Growth in the UV-A irradiation resistance of the photosynthetic apparatus of lettuce seedlings as a result of activation of phytochrome B |
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| Authors: | V D Kreslavski V Yu Lyubimov N I Shabnova G N Shirshikova A N Shmarev A A Kosobryukhov |
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| Institution: | 1. Institute of Fundamental Problems of Biology, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia
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| Abstract: | This paper studies how UV-A irradiation and preirradiation of 10-day lettuce seedlings (Lactuca sativa L.) with red light (λmax = 664 nm, 10 min, 1 W m?2) affect the activity of the photosynthetic apparatus, content of chlorophylls a and b, and H2O2 in leaves, as well as peroxidase activity. Growth in the UV-A resistance of the photosynthetic apparatus was discovered, and the role of the antioxidant system and phytochrome B in the mechanisms of how the high UV-A resistance of the photosynthetic apparatus is formed was considered. |
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