Differential protection of ethylenediurea (EDU) against ambient ozone for five cultivars of tropical wheat

• Published in: Environmental pollution (1987) Vol. 157; no. 8; pp. 2359 - 2367
• Main Authors: Singh, Shalini, Agrawal, S.B., Agrawal, Madhoolika
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.08.2009; Elsevier
• Subjects: Agriculture - methods; air pollution; Air Pollution - statistics & numerical data; air quality; Animal, plant and microbial ecology; Antioxidants; Antioxidants - metabolism; Antioxidants - pharmacology; Applied ecology; Ascorbate Peroxidases - metabolism; Biological and medical sciences; Chlorophyll - metabolism; Cultivars; Ecotoxicology, biological effects of pollution; EDU; Fundamental and applied biological sciences. Psychology; General aspects; Ozone; Ozone - toxicity; Peroxidase - metabolism; Phenylurea Compounds - metabolism; Phenylurea Compounds - pharmacology; photosynthesis; Photosynthetic rate; plant biochemistry; plant physiology; plant protection; Superoxide Dismutase - metabolism; Triticum - drug effects; Triticum - growth & development; Triticum - metabolism; Triticum aestivum; Tropical Climate; tropics; Wheat; India; Antioxidants; Ozone; Photosynthetic rate; Wheat; EDU; Cultivars; Monocotyledones; Tropical zone; Antioxidant; Climatic zone; Pollution; Gramineae; Angiospermae; Cereal; Environment; Spermatophyta; Photosynthesis; Protection; Triticum aestivum
• ISSN: 0269-7491; 1873-6424
• DOI: 10.1016/j.envpol.2009.03.029

The antiozonant EDU (ethylenediurea) was used to assess the impact of ambient O 3 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 O 3. EDU, thus proved its usefulness in screening suitable wheat cultivars for areas experiencing elevated concentrations of O 3. EDU successfully screened the sensitivity of tropical wheat cultivars to ambient O 3 under natural field conditions.