佟磊;王效科;郑飞翔;耿春梅;王玮;殷宝辉;隋立华;王琼;冯宗炜;

• 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
• 2:中国环境科学研究院大气化学与气溶胶研究室
• 3:中国科学院生态环境研究中心土壤环境研究室
• 4:中国环境科学研究院生态环境研究所

摘要(Abstract)：

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。

关键词(KeyWords)： 水稻(Oryza sativa L.);小麦(Triticum aestivum L.);臭氧;ethylenediurea(EDU);生物量

Abstract:

Keywords:

基金项目(Foundation): 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)

作者(Author): 佟磊;王效科;郑飞翔;耿春梅;王玮;殷宝辉;隋立华;王琼;冯宗炜;

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