title: Effectiveness of different EDU concentrations in ameliorating ozone stress in carrot plants.
abstract: Ethylenediurea (EDU) is suggested for use to evaluate plant response under ambient ozone (O(3)) concentrations. Four EDU treatments, viz. 0 (non-EDU), 150, 300 and 450 mg L(-1), applied as soil drench at 10 days interval to carrot (Daucus carota L. var. Pusa Kesar), grown at a tropical suburban site of Varanasi experiencing mean O(3) concentration of 36.1 ppb during the experimental period. EDU treated plants showed significantly higher antioxidative defense, assimilation capability and reduced membrane lipid peroxidation, which led to better growth and significant yield increments compared to non-EDU treated ones. The magnitude of positive responses was highest at 150 mg L(-1) EDU treatment at 60 DAG, representing the metabolically most active phase of root filling in carrot. This study suggests that the lowest EDU concentration was sufficient to provide protection against negative effects of O(3).
authors.affiliation: Department of Botany, Banaras Hindu University, Varanasi, India.
authors.forename: Supriya
authors.initials: S
authors.lastname: Tiwari
authors.forename: Madhoolika
authors.initials: M
authors.lastname: Agrawal
mesh_terms: D000393:Air Pollutants / Q000633:toxicity*; D018552:Daucus carota / Q000187:drug effects* / Q000502:physiology; D004305:Dose-Response Relationship, Drug; D004784:Environmental Monitoring; D015227:Lipid Peroxidation / Q000187:drug effects; D009585:Nitrogen Dioxide / Q000032:analysis; D018384:Oxidative Stress / Q000187:drug effects*; D010126:Ozone / Q000633:toxicity*; D010671:Phenylurea Compounds / Q000494:pharmacology*; D010788:Photosynthesis / Q000187:drug effects; D013458:Sulfur Dioxide / Q000032:analysis
chemical_list: D000393:Air Pollutants; D010671:Phenylurea Compounds; D013458:Sulfur Dioxide; C032766:ethylene diurea; D010126:Ozone; D009585:Nitrogen Dioxide