Photosynthetic responses of four urban tree species exposed to elevated CO2 and for elevated O3

被引：0

作者：

Xu, Sheng ^{[1
]}

Gao, Jiang-Yan ^{[1
]}

Chen, Wei ^{[1
]}

He, Xing-Yuan ^{[1
]}

Huang, Yan-Qing ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China

来源：

BIOTECHNOLOGY, CHEMICAL AND MATERIALS ENGINEERING II, PTS 1 AND 2 | 2013年 / 641-642卷

关键词：

Global climate change; Photosynthesis; Urban tree species;

D O I：

10.4028/www.scientific.net/AMR.641-642.22

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

We compared the differences in photosynthesis of four urban tree species (Ginkgo biloba, Pinus tabulaeformis, Quercus mongolica and Pinus armandii) exposed to long-term elevated CO2 (700 ppm) and/or O-3 (80 ppb) fumigation in (open top chamber) OTC. Our results showed that elevated CO2 alleviated the damaging influence of elevated O-3 on photosynthesis in the four urban tree species. Both Q. mongolica and P. armandii showed photosynthetic acclimation after long-term treatment under elevated CO2. The combined effect of elevated CO2 and O-3 caused the changes including net photosynthetic rates (Pn), stomatal conductance (gs) and chlorophyll content that were more similar to ambient air (CK) or slightly lower than elevated CO2, indicating that elevated CO2 is able to totally or partly alleviate the harmful effects of elevated O-3 on urban tree species.

引用

页码：22 / 25

页数：4

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