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Effects of elevated ozone on photosynthetic CO2 exchange and chlorophyll a fluorescence in leaves of Quercus mongolica grown in urban area.

PubMed
Authors: Wang L, He X, Chen W

Year

2009

Paper ID

12505

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

100

Citations

13

Abstract

The aim of this study was to determine the responses of photosynthesis in leaves of Quercus mongolica to elevated O(3) exposure in an urban area. The results showed that the photosynthesis parameters were all decreased by the elevated O(3) during the whole season. Especially, light-saturated net photosynthetic rate (A) was reduced about 72% after 45 days exposure, and over the whole growing season, the differences were significant (p<0.05) compared with control. The reduction is related to both stomatal and non-stomatal factors, including a decrease (about 9%) in the maximum quantum yield of PSII photochemistry (F(v)/F(m)) detected after 90 days O(3) exposure.

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  • The aim of this study was to determine the responses of photosynthesis in leaves of Quercus mongolica to elevated O(3) exposure in an urban area.

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