Effects of Elevated Ozone on Photosynthetic CO2 Exchange and Chlorophyll a Fluorescence in Leaves of Quercus mongolica Grown in Urban Area

Wang, Lanlan; He, Xingyuan; Chen, Wei

doi:10.1007/s00128-008-9606-3

Cited by 10 publications

(7 citation statements)

References 14 publications

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“…The exposure to O 3 induced a decrease in F v /F m more in Peg than in Ast. Similar to our results, F v /F m was found to decline under O 3 exposure in soybean (Chen et al 2009), in Quercus mongolica (Wang et al 2009b) and in wheat at grain filling (Wang et al 2009a). However, after reducing the amount of O 3 added after 22nd May, F v /F m recovered to nearly initial values especially in Peg.…”

Section: Discussionsupporting

confidence: 90%

Effects of Ozone on Leaf Senescence, Photochemical Efficiency and Grain Yield in Two Winter Wheat Cultivars

Burkart¹,

Bender²,

Tarkotta³

et al. 2012

J Agronomy Crop Science

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The adverse effects of tropospheric ozone (O 3 ) on crop photosynthesis, growth and yield have been documented in numerous studies over the last decades, but little information from field experimentation exists on how modern European winter wheat cultivars respond to O 3 . Two winter wheat cultivars (Astron and Pegassos) differing in development characteristics were exposed to non-filtered ambient air or non-filtered air plus 30 ppb and non-filtered air plus 60 ppb O 3 (8 h day À1 ) in open-top field chambers. At several dates during growth, green leaf area was determined by destructive harvests. Leaf gas exchange, pigment content and xanthophyll cycle activity, and photochemical efficiency by chlorophyll a fluorescence were measured. O 3 exposure induced accelerated senescence with no difference between cultivars. Photosynthesis declined especially in Pegassos; however, stomatal conductance was hardly affected by O 3 . Pigment contents were reduced by O 3 exposure, and de-epoxidation index increased. Photochemical efficiency (F v /F m ) declined, whereas actual quantum yield (Φ PSII ) did not respond to O 3 . O 3 exposure reduced grain yield in both cultivars. However, yield of Pegassos was more affected by O 3 exposure than yield of Astron, suggesting a higher O 3 sensitivity of Pegassos. The data presented in this manuscript indicate a need to test whether high-yield varieties such as Pegassos are particularly sensitive to O 3 exposure.

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Section: Discussionsupporting

confidence: 90%

Effects of Ozone on Leaf Senescence, Photochemical Efficiency and Grain Yield in Two Winter Wheat Cultivars

Burkart¹,

Bender²,

Tarkotta³

et al. 2012

J Agronomy Crop Science

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“…Quercus mongolica is an economically and ecologically important temperate deciduous tree species, and the secondary forest dominated by Q. mongolica accounts for large part of forest area in northeastern China. Previous study has demonstrated that elevated O 3 significantly decreased the photosynthetic rate (Pn) in Q. mongolica (Wang et al 2009). In addition, it has been illustrated that ambient level of O 3 in Japan was not high enough to suppress the growth of Q. mongolica (Matsumura 2001), but a mathematical model estimated that its annual net production was negatively affected by ambient O 3 in Korea (Wook and Kim 1997).…”

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confidence