title: Effects of ozone on growth, yield and leaf gas exchange rates of four Bangladeshi cultivars of rice (Oryza sativa L.).
abstract: To assess the effects of tropospheric O3 on rice cultivated in Bangladesh, four Bangladeshi cultivars (BR11, BR14, BR28 and BR29) of rice (Oryza sativa L.) were exposed daily to charcoal-filtered air or O3 at 60 and 100 nl l(-1) (10:00-17:00) from 1 July to 28 November 2008. The whole-plant dry mass and grain yield per plant of the four cultivars were significantly reduced by the exposure to O3. The exposure to O3 significantly reduced net photosynthetic rate of the 12th and flag leaves of the four cultivars. The sensitivity to O3 of growth, yield and leaf gas exchange rates was not significantly different among the four cultivars. The present study suggests that the sensitivity to O3 of yield of the four Bangladeshi rice cultivars is greater than that of American rice cultivars and is similar to that of Japanese rice cultivars and that O3 may detrimentally affect rice production in Bangladesh.
authors.affiliation: United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan.
authors.forename: Nahid
authors.initials: N
authors.lastname: Akhtar
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yamaguchi
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Inada
authors.forename: Daiki
authors.initials: D
authors.lastname: Hoshino
authors.forename: Taisuke
authors.initials: T
authors.lastname: Kondo
authors.forename: Motohiro
authors.initials: M
authors.lastname: Fukami
authors.forename: Ryo
authors.initials: R
authors.lastname: Funada
authors.forename: Takeshi
authors.initials: T
authors.lastname: Izuta
mesh_terms: D000393:Air Pollutants / Q000378:metabolism / Q000633:toxicity*; D001459:Bangladesh; D012275:Oryza / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D010126:Ozone / Q000378:metabolism / Q000633:toxicity*; D018515:Plant Leaves / Q000187:drug effects* / Q000378:metabolism; D018526:Plant Transpiration / Q000187:drug effects*
chemical_list: D000393:Air Pollutants; D010126:Ozone