title: Evaluation of the effects of ozone on yield of Japanese rice (Oryza sativa L.) based on stomatal ozone uptake.
abstract: To evaluate the negative impact of ozone (O3) on Japanese crop plant yield based on cumulative stomatal O3 flux, a Japanese rice cultivar, Koshihikari, was exposed to O3 in O3-exposure chambers. Stomatal diffusive conductance to water vapour were measured during the experimental period. We parameterized and improved a stomatal diffusive conductance model by considering seasonal changes in stomatal diffusive conductance, as well as the acute effects of O3 on this variable. Our adjusted model accounted for 64% of the variation within the data set. Based on the results of linear regression analyses of the relationship between relative yield and cumulative O3 uptake, the negative impact of O3 on the yield of Koshihikari can be evaluated using cumulative O3 uptake with a threshold of 10 nmol O3 m(-2) projected leaf area s(-1) and an integration period of -300 to 100 °C days from anthesis.
authors.affiliation: Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan. Electronic address: masah_ya@cc.tuat.ac.jp.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yamaguchi
authors.forename: Daiki
authors.initials: D
authors.lastname: Hoshino
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Inada
authors.forename: Nahid
authors.initials: N
authors.lastname: Akhtar
authors.forename: Chika
authors.initials: C
authors.lastname: Sumioka
authors.forename: Kenta
authors.initials: K
authors.lastname: Takeda
authors.forename: Takeshi
authors.initials: T
authors.lastname: Izuta
mesh_terms: D000393:Air Pollutants / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity; D008954:Models, Biological; D008956:Models, Chemical; D012275:Oryza / Q000187:drug effects* / Q000502:physiology; D010126:Ozone / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity; D054046:Plant Stomata / Q000502:physiology*
chemical_list: D000393:Air Pollutants; D010126:Ozone
keywords: Oryza sativa L.; Ozone; Stomatal ozone uptake; Yield; Yield components