Nocturnal isoprene emission from mature trees and diurnal acceleration of isoprene oxidation rates near Quercus serrata Thunb. leaves

Growth overcompensation against O3 exposure in two Japanese oak species, Quercus mongolica var. crispula and Quercus serrata, grown under elevated CO2

“…Their shoot development pattern is categorized as a flush and succeeding-type leaf emergence (Kikuzawa, 1983); they flush shoots generally once in spring, sometimes flushing new shoots if environmental conditions are preferable, such as gap formation. According to Yamaguchi et al (2011), both the oak species are relatively O 3 tolerant among the Japanese tree species and are related to a noted capacity for isoprene emission (Loreto and Fares, 2007;Tani and Kawawata, 2008;Miyama et al, 2013). Although there have been several studies primarily investigating the effects of elevated CO 2 and/or O 3 on leaf physiological and morphological traits in oak species (e.g., Velikova et al, 2005;Paoletti et al, 2007;Watanabe et al, 2007Watanabe et al, , 2013, only a few studies have investigated the combined effects of elevated CO 2 and O 3 on the growth and carbon allocation in oak species (Quercus petraea, Broadmeadow and Jackson, 2000;cf.…”

Fragmentation and Reaction Rate Constants of Terpenoids Determined by Proton Transfer Reaction-mass Spectrometry

“…PTR-MS has been used for measuring BVOC emission from plants Okumura et al, 2008;Tani et al, 2011) and vegetation (Karl et al, 2001;Miyama et al, 2012) and as well, for measuring oxygenated VOC uptake by leaves of houseplants (Tani et al, 2007; and trees (Tani et al, 2010;Karl et al, 2010).…”

Increased phytotoxic O3 dose accelerates autumn senescence in an O3-sensitive beech forest even under the present-level O3

“…2D,F ), as reported for the seedlings of Konara oak grown under free-air O 3 fumigation 21 . Furthermore, Konara oak is known as a typical isoprene-emitting species in Japan 27 28 , which probably scavenges O 3 inside the leaf and contributes to detoxification 29 or the enhancement of membrane functions against O 3 injury 30 . Such a difference in intrinsic O 3 tolerance might be involved in the canopy-level responses to O 3 dose as well as the avoidance of O 3 uptake via stomatal closure.…”

“…The tree biomass [diameter at breast height (DBH) ≥3 cm] was estimated at 96 Mg dw ha −1 in 1999, dominated by Konara oak classified as a deciduous broadleaf tree species (66% of biomass) and Ilex pedunculosa Miq. (an evergreen broadleaf tree species; 28% of biomass) 27 . The canopy height ranged from 6 m to 20 m with an average of 12 m. The annual mean temperature was 14.7 °C (in 2000–2002), annual precipitation was 1095 mm (in 2000–2002), and annual mean solar radiation was 11.9 MJ m −2 day −1 (in 2000–2002).…”