Assessing the effects of ambient ozone in China on snap bean genotypes by using ethylenediurea (EDU). (October 2015)

• Record Type: Journal Article
• Authors: Yuan, Xiangyang; Calatayud, Vicent; Jiang, Lijun; Manning, William J.; Hayes, Felicity; Tian, Yuan; Feng, Zhaozhong
• Is Part Of: Environmental pollution. Volume 205(2015)
• Page Start: 199
• Page End: 208
• Publication Date: 2015-10
• Subjects: Ambient ozone -- Ethylenediurea -- Photosynthesis -- Snap bean -- Yield; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2015.05.043
• Languages: English
• ISSNs: 0269-7491

Abstract

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 8 h (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, Vc max 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. Highlights: The average O3 concentration (9–17 h) was 71 ppb from June to August in Beijing. Four genotypes of snap bean ( Phaseolus vulgaris L.) were selected. EDU effectively protected sensitive genotypes from ambient O3 damage. The protection of EDU on O3 -tolerant genotypes was limited. EDU can be regarded as a useful tool in risk assessment of ambient O3 on vegetation. Abstract : EDU protects sensitive snap bean genotypes from ambient O3