Chlorophyll a fluorescence study revealing effects of high salt stress on Photosystem II in wheat leaves |
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| Authors: | Pooja Mehta Anjana Jajoo Sonal Mathur Sudhakar Bharti |
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| Institution: | 1. Department of Genetics, Osmania University, Hyderabad 500 007, India;2. Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad 500 047, India;3. Central Research Institute for Dryland Agriculture, Santoshnagar, Hyderabad 500 059, India;4. International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru 502 324, India;1. Centre of Oceanography of the Faculty of Sciences of the University of Lisbon (CO), Campo Grande, 1749-016 Lisbon, Portugal;2. Institute of Marine Research – Marine and Environment Research Centre (IMAR-CMA), c/o Department of Zoology, Faculty of Sciences and Technology, University of Coimbra, 3000 Coimbra, Portugal;1. Weed Research Laboratory, Nanjing Agricultural University, Nanjing 210095, China;2. Bioenergetics Laboratory, University of Geneva, CH-1254 Jussy/Geneva, Switzerland;1. Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, 29 Gunmgu-gil, Jeongeup-si, Jeollabuk-do 580-185, Republic of Korea;2. Bio-Energy Research Institute, Chonnam National University, Gwangju 500-757, Republic of Korea;3. Department of Applied Life Science, Chonbuk National University, Jeonju 561-756, Republic of Korea;4. Rice Breeding and Cultivation Division, National Institute of Crop Science, 457 Pyeongdong-ro, Iksan, Jeollabuk-Do 570-080, Republic of Korea;1. Department of Plant Physiology, Faculty of Agriculture and Biology, Warsaw University of Life Sciences – SGGW, Nowoursynowska 159, 02-776 Warszawa, Poland;2. Institute of Technology and Life Sciences (ITP), Falenty, Al. Hrabska 3, 05-090 Raszyn, Poland;3. Department of Planting Design and Maintenance, Faculty of Horticulture and Landscape Engineering, Slovak University of Agriculture in Nitra, 949 76 Nitra, Slovakia;4. Department of Environmental Protection, Faculty of Horticulture, Biotechnology and Landscape Architecture, Warsaw University of Life Sciences – SGGW, Nowoursynowska 159, 02-776 Warszawa, Poland;5. Institute for Ecology of Industrial Areas, 6 Kossutha Street, 40-844 Katowice, Poland;6. Department of Plant Physiology, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, 28 Jagiellońska Street, 40-032 Katowice, Poland |
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| Abstract: | In order to study the effects of high salt stress on PS II in detached wheat (Triticum aestivum) leaves, the seedlings were grown in Knop solution and temperature was 20 ± 2 °C. Detached leaves were exposed to high salt stress (0.1–0.5 M NaCl) for 1 h in dark and Chl a fluorescence induction kinetics was measured. Various parameters like Fv/Fm, ABS/RC, ETo/TRo, performance index and area over the florescence curve were measured and the energy pipeline model was deduced in response to salt stress. Our results show that the damage caused due to high salt stress is more prominent at the donor side rather than the acceptor side of PS II. Moreover the effects of high salt stress are largely reversible, as the acceptor side damage is completely recovered (～100%) while the recovery of the donor side is less than 85%. Based on our results we suggest that in response to high salt stress, the donor side of PS II is affected more as compared to the acceptor side of PS II. |
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