATION ON BIOCHEMICAL INDICES AND GROWTH IN BARLEY PLANTS

K.V. Manin, L.I. Goncharova

In microfield experiment the authors investigated the effect of low doses of UV-B radiation (0.9, 1.77, 2.75 kJ/m2) on biochemical and morphophysiological indices in barley plants. Under the radiation action the content of photosynthetic pigments, flavonoids and free proline in leaves is in-creasing, height of stem is raising. The amount of glutathione is reducing, but the amount of ascorbic acid remains constant. During the exposure to radiation in dose of 2.75 kJ/m2 the concentration of malonic dialdehyde is decreasing, but the plant biomass is increasing.

Keywords: low dozes UV-B radiation, photosynthetic pigments, chlorophylls, carotenoids, malondialdehyde (MDA), antioxidative system, free proline, flavonoids, ascorbate and glutathione.

ГНУ Всероссийский НИИ сельскохозяйственной радиологии и агроэкологии Россельхозакадемии,
249032 Калужская обл., г. Обнинск, Киевское ш., 109 км,
e-mail: maninkv@mail.ru

Received June 17, 2009

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