Redox regulation of water stress responses in field-grown plants. Role of hydrogen peroxide and ascorbate |
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| Authors: | T Jubany-Marí S Munné-Bosch L Alegre |
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| Institution: | 1. Faculty of Agriculture, Azarbaijan Shahid Madani University, Tabriz, Iran;2. Department of Medicinal Plants, Faculty of Agriculture and Natural Resources, Arak University, 38156-8-8349 Arak, Iran;3. Department of Plant Physiology, Slovak University of Agriculture, Nitra, Slovakia;1. The New Zealand Institute for Plant & Food Research Limited, 412 No 1 Road, RD 2, Te Puke 3182, New Zealand;2. The New Zealand Institute for Plant & Food Research Limited, Food Industry Science Centre, Batchelar Road, Palmerston North 4474, New Zealand;1. Department of Animal Science, Institute of Agricultural Science and Technology, College of Agriculture & Life Science, Chonnam National University, Buk-Gwangju P.O Box 205, Gwangju 500-600, Republic of Korea;2. Biotechnology Research Institute, Chonnam National University, Gwangju 500-757, Republic of Korea;3. Université de Caen Basse-Normandie, Esplanade de la Paix, F-14032 Caen Cedex, France;4. UCBN, UMR INRA-UCBN 950 Ecophysiologie Végétale, Agronomie et Nutritions N, C, S, Esplanade de la Paix, 14032 Caen Cedex, France;1. Department of Biochemistry, Faculty of Science, Palacký University, ?lechtitel? 27, CZ-783 71 Olomouc, Czech Republic;2. Department of Biochemistry, Faculty of Science, Masaryk University, Kamenice 753/5, CZ-625 00 Brno, Czech Republic |
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| Abstract: | Abiotic stresses, such as drought, can increase the production of reactive oxygen species (ROS) in plants. An increase in ROS levels can provoke a partial or severe oxidation of cellular components inducing redox status changes, so continuous control of ROS and therefore of their metabolism is decisive under stress conditions. The present work focuses on the contribution of one pro-oxidant, hydrogen peroxide (H2O2) and one antioxidant, ascorbate (AA) and its redox status, in the control of plant responses to drought-oxidative stress in resistant plants growing in field conditions. After a general introduction to the concept of drought and oxidative stress and its relationship, we describe the role of H2O2 in drought stress responses, emphasizing the importance of studies in H2O2 subcellular localization, needed for a better understanding of its role in plant responses to stress. Although more studies are needed in the study of changes of redox status in plants subjected to stress, the AA pools and its redox status can be indicative of its involvement as a part of cellular mechanisms by which the plant respond to drought-induced oxidative stress. The mechanism of resistance and/or tolerance to drought-oxidative stress is complex, especially when studies are carried out in plants growing in field conditions, where an interaction of stresses occurs. This study sheds light on the mechanisms of plant responses to water-oxidative stress in plants growing in the field. |
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