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Göteborgs universitets publikationer

Responses of native broadleaved woody species to elevated ozone in subtropical China

Författare och institution:
W. W. Zhang (-); Zhaozhong Feng (Institutionen för biologi och miljövetenskap); X. K. Wang (-); J. F. Niu (-)
Publicerad i:
Environmental Pollution, 163 s. 149-157
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
To assess ozone sensitivity of subtropical broadleaved tree species and explore possible underlying mechanisms, six evergreen and two deciduous native species were exposed to either charcoal-filtered air or elevated O-3 (E-O-3, similar to 150 ppb) for one growing season. Initial visible symptoms in deciduous species appeared much earlier than those in evergreen species. The species which first showed visible symptoms also had the largest reductions in biomass. E-O-3 induced significant decreases in photosynthesis rate, chlorophyll content and antioxidant capacity but a significant increase in malondialdehyde content in two deciduous species and two evergreen species (Cinnamomum camphora and Cyclobalanopsis glauca). Except C. glauca, however, E-O-3 had no significant effects on stomata! conductance (g,), total phenols and ascorbate contents. Difference in O-3 sensitivity among all species was strongly attributed to specific leaf mass rather than g(s). It suggests that some subtropical tree species will be threatened by rising O-3 concentrations in the near future. (C) 2011 Elsevier Ltd. All rights reserved.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Biologiska vetenskaper
ozone, subtropical species, sensitivity, visible symptom, gas exchange, antioxidant defense, beech fagus-sylvatica, european forest trees, ground-level ozone, tropospheric ozone, gas-exchange, young trees, antioxidant activity, growth-responses, gene-expression, climate-change
Postens nummer:
Posten skapad:
2013-01-09 10:05
Posten ändrad:
2013-01-09 13:26

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