title: Ecophysiological and phytochemical response to ozone of wine grape cultivars of Vitis vinifera L.
abstract: Vitis vinifera sensitivity to tropospheric ozone (O3) has been evidenced in several studies. In this work, physiological and metabolic effects of O3on two wine cultivars of V. vinifera (i.e. Maturano and San Giuseppe) have been studied. Moreover, chlorogenic acid (CGA) production, in consideration of its importance in the biosynthetic pathway of polyphenols and as antioxidant, has been investigated. Maturano cultivar resulted more sensitive to O3, as evidenced by the gas exchange reduction at the early stage of treatment, and by the increase in Ci/Ca and the decoupling of net photosynthesis and the stomatal conductance at the end of the treatment. Unexpectedly, O3did not activate stilbene production. Ozone induced an early CGA decrease, significantly more consistent in cv. Maturano, and an increase after 8 days, more consistent in cv. S. Giuseppe. These results suggest that CGA could be considered a biochemical marker of O3-induced stress in V. vinifera.
authors.affiliation: a Department of Environmental Biology , Sapienza University of Rome , Rome , Italy.
authors.forename: Alessio
authors.initials: A
authors.lastname: Valletta
authors.affiliation: a Department of Environmental Biology , Sapienza University of Rome , Rome , Italy.
authors.forename: Elisabetta
authors.initials: E
authors.lastname: Salvatori
authors.affiliation: a Department of Environmental Biology , Sapienza University of Rome , Rome , Italy.
authors.forename: Anna
authors.initials: A
authors.lastname: Rita Santamaria
authors.affiliation: a Department of Environmental Biology , Sapienza University of Rome , Rome , Italy.
authors.forename: Marcello
authors.initials: M
authors.lastname: Nicoletti
authors.affiliation: a Department of Environmental Biology , Sapienza University of Rome , Rome , Italy.
authors.forename: Chiara
authors.initials: C
authors.lastname: Toniolo
authors.affiliation: b Council for Agricultural Research and Agricultural Economics Analysis (CREA) , Fruit Tree Research Centre , Rome , Italy.
authors.forename: Emilia
authors.initials: E
authors.lastname: Caboni
authors.affiliation: a Department of Environmental Biology , Sapienza University of Rome , Rome , Italy.
authors.forename: Alessandra
authors.initials: A
authors.lastname: Bernardini
authors.affiliation: a Department of Environmental Biology , Sapienza University of Rome , Rome , Italy.
authors.forename: Gabriella
authors.initials: G
authors.lastname: Pasqua
authors.affiliation: a Department of Environmental Biology , Sapienza University of Rome , Rome , Italy.
authors.forename: Fausto
authors.initials: F
authors.lastname: Manes
keywords: HPTLC; JIP test; Vitis vinifera; chlorogenic acid; stomatal conductance; tropospheric ozone