Field assessment of a snap bean ozone bioindicator system under elevated ozone and carbon dioxide in a free air system

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• 作者：Kent O. Burkey^a ; ^{Kent.Burkey@ars.usda.gov} ; Fitzgerald L. Booker^a ; ^{Fitz.Booker@ars.usda.gov} ; Elizabeth A. Ainsworth^b ; ^{Lisa.Ainsworth@ars.usda.gov} ; Randall L. Nelson^c ; ^{Randall.Nelson@ars.usda.gov}
• 关键词：Bioindicator ; Carbon dioxide ; Free air concentration enrichment (FACE) ; Ozone ; Snap bean
• 刊名：Environmental Pollution
• 出版年：2012
• 期刊代码：28_02697491
• 类别：env
• 出版时间：July, 2012
• 卷：166
• 期：Complete
• 页码：167-171
• 文件大小：154 K

摘要

Ozone-sensitive (S156) and -tolerant (R123 and R331) genotypes of snap bean (Phaseolus vulgaris L.) were tested as a plant bioindicator system for detecting O₃ effects at current and projected future levels of tropospheric O₃ and atmospheric CO₂ under field conditions. Plants were treated with ambient air, 1.4脳 ambient O₃ and 550聽ppm CO₂ separately and in combination using Free Air Concentration Enrichment technology. Under ambient O₃ concentrations pod yields were not significantly different among genotypes. Elevated O₃ reduced pod yield for S156 (63%) but did not significantly affect yields for R123 and R331. Elevated CO₂ at 550聽ppm alone did not have a significant impact on yield for any genotype. Amelioration of the O₃ effect occurred in the O₃聽+聽CO₂ treatment. Ratios of sensitive to tolerant genotype pod yields were identified as a useful measurement for assessing O₃ impacts with potential applications in diverse settings including agricultural fields.