Modeling of Stomatal Conductance for Estimating Ozone Uptake of Fagus crenata Under Experimentally Enhanced Free-air Ozone Exposure

Hoshika, Yasutomo; Watanabe, Makoto; Inada, Naoki; Koike, Takao

doi:10.1007/s11270-012-1158-9

Cited by 26 publications

(30 citation statements)

References 29 publications

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“…For example, a critical level can be defined as a 26 "concentration, cumulative exposure or cumulative stomatal flux of atmospheric pollutants 27 above which direct adverse effects on sensitive vegetation may occur according to present The actual damage, however, does not depend on concentrations, but on the amount of O 3 that 8 enters the plant, the capability of the plant's defense system, and the plant's sensitivity to 9 oxidative stress (Sharma et al 2012). The transport into the foliage occurs almost exclusively 10 through stomata, which also regulate CO 2 uptake while preventing desiccation.…”

mentioning

confidence: 99%

Ozone damage, detoxification and the role of isoprenoids – new impetus for integrated models

Tiwari

Grote

Churkinа

et al. 2016

Functional Plant Biol.

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14High concentrations of ozone (O 3 ) can have large impacts on the health and productivity of 15 agricultural and forest ecosystems, leading to significant economic losses. In order to estimate This review summarizes these processes, discusses their importance for O 3 damage scenarios 21 and assesses to which degree this knowledge is currently used in ecosystem models which are 22 applied for impact analyses. We find that even in highly sophisticated models, feedbacks 23 affecting regulation, detoxification capacity, and vulnerability are generally not considered. 24This implies that O 3 inflicted alterations in carbon and water balances cannot be sufficiently 25 well described to cover immediate plant responses under changing environmental conditions. 26Therefore, we suggest conceptual models that link the depicted feedbacks to available 27 process-based descriptions of stomatal conductance, photosynthesis and isoprenoid formation.

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mentioning

confidence: 99%

Ozone damage, detoxification and the role of isoprenoids – new impetus for integrated models

Tiwari

Grote

Churkinа

et al. 2016

Functional Plant Biol.

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“…Parameter estimation was carried out using a boundary line analysis (e.g., Alonso et al, 2008;Hoshika et al, 2012b (Alonso et al, 2008). We took f min as mean value less than the 5 th percentile values of conductance.…”

Section: Parameterization Of the Stomatal Conductance Modelmentioning

confidence: 99%

“…Hoshika et al (2012b) tried to parameterize O 3 -induced stomatal closure based on stomatal conductance data during 3-month exposure to O 3 in 2011. They reported that stomatal conductance was decreased with increasing cumulative O 3 exposure or uptake.…”

Section: Introductionmentioning

confidence: 99%

“…When applying the model in control conditions, there was taken to be no effect of O 3 on stomatal conductance, i.e., f O3 =1(cf. Löw et al, 2007;Hoshika et al, 2012b (Mills et al, 2010).…”

Section: Introducing a Function Of Ozone Effect On Stomatal Conductanmentioning

confidence: 99%

“…Leaf boundary layer resistance (r b ) was calculated from the wind speed, u (m s -1 ), and the cross-wind leaf dimension, L d (0.05 m for Siebold's beech, see Hoshika et al, 2012b) (Mills et al, 2010):…”

Section: Introducing a Function Of Ozone Effect On Stomatal Conductanmentioning

confidence: 99%

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Effects of ozone-induced stomatal closure on ozone uptake and its changes due to leaf age in sun and shade leaves of Siebold's beech

