Фотоморфогенетична відповідь рослин гороху (Pisum sativum L.) на дію ультрафіолетової радіації

В. В. Жук, О. М. Міхєєв, Л. Г. Овсяннікова

Анотація


Aim. The comparation of photomorphogenetic response of pea plants in wide dose range of UV-C and UV-B irradiation was studied. Methods. Pea plants (Pisum sativum L.) cultivar Aronis were grown in water culture during 10 days and then were irradiated by UV-B and UV-C irradiation in doses 1, 2, 4, 8 and 15 kJ/m2. The length of shoots and roots and fresh weight of pea plants were measured. Results. It is established that UV-C irradiation caused strong inhibition effect on shoot growth against UV-B in the same doses. It is shown that the dose of 8 kJ/m2 was the threshold of the UV-B and UV-C effect. Dose above 8 kJ/m2 caused growth inhibition. The dose of 2 kJ/m2 caused the hormesis effect. Stem growth inhibition under the UV-C stimulated root growth. Conclusions. Comparative study of UV-B and UV-C irradiation demonstrated that the hormesis effect on plant growth was shown in the same dose of 2 kJ/m2. The inhibition effect of UV-C irradiation was stronger than UV-B in the same doses.

Keywords: UV-B, UV-C, Pisum sativum L., hormesis.


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