Changes of net photosynthesis, antioxidant enzyme activities, and antioxidant contents of Liriodendron tulipifera under elevated ozone

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Title
Changes of net photosynthesis, antioxidant enzyme activities, and antioxidant contents of Liriodendron tulipifera under elevated ozone
Author(s)
S Z Ryang; S Y Woo; Suk Yoon Kwon; S H Kim; S H Lee; K N Kim; D K Lee
Bibliographic Citation
Photosynthetica, vol. 47, no. 1, pp. 19-25
Publication Year
2009
Abstract
Liriodendron tulipifera was exposed to gradually elevated ozone concentrations of 100-300 μg kg-1 in the naturally irradiated environment chamber. During 15 d of exposure to O3, net photosynthetic rate (P N) decreased and there was large difference between the control (C) and treatment with ozone (OT), while there was no significant difference in water use efficiency. Total chlorophyll content as well as the value of fluorescence parameter Fv/Fm decreased, while antioxidant enzyme activities related to ascorbate-glutathione cycle increased after 15 d of OT. Unchanged contents of ascorbate and glutathione indirectly suggest that the species hastened the antioxidant's oxidization/reduction cycle using enzymes instead of expanding their pool against oxidative stress.
Keyword
ascorbatecatalasechlorophyll content and fluorescenceglutathione reductaseirradianceO₃peroxidasesuperoxide dismutasewater use efficiency
ISSN
0300-3604
Publisher
Acad Sciences Czech Republic, Inst Experimental Botany
DOI
http://dx.doi.org/10.1007/s11099-009-0005-8
Type
Article
Appears in Collections:
Division of Biomaterials Research > 1. Journal Articles
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