[en] The effect of two regimes of UV-B irradiation differing in their duration on the levels of growth and some stress markers in young pea plants was studied. The plants were irradiated daily during 3 weeks for 20 or 60 s. All measurements were made on the 7th, 14th, and 21st day, 20 h after the cessation of the stress programmes. For experiments leaves from different nodes (2nd, 3rd, 4th and 5th) were separated. Growth in higher UV-B radiation resulted in significant reduction of stems' fresh weight. Both stress regimes dropped MDA content. An increase in amounts of free proline, hydrogen peroxide and electrolyte leakage was observed; the effect was more pronounced in the older leaves where more prolonged UV-B was applied. (authors)