A critical review and analysis of the use of exposure- and flux-based ozone indices for predicting vegetation effects

Musselman, Robert C.; Lefohn, Allen S.; Massman, W. J.; Heath, Robert L.

doi:10.1016/j.atmosenv.2005.10.064

Cited by 237 publications

(172 citation statements)

References 116 publications

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“…g s was reduced at higher O 3 concentration as an avoidance mechanism of plants under air pollution stress [40,41]. In this study, g s was not significantly influenced by E-O 3 at flowering stage but at seed filling stage, as indicated by significant decrease in most cultivars at seed filling stage (Fig.…”

Section: Discussionmentioning

confidence: 48%

Effects of elevated O3 exposure on seed yield, N concentration and photosynthesis of nine soybean cultivars (Glycine max (L.) Merr.) in Northeast China

et al. 2014

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a b s t r a c tNine soybean cultivars widely cultivated in Northeast China were investigated in present study to assess their O 3 sensitivities on the basis of the response of photosynthesis and seed yield to ambient and future ozone (O 3 ) concentrations, and determine whether the effects of O 3 vary with the developmental stages (flowering and seed filling stages). Relative to charcoal-filtered air (CF), elevated O 3 concentration (E-O 3 , ambient air + 40 ppb) significantly reduced soybean yields by 40%, with a range of 32-46% among cultivars. E-O 3 also induced significant decreases in pigment contents, net photosynthetic rate and chlorophyll a fluorescence at both flowering and seed filling stages in most cultivars. Except net photosynthetic rate and stomatal conductance (g s ) at seed filling stage, all variables showed no significant interaction between O 3 and cultivar, suggesting that all tested cultivars had similar sensitivities to O 3 . The responses of seed N content to E-O 3 differed among cultivars. Ambient O 3 concentration (mean of daily concentration of 19 ppb) did not induce any change relative to CF. Significant positive relationship between endogenous g s in CF and yield loss among cultivars was found only at seed filling stage. Positive correlation between effects of E-O 3 on leaf N content and effects on light saturated photosynthetic rate (A sat ) indicated that g s and leaf N content at seed filling stage contributes to yield loss and decreased photosynthesis by E-O 3 , respectively. It can be inferred that E-O 3 had a larger negative effects on seed filling stage than flowering stage of soybean.

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Section: Discussionmentioning

confidence: 48%

Effects of elevated O3 exposure on seed yield, N concentration and photosynthesis of nine soybean cultivars (Glycine max (L.) Merr.) in Northeast China

et al. 2014

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“…The present study also found that the O 3 -induced sluggish response of stomata was better explained by stomatal O 3 flux per net photosynthesis rather than by stomatal O 3 flux only, supporting the use of carbon assimilation as a surrogate for tolerance to O 3 stress including a capacity for repair and detoxification (Paoletti et al, 2008). The concept of "effective O 3 dose" reflecting plant sensitivity to unit of stomatal O 3 flux may contribute to further development of our knowledge into the mechanisms of plant response to O 3 -induced stress (Wieser et al, 2002;Musselman et al, 2006;Matyssek et al, 2008).…”

Section: Discussionmentioning

confidence: 87%

Determinants of stomatal sluggishness in ozone-exposed deciduous tree species

Hoshika

Carriero

Zhu

et al. 2014

Science of The Total Environment

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• Our knowledge of ozone (O 3 ) effects on dynamic stomatal response is still limited.• Determinants of O 3 -induced stomatal sluggishness were examined in deciduous tree species in open-top chambers.• Ozone exposure slowed closing of stomata after leaf cutting.• Stomatal sluggishness was well explained by stomatal O 3 flux per net photosynthesis.• Stomatal sluggishness depended both on ozone flux and on the capacity for detoxification or repair. a b s t r a c t a r t i c l e i n f o Our knowledge of ozone effects on dynamic stomatal response is still limited, especially in Asian tree species. We thus examined ozone effects on steady-state leaf gas exchange and stomatal dynamics in three common tree species of China (Ailanthus altissima, Fraxinus chinensis and Platanus orientalis). Seedlings were grown and were exposed to three levels of ozone in open-top chambers (42, 69, 100 nmol mol −1 daylight average, from 09:00 to 18:00). At steady-state, ozone exposure induced an uncoupling of photosynthesis and stomatal conductance, as the former decreased while the latter did not. Dynamic stomatal response was investigated by cutting the leaf petiole after a steady-state stomatal conductance was reached. Ozone exposure increased stomatal sluggishness, i.e., slowed stomatal response after leaf cutting, in the following order of sensitivity, F. chinensis N A. altissima N P. orientalis. A restriction of stomatal ozone flux reduced the ozone-induced sluggishness in P. orientalis. The ozone-induced impairment of stomatal control was better explained by stomatal ozone flux per net photosynthesis rather than by stomatal ozone flux only. This suggests that ozone injury to stomatal control depends both on the amount of ozone entering a leaf and on the capacity for biochemical detoxification or repair. Leaf mass per area and the density of stomata did not affect stomatal sluggishness.

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“…Two kinds of metrics, O 3 concentration or exposure-based indices, and flux-based indices, were applied to assess the effect of O 3 on plants and ecosystems (Musselman et al, 2006;Pleijel et al, 2007). The former are metrics related to the atmospheric environment that do not consider the status of vegetation and ecosystems, e.g., stomatal conductance, leaf area index, and growing stages.…”

Section: Introductionmentioning

confidence: 99%

Ozone concentrations, flux and potential effect on yield during wheat growth in the Northwest-Shandong Plain of China

Zhu

Sun

Zhao

et al. 2015

Journal of Environmental Sciences

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A critical review and analysis of the use of exposure- and flux-based ozone indices for predicting vegetation effects

Cited by 237 publications

References 116 publications

Effects of elevated O3 exposure on seed yield, N concentration and photosynthesis of nine soybean cultivars (Glycine max (L.) Merr.) in Northeast China

Effects of elevated O3 exposure on seed yield, N concentration and photosynthesis of nine soybean cultivars (Glycine max (L.) Merr.) in Northeast China

Determinants of stomatal sluggishness in ozone-exposed deciduous tree species

Ozone concentrations, flux and potential effect on yield during wheat growth in the Northwest-Shandong Plain of China

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