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Assessing the effects of ambient ozone in China on snap bean genotypes by using ethylenediurea (EDU).
- Source :
- Environmental Pollution; Oct2015, Vol. 205, p199-208, 10p
- Publication Year :
- 2015
-
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 J max , 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. [ABSTRACT FROM AUTHOR]
- Subjects :
- KIDNEY bean
OZONE & the environment
GENOTYPES
PHOTOSYNTHESIS
ETHYLENEDIUREA
Subjects
Details
- Language :
- English
- ISSN :
- 02697491
- Volume :
- 205
- Database :
- Supplemental Index
- Journal :
- Environmental Pollution
- Publication Type :
- Academic Journal
- Accession number :
- 108942879
- Full Text :
- https://doi.org/10.1016/j.envpol.2015.05.043