Use of ethylenediurea (EDU) to ameliorate ozone effects on purple coneflower (Echinacea purpurea)

详细信息	查看全文 | 推荐本文 |

• 作者：Zoltan Szantoi ; Arthur H. Chappelka ; Russell B. Muntifering ; Greg L. Somers
• 关键词：Ozone ; Ethylenediurea ; Natural vegetation ; Echinacea purpurea ; Nutritive quality
• 刊名：Environmental Pollution
• 出版年：2007
• 期刊代码：28_02697491
• 类别：env
• 出版时间：November 2007
• 卷：150
• 期：2
• 页码：200-208
• 文件大小：215 K

摘要

Purple coneflower plants (Echinacea purpurea) were placed into open-top chambers (OTCs) for 6 and 12 weeks in 2003 and 2004, respectively, and exposed to charcoal-filtered air (CF) or twice-ambient (2×) ozone (O₃) in 2003, and to CF, 2× or non-filtered (NF), ambient air in 2004. Plants were treated with ethylenediurea (EDU) weekly as a foliar spray. Foliar symptoms were observed in >95%of the plants in 2×-treated OTCs in both years. Above-ground biomass was not affected by 2× treatments in 2003, but root and total-plant biomass decreased in 2004. As a result of higher concentrations of select cell wall constituents (%ADF, NDF and lignin) nutritive quality was lower for plants exposed to 2×-O₃ in 2003 and 2004 (26%and 17%, respectively). Significant EDU × O₃ interactions for concentrations of cell wall constituents in 2003 indicated that EDU ameliorated O₃ effects on nutritive quality. Interactions observed in 2004 were inconsistent.