Differential sensitivity of four urban tree species to elevated O3

Xu, Sheng; He, Xingyuan; Chen, Wei; Huang, Yanqing; Zhao, Y.; Li, Bo

doi:10.1016/j.ufug.2015.10.015

Cited by 23 publications

(16 citation statements)

References 41 publications

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“…4). Over the past decade there has been a lot of research on plant sensitivity to ozone, including studies comparing the sensitivity of evergreen and deciduous species (Calatayud et al, 2011(Calatayud et al, , 2010, the sensitivity of urban tree species (Li et al, 2016;Xu et al, 2015) and the sensitivity of different poplar genotypes (Di Baccio et al, 2014;Dumont et al, 2014). Li et al (2016) found that ozone sensitivity was strongly related to LMA, and leaves with lower LMA are more sensitive to ozone (Li et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Ozone exposure- and flux-based response relationships with photosynthesis, leaf morphology and biomass in two poplar clones

Shang

Feng

Пин

et al. 2017

Science of The Total Environment

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Section: Discussionmentioning

confidence: 99%

Ozone exposure- and flux-based response relationships with photosynthesis, leaf morphology and biomass in two poplar clones

Shang

Feng

Пин

et al. 2017

Science of The Total Environment

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“…Ozone (O 3 ), is one of the most important air pollutants, has increased considerably since pre-industrial times, fast consumption of the fossil fuels is mainly responsible for significant increase in the atmospheric O 3 concentration, and is predicated to exceed 80 ppb [1]. Tropospheric ozone is formed by photochemical reactions between oxides of nitrogen, CO, methane and other volatile organic compound in the presence of sunlight.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ozone Stress on Secondary Metabolism and Antioxidant Capacity in Soybean Roots

Zhao¹,

Wang²,

Tian³

et al. 2016

Proceedings of the 2016 International Conference on Biomedical and Biological Engineering

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In this paper, to examine the effects of elevated ozone on secondary metabolism and antioxidant capacity in soybean roots, as well as reactive oxygen species and antioxidant enzymes activity. Soybean grown in open top chambers (OTCs) were exposed to ambient air ([O 3 ]=40nmol•mol-1) and elevated ozone ([O 3 ]=110±10nmol•mol-1). The results revealed that with ozone concentration rising, compared with control, the O 3 stress induced the total flavonoids content in soybean root of all treatments showed a significant rising trend (P<0.05), and the total polyphenols content showed a rising trend but not significant. The PAL and PPO activity of soybean root was always lower than that of CK, the LOX activity of soybean root was always higher than that of CK, but the PALˎLOX and PPO activity of soybean root expressed an increased trend with the increase of soybean growth period. However, variation of antioxidant enzymes activity in soybean roots was very different from each other. Superoxide dismutase (SOD) activity was lower than the CK treatment at flowering and podding stages under elevated ozone stress, it presents a volatility changes. During the whole growth stage, elevated ozone stress induced a decrease on activity of catalase (CAT) except for flowering stage, it had a significant increase (p<0.05), the ozone treatment was higher than the CK treatment in general except flowering stage. Activity of peroxidase (POD) was increased under elevated ozone. It had a higher representation (p<0.05) than the CK treatment at every stage. It can be concluded that the ozone stress has significant effects on soybean roots, and effects on soybean roots' normal growth.

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“…According to our recent observations, the highest O3 concentration at ground level is frequently over 40 ppb or even up to more than 80 ppb during the summer in the urban area of Shenyang city (Xu et al, 2015). For many years, we assessed the effects of elevated O3 concentration on the eco-physiology of urban trees including G. biloba (He et al, 2009;Lu et al, 2009;Li et al, 2011;Xu et al, 2015). Here we aim to complement such previous studies with a manipulative experiment testing O3 effects on G. biloba leaf litter decomposition and chemical features.…”

Section: Introductionmentioning

confidence: 89%

“…This experiment was carried out in open-top cambers (OTCs). Chambers are 4 m in diameter and 3 m in height, with a 45 o sloping frustum and 4-m distance between neighbouring OTCs (Li et al, 2011;Xu et al, 2015). This experiment included control in ambient air (AA, about 40 ppb) and elevated O3 concentration (EO, 120 ppb).…”

Section: Study Site and Experimental Treatmentsmentioning

confidence: 99%

“…Ginkgo biloba is commonly planted in the cities of northern China and it is one of the main tree species in the urban forest of Shenyang, Liaoning Province, China. According to our recent observations, the highest O3 concentration at ground level is frequently over 40 ppb or even up to more than 80 ppb during the summer in the urban area of Shenyang city (Xu et al, 2015). For many years, we assessed the effects of elevated O3 concentration on the eco-physiology of urban trees including G. biloba (He et al, 2009;Lu et al, 2009;Li et al, 2011;Xu et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Peer Review #1 of "Changes in nutrients and decay rate of Ginkgo biloba leaf litter exposed to elevated O3 concentration in urban area (v0.1)"

2018

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Ground-level ozone (O 3) pollution has been widely concerned in the world, particularly in the cities of Asia, including China. Elevated O 3 concentrations have potentially influenced growth and nutrient cycling of trees in urban forest. The decomposition characteristics of urban tree litters under O 3 exposure are still poorly known. Ginkgo biloba is commonly planted in the cities of northern China and is one of the main tree species in the urban forest of Shenyang, where concentrations of ground-level O 3 are very high in summer. Here, we hypothesized that O 3 exposure at high concentrations would alter the decomposition rate of urban tree litter. In open-top cambers (OTCs), 5-year-old G. biloba saplings were planted to investigate the impact of elevated O 3 concentration (120 ppb) on changes in nutrient contents and decomposition rate of leaf litters. The results showed that elevated O 3 concentration significantly increased K content (6.31 ± 0.29 vs 17.93 ± 0.40, P＜0.01) in leaves of G. biloba, significantly decreased the contents of total phenols (2.82 ± 0.93 vs 1.60 ± 0.44, P＜0.05) and soluble sugars (86.51 ± 19.57 vs 53.76 ± 2.40, P＜0.05), but did not significantly alter the contents of C, N, P, lignin and condensed tannins, compared with that in ambient air. Furthermore, percent mass remaining in litterbags after 150 days under ambient air and elevated O 3 concentration was 56.0% and 52.8%, respectively. No significant difference between treatments was observed in mass remaining at any sampling date during decomposition. The losses of the nutrients in leaf litters of G. biloba showed significant seasonal differences regardless of O 3 treatment. However, we found that elevated O 3 concentration slowed down the leaf litter decomposition only at the early decomposition stage, but slightly accelerated the litter decomposition at the late stage (after 120 days). This study provides our understanding of the ecological processes regulating biogeochemical cycles from deciduous tree species in high-O 3 urban area.

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Differential sensitivity of four urban tree species to elevated O3

Cited by 23 publications

References 41 publications

Ozone exposure- and flux-based response relationships with photosynthesis, leaf morphology and biomass in two poplar clones

Ozone exposure- and flux-based response relationships with photosynthesis, leaf morphology and biomass in two poplar clones

Effects of Ozone Stress on Secondary Metabolism and Antioxidant Capacity in Soybean Roots

Peer Review #1 of "Changes in nutrients and decay rate of Ginkgo biloba leaf litter exposed to elevated O3 concentration in urban area (v0.1)"

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