Hoshika

Watanabe

Inada

et al. 2015

J. Agric. Meteorol.

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An estimation of stomatal ozone uptake for the assessment of ozone risks in forest trees can be modified by ozoneinduced stomatal closure. We thus examined a seasonal course of stomatal conductance in sun and shade leaves of Siebold's beech native to northern Japan (Fagus crenata) grown under free-air ozone exposure. A performance of multiplicative stomatal conductance model was also tested, when considering ozone-induced stomatal closure into the model. Ozone caused stomatal closure in both sun and shade leaves (20% and 30-40% reduction of stomatal conductance in sun and shade leaves, respectively) during early summer. However, in autumn, stomatal closure was diminished regardless of canopy positions (approximately 7% and 6% reduction of stomatal conductance in sun and shade leaves, respectively). When observed seasonal course of stomatal closure was taken into account in stomatal conductance model, the model provided a good agreement with measurements even under conditions of elevated ozone. As a result, ozone-induced stomatal closure limited stomatal ozone uptake by 11% and 17% in sun and shade leaves of Siebold's beech, respectively. In addition, stomatal ozone uptake in shade leaves under elevated ozone was much less than that in sun leaves (35% of the value in sun leaves), indicating better avoidance of ozone stress in shade leaves. Our results suggest that a loss of ozoneinduced stomatal closure after ozone exposure in the late growing season should be considered in modeling stomatal ozone uptake for the assessment of ozone impacts on Siebold's beech.

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Cumulative ozone effect on canopy stomatal resistance and the impact on boundary layer dynamics and CO₂ assimilation at the diurnal scale: A case study for grassland in the Netherlands

2015

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Biological, chemical, and dynamical processes occurring at the surface strongly interact at diurnal scales. Therefore, this study examines the seasonal ozone impact on stomatal resistance, surface energy balance, boundary layer dynamics, and CO 2 assimilation at this (sub)diurnal scale under changing conditions. We combine a seasonal canopy resistance module with a surface-boundary layer model that solves the diurnal evolution of dynamical and chemical variables in a well-mixed, convective boundary layer. The model is constrained with observations from Cabauw (Netherlands) for the dry year 2003, representing a well-mixed boundary layer at midlatitudes over water-stressed grassland. To quantify the ozone impact, the Cumulative Uptake of Ozone is calculated over a growing season, which gives an estimate of the reduction in stomatal aperture and photosynthesis. From a sensitivity analysis with mixed-layer temperature and soil moisture content we conclude that drought is the dominant factor that determines the surface energy partitioning and limits CO 2 assimilation. Although drought causes stomatal closure, the results indicate that ozone damage, nevertheless, occurs. A second sensitivity analysis with CO 2 and ozone shows that ozone damage causes an increase in stomatal resistance of up to 40% under high ozone levels and that CO 2 -induced stomatal closure limits ozone damage. The impact on boundary layer development through the effect of CO 2 and ozone on the stomatal resistance is much smaller. At the diurnal scale soil moisture influences the surface energy partitioning, which affects the entrainment of ozone-rich air. Due to ozone damage, the CO 2 assimilation flux is reduced by about 15%.

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Modeling of Stomatal Conductance for Estimating Ozone Uptake of Fagus crenata Under Experimentally Enhanced Free-air Ozone Exposure

Cited by 26 publications

References 29 publications

Ozone damage, detoxification and the role of isoprenoids – new impetus for integrated models

Ozone damage, detoxification and the role of isoprenoids – new impetus for integrated models

Effects of ozone-induced stomatal closure on ozone uptake and its changes due to leaf age in sun and shade leaves of Siebold's beech

Cumulative ozone effect on canopy stomatal resistance and the impact on boundary layer dynamics and CO₂ assimilation at the diurnal scale: A case study for grassland in the Netherlands

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Modeling of Stomatal Conductance for Estimating Ozone Uptake of Fagus crenata Under Experimentally Enhanced Free-air Ozone Exposure

Cited by 26 publications

References 29 publications

Ozone damage, detoxification and the role of isoprenoids – new impetus for integrated models

Ozone damage, detoxification and the role of isoprenoids – new impetus for integrated models

Effects of ozone-induced stomatal closure on ozone uptake and its changes due to leaf age in sun and shade leaves of Siebold's beech

Cumulative ozone effect on canopy stomatal resistance and the impact on boundary layer dynamics and CO2 assimilation at the diurnal scale: A case study for grassland in the Netherlands

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Cumulative ozone effect on canopy stomatal resistance and the impact on boundary layer dynamics and CO₂ assimilation at the diurnal scale: A case study for grassland in the Netherlands