Effect of ambient-level gas-phase peroxides on foliar injury, growth, and net photosynthesis in Japanese radish ( Raphanus sativus)

To investigate the effects of ambient-level gas-phase peroxides concurrent with O 3 on foliar injury, photosynthesis, and biomass in herbaceous plants, we exposed Japanese radish ( Raphanus sativus) to clean air, 50 ppb O 3, 100 ppb O 3, and 2–3 ppb peroxides + 50 ppb O 3 in outdoor chambers. Compar...

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Bibliographic Details
Published in:Environmental pollution (1987) 2010-05, Vol.158 (5), p.1675-1679
Main Authors: Chen, Xuan, Aoki, Masatoshi, Takami, Akinori, Chai, Fahe, Hatakeyama, Shiro
Format: Article
Language:English
Subjects:
air
Ambient-level
Animal, plant and microbial ecology
Applied ecology
Biological and medical sciences
biomass
cleaning
Damage
Ecotoxicology, biological effects of pollution
Effects of pollution and side effects of pesticides on plants and fungi
forest decline
Forests
Fundamental and applied biological sciences. Psychology
herbaceous plants
Injuries
Injury prevention
mountains
Ozone
Peroxides
Peroxides - pharmacology
Photosynthesis
Photosynthesis - drug effects
Plant damage
Plants (organisms)
Radish
Radishes
Raphanus - drug effects
Raphanus - growth & development
Raphanus - physiology
Raphanus sativus
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Summary:To investigate the effects of ambient-level gas-phase peroxides concurrent with O 3 on foliar injury, photosynthesis, and biomass in herbaceous plants, we exposed Japanese radish ( Raphanus sativus) to clean air, 50 ppb O 3, 100 ppb O 3, and 2–3 ppb peroxides + 50 ppb O 3 in outdoor chambers. Compared with exposure to 100 ppb O 3, exposure to 2–3 ppb peroxides + 50 ppb O 3 induced greater damage in foliar injury, net photosynthetic rates and biomass; the pattern of foliar injury and the cause of net photosynthetic rate reduction also differed from those occurring with O 3 exposure alone. These results indicate for the first time that sub-ppb peroxides + 50 ppb O 3 can cause more severe damage to plants than 100 ppb O 3, and that not only O 3, but also peroxides, could be contributing to the herbaceous plant damage and forest decline observed in Japan's air-polluted urban and remote mountains areas. Ambient-level gas-phase peroxides coexisted with 50 ppb O 3 may contribute to the herbaceous plants damage and forest decline observed in Japan.
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2009.12.002