Response of photosynthetic apparatus in Arabidopsis thaliana L. mutant deficient in phytochrome A and B to UV-B
| Autor: | Vladimir D. Kreslavski, G. A. Semenova, A. Yu. Khudyakova, A. N. Shmarev, G. N. Shirshikova, Suleyman I. Allakhverdiev, Sergey K. Zharmukhamedov, V. Yu. Lyubimov |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine chemistry.chemical_classification Photosystem II biology Physiology Wild type Plant physiology Plant Science Photosynthesis biology.organism_classification 01 natural sciences Chloroplast 03 medical and health sciences Phytochrome A 030104 developmental biology chemistry Botany Biophysics Arabidopsis thaliana Carotenoid 010606 plant biology & botany |
| Zdroj: | Photosynthetica. 56:418-426 |
| ISSN: | 1573-9058 0300-3604 |
| Popis: | The effects of UV-B radiation (1 W m–2, 1 and 2 h) on PSII activity, chloroplast structure, and H2O2 contents in leaves of 26-d-old Arabidopsis thaliana phyA phyB double mutant (DMut) compared with the wild type (WT) were investigated. UV-B decreased PSII activity and affected the H2O2 content in WT and DMut plants grown under white light (WL). The chloroplast structure changes in DMut plants exposed to UV were more significant than that in WT. Reductions in maximal and real quantum photochemical yields and increase in the value of thermal dissipation of absorbed light energy per PSII RC and the amount of QB-nonreducing centers of PSII were bigger in mutant compared to WT plants grown both under WL and red light. Such difference in action of UV-B on WT and DMut can be explained by higher content of UV-absorbing pigments and carotenoids in WT leaves compared with DMut. |
| Databáze: | OpenAIRE |
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