(N-[2-(2-氧-1-咪唑烷基)乙基]-N '-苯基脲(EDU)对环境臭氧胁迫下的水稻和小麦生长的影响

通过对作物定期喷施不同浓度(0、150、300和450 mg·L-1)的N-2-(2-氧-1-咪唑烷基)乙基]-N'-苯基脲(ethy lenediurea,EDU)溶液,研究EDU对环境O3胁迫下水稻“粤晶丝苗2号”(Oryza sativa L.Yuejingsi 2)和小麦“北农9549”(Triticum a...

Effect of Ethylenediurea (EDU) on the Growth of Ozone-stressed Rice (Oryza sativa L.) and Wheat (Triticum aestivum L.)

Effects of N-2-(2-oxo-1-imidazolidinyl)ethyl]-N'-phenylurea(ethylenediurea,EDU) on responses to ozone of field-grown rice(Oryza sativa L.Yuejingsi 2) and wheat(Triticum aestivum L.Beinong 9549) were investigated.The plants were treated with EDU of 0,150,300 and 450 mg·L-1 using foliar spray during the growing season.Effects of EDU treatment on crop growth varied with measuring stages and EDU concentration.For rice,300 mg·L-1 EDU treatment improved the aboveground biomass during the first two measurements.However,EDU treatment decreased the aboveground biomass,aboveground organs biomass and grain weight per plant at harvest time.Significant reduction occurred in spike biomass at 450 mg·L-1 EDU treatment.For wheat,aboveground biomass decreased under the EDU treatment during the whole experiment except for the second measurement at 150 mg·L-1 EDU.At harvest time,significant reductions were determined in aboveground and spike biomasses at 300 mg·L-1 EDU.Based on our results,it can be concluded that EDU treatment in our study had no significant protective effect on rice and wheat cultivars which may be both resistant to ambient ozone.Plant growth could be restricted by high concentration EDU.Effects of EDU on crops might depend on both its antioxidant ability and toxicity.