Antioxidant defense system participation in cross-adaptation of Ocimum basilicum to complex action of UV-B and salinity

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Abstract

The 10 min UV-B irradiation (12 dj/m2) and 100mM NaCl action on medical plants Ocimum basilicum L., grown in water culture, was studying. The plants treated by UV-B irradiation were more resistent to salinity. There were two groups of compounds. One - proline, carotinoids, phenols are accumulated under salinity conditions. Second group - pigments - antocyans and flavones. Its biosynthesis is stimulated by UV-B irradiation. Under complex stressor action pigments were increased and this increasing helped plants to overcome the high salinity. The antioxidant enzyme superoxid dismutase did not play essential role in adaptive response. The low molecular weight antioxidants were more effective for formation of adaptation response. The peroxidase activity had not correlation with superoxid dismutase activity and we supposed that H2O2 could be result of other process and served as signal molecul.

About the authors

W IM Toaima

Russian People's Friendship University

Кафедра ботаники, физиологии, патологии растений и агробиотехнологии; Российский университет дружбы народов; Russian People's Friendship University

N L Radyukina

Botanicheskaya str., 35, Moscow, Russia, 127276

Институт физиологии растений им. К.А. Тимирязева РАН; Botanicheskaya str., 35, Moscow, Russia, 127276

G A Dmitrieva

Russian People's Friendship University

Email: dmitga@yandex.ru
Кафедра ботаники, физиологии, патологии растений и агробиотехнологии2Институт физиологии растений им. К.А. Тимирязева РАНул. Ботаническая, 35, Москва, Россия, 127276; Российский университет дружбы народов; Russian People's Friendship University

Vl V Kuznetsov

Russian People's Friendship University

Email: vlkuzn@ippras.ru
Кафедра ботаники, физиологии, патологии растений и агробиотехнологии2Институт физиологии растений им. К.А. Тимирязева РАНул. Ботаническая, 35, Москва, Россия, 127276; Российский университет дружбы народов; Russian People's Friendship University

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Copyright (c) 2010 Тоайма В.И., Радюкина Н.Л., Дмитриева Г.А., Кузнецов В.В.

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