title: Assessing the effects of ambient ozone in China on snap bean genotypes by using ethylenediurea (EDU).
abstract: Four genotypes of snap bean (Phaseolus vulgaris L.) were selected to study the effects of ambient ozone concentration at a cropland area around Beijing by using 450 ppm of ethylenediurea (EDU) as a chemical protectant. During the growing season, the 8h (9:00-17:00) average ozone concentration was very high, approximately 71.3 ppb, and AOT40 was 29.0 ppm.h. All genotypes showed foliar injury, but ozone-sensitive genotypes exhibited much more injury than ozone-tolerant ones. Compared with control, EDU significantly alleviated foliar injury, increased photosynthesis rate and chlorophyll a fluorescence, Vcmax and Jmax, and seed and pod weights in ozone-sensitive genotypes but not in ozone-tolerant genotypes. EDU did not significantly affect antioxidant contents in any of the genotypes. Therefore, EDU effectively protected sensitive genotypes from ambient ozone damage, while protection on ozone-tolerant genotypes was limited. EDU can be regarded as a useful tool in risk assessment of ambient ozone on food security.
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing 100085, China; Department of Food, Beijing Technology and Business University, Fucheng Road 11, Haidian District, Beijing 100048, China.
authors.forename: Xiangyang
authors.initials: X
authors.lastname: Yuan
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing 100085, China; Fundación CEAM, c/Charles R. Darwin 14, Parque Tecnológico, 46980 Paterna, Valencia, Spain.
authors.forename: Vicent
authors.initials: V
authors.lastname: Calatayud
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing 100085, China.
authors.forename: Lijun
authors.initials: L
authors.lastname: Jiang
authors.affiliation: Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003-9320, USA.
authors.forename: William J
authors.initials: WJ
authors.lastname: Manning
authors.affiliation: Centre for Ecology and Hydrology, Environment Centre Wales, Deiniol Road, Bangor, Gwynedd LL57 2UW, UK.
authors.forename: Felicity
authors.initials: F
authors.lastname: Hayes
authors.affiliation: Department of Food, Beijing Technology and Business University, Fucheng Road 11, Haidian District, Beijing 100048, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Tian
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing 100085, China. Electronic address: fzz@rcees.ac.cn.
authors.forename: Zhaozhong
authors.initials: Z
authors.lastname: Feng
mesh_terms: D000393:Air Pollutants / Q000494:pharmacology; D000975:Antioxidants / Q000378:metabolism; D000068476:Beijing; D002734:Chlorophyll / Q000378:metabolism; D000077194:Chlorophyll A; D004784:Environmental Monitoring; D005838:Genotype; D010126:Ozone / Q000494:pharmacology*; D027805:Phaseolus / Q000187:drug effects* / Q000235:genetics / Q000378:metabolism; D010671:Phenylurea Compounds / Q000494:pharmacology*; D010788:Photosynthesis / Q000187:drug effects; D012621:Seasons
chemical_list: D000393:Air Pollutants; D000975:Antioxidants; D010671:Phenylurea Compounds; D002734:Chlorophyll; D010126:Ozone; D000077194:Chlorophyll A
keywords: Ambient ozone; Ethylenediurea; Photosynthesis; Snap bean; Yield