(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  

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

作　　者：佟磊[1] 王效科[1] 郑飞翔[1] 耿春梅[2] 王玮[2] 殷宝辉[2] 隋立华[3] 王琼[4] 冯宗炜[1] 

机构地区：[1]中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085 [2]中国环境科学研究院大气化学与气溶胶研究室,北京100012 [3]中国科学院生态环境研究中心土壤环境研究室,北京100085 [4]中国环境科学研究院生态环境研究所,北京100012

出　　处：《生态毒理学报》2011年第3期272-280,共9页Asian Journal of Ecotoxicology

基　　金：环境保护公益性行业科研专项经费(No.200809152);国家863计划项目(No.2006AA06A306);中国科学院战略性先导科技专项(Nos.XDA05050602和XDA05060102)

摘　　要：通过对作物定期喷施不同浓度(0、150、300和450mg·L-1)的N-[2-(2-氧-1-咪唑烷基)乙基]-N′-苯基脲(ethylenediurea,EDU)溶液,研究EDU对环境O3胁迫下水稻"粤晶丝苗2号"(Oryza sativa L.Yuejingsi2)和小麦"北农9549"(Triticum aestivumL.Beinong9549)生长的影响。结果表明:EDU的作用效果随观测时期和处理水平的变化而变化。水稻实验前期,300mg·L-1EDU处理的植株地上生物量明显高于对照;但实验末期,各EDU处理下的水稻地上生物量、各器官生物量和单株粒重均低于对照,其中450mg·L-1EDU处理和对照稻穗生物量的差异达到了显著水平。在小麦实验中,除实验中期150mg·L-1EDU处理外,各观测时期EDU处理下的植株地上生物量均低于对照,尤其在实验末期,300mg·L-1EDU处理下的小麦地上生物量和穗生物量的下降程度达到了显著水平。由此可知:两个作物品种对环境O3可能具有一定的耐性,因此,EDU的保护作用未能体现;高浓度EDU溶液对作物可能具有一定的毒性,O3胁迫下EDU对植物体的作用效果可能是其抗氧化性和毒性的综合体现。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.

关 键 词：水稻(Oryza SATIVA L.) 小麦(Triticum AESTIVUM L.) 臭氧 ethylenediurea(EDU) 生物量 

分 类 号：X171.5[环境科学与工程—环境科学]