title: Ozone-induced stomatal sluggishness develops progressively in Siebold's beech (Fagus crenata).
abstract: We investigated the effects of ozone and leaf senescence on steady-state stomatal conductance and stomatal response to light variation. Measurements were carried out in a free-air ozone exposure experiment on a representative deciduous broadleaved tree species in Japan (Fagus crenata). Both steady-state and dynamic stomatal response to light variation varied intrinsically with season due to leaf senescence. Ozone induced the decrease in steady-state leaf gas exchange and the sluggish stomatal closure progressively. These findings suggest that ozone reduces the ability of plants to adapt to a fluctuating light environment under natural conditions, and therefore impairs plant growth and ability to control water loss.
authors.affiliation: Silvicluture and Forest Ecological Studies, Hokkaido University, Sapporo 060-8689, Japan.
authors.forename: Yasutomo
authors.initials: Y
authors.lastname: Hoshika
authors.forename: Makoto
authors.initials: M
authors.lastname: Watanabe
authors.forename: Naoki
authors.initials: N
authors.lastname: Inada
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Koike
mesh_terms: D000393:Air Pollutants / Q000633:toxicity*; D029964:Fagus / Q000187:drug effects* / Q000502:physiology; D007564:Japan; D010126:Ozone / Q000633:toxicity*; D018515:Plant Leaves / Q000187:drug effects / Q000502:physiology; D054046:Plant Stomata / Q000187:drug effects* / Q000502:physiology
chemical_list: D000393:Air Pollutants; D010126:Ozone