Differential protection of ethylenediurea (EDU) against ambient ozone for five cultivars of tropical wheat |
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| Authors: | Shalini Singh SB Agrawal Madhoolika Agrawal |
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| Institution: | 1. State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, The Chinese Academy of Sciences, No. 20 Nanxincun, Xiangshan, Beijing 100093, PR China;2. University of Chinese Academy of Sciences, No. 19 Yuquanlu, Beijing 100049, PR China;3. Agriculture and Natural Resources Department, University of Minnesota Crookston, 2900 University Avenue, Crookston, MN 56716-5001, USA;1. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing 100085, China;2. Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan;3. Department of Biological and Environmental Sciences, University of Gothenburg, P.O. Box 461, 40530 Gothenburg, Sweden;4. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing 210008, China;1. State key laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing, 100085, China;2. University of Chinese Academy of Sciences, Shijingshan District, Beijing 100049, China;3. Key Laboratory of Urban Agriculture (North) of Ministry of Agriculture P. R. China, Beijing University of Agriculture, Beijing 102206, China;4. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A, Datun Road, Chaoyang District, Beijing, 100101, China;5. Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003-9320, USA |
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| Abstract: | The antiozonant EDU (ethylenediurea) was used to assess the impact of ambient O3 under field conditions on five cultivars of tropical wheat (Triticum aestivum L.). EDU solution (0 ppm and 400 ppm) was applied as soil drench (100 ml plant?1) 10 days after germination (DAG) at an interval of 12 days. EDU-treated plants showed significant increments in stomatal conductance, photosynthetic rate, variable fluorescence, total chlorophyll, ascorbic acid, proline and protein contents and protective enzymes (POX, SOD and APX) activities in HUW468, HUW510 and HUW234 cultivars, while, a reverse trend was observed for lipid peroxidation. EDU application restored grain yield significantly by maintaining higher levels of antioxidants, metabolites and enzymes in cultivars HUW468 and HUW510. Sonalika and PBW343 showed least response of measured parameters under EDU treatment suggesting their greater resistance to O3. EDU, thus proved its usefulness in screening suitable wheat cultivars for areas experiencing elevated concentrations of O3. |
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