title: Indirect prediction of surface ozone concentration by plant growth responses in East Asia using mini-open top chambers.
abstract: We developed small and mobile open top chambers (mini-OTC) measuring 0.6 m (W) × 0.6 m (D) × 1.2 m (H) with an air duct of 0.6 m (W) × 0.23 m (D) × 1.2 m (H). The air duct can be filled with activated charcoal to blow charcoal filtered air (CF) into the chamber, as opposed to non-filtered ambient air (NF). Ozone sensitive radish Raphanus sativus cv. Red Chime and rosette pakchoi Brassica campestris var. rosularis cv. ATU171 were exposed to NF and CF in mini-OTCs at different locations in East Asia. A total of 29 exposure experiments were conducted at nine locations, Shanghai, China, Ha Noi, Vietnam, Lampang, Phitsanulok and Pathumtani, Thailand, and Hiratsuka, Kisai, Abiko and Akagi, Japan. Although no significant relationships between the mean concentrations of ambient O(3) during the experimental period and the growth responses were observed for either species, multiple linear regression analysis suggested a good relationship between the biomass responses in each species and the O(3) concentration, temperature, and relative humidity. The cumulative daily mean O(3) (ppb/day) could be indirectly predicted by NF/CF based on the dry weight ratio of biomass, mean air temperature, and relative air humidity.
authors: Central Research Institute of Electric Power Industry (CRIEPI), 1646 Abiko, Abiko, Chiba, 270-1194, Japan. yoshihisakohno@gmail.com
authors: Yoshihisa
authors: Y
authors: Kohno
authors: Hideyuki
authors: H
authors: Matsumura
authors: Makoto
authors: M
authors: Miwa
authors: Tetsushi
authors: T
authors: Yonekura
authors: Keiji
authors: K
authors: Aihara
authors: Chanin
authors: C
authors: Umponstira
authors: Vo Thanh
authors: VT
authors: Le
authors: Nguyen Thuy
authors: NT
authors: Ngoc
authors: Phanm Hung
authors: PH
authors: Viet
authors: Ma
authors: M
authors: Wei
mesh_terms: D000393:Air Pollutants / Q000032:analysis* / Q000633:toxicity; D000397:Air Pollution / Q000706:statistics & numerical data*; D002606:Charcoal; D002681:China; D004305:Dose-Response Relationship, Drug; D007564:Japan; D010126:Ozone / Q000032:analysis* / Q000633:toxicity; D018521:Plant Physiological Phenomena / Q000187:drug effects*; D013785:Thailand; D014744:Vietnam
chemical_list: D000393:Air Pollutants; D002606:Charcoal; D010126:Ozone