Laboratory of Air Pollution and Global Climatic Change, Ecology Research Circle, Department of Botany, Banaras Hindu University, Varanasi 221005, India.
Environ Pollut. 2009 Aug-Sep;157(8-9):2359-67. doi: 10.1016/j.envpol.2009.03.029. Epub 2009 Apr 21.
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).
抗臭氧剂 EDU（乙二醛二脲）被用于评估田间条件下大气 O₃对五种热带小麦（Triticum aestivum L.）品种的影响。EDU 溶液（0 ppm 和 400 ppm）在发芽后 10 天（DAG）作为土壤淋溶（每株 100 毫升）应用，间隔 12 天一次。在 HUW468、HUW510 和 HUW234 品种中，EDU 处理的植物表现出气孔导度、光合速率、可变荧光、总叶绿素、抗坏血酸、脯氨酸和蛋白质含量以及保护酶（POX、SOD 和 APX）活性的显著增加，而脂质过氧化则呈现相反的趋势。EDU 处理在品种 HUW468 和 HUW510 中通过维持更高水平的抗氧化剂、代谢物和酶，显著恢复了籽粒产量。Sonalika 和 PBW343 在 EDU 处理下表现出最小的测量参数响应，表明它们对 O₃的抵抗力更强。因此，EDU 证明了其在筛选经历臭氧浓度升高地区的适宜小麦品种方面的有用性。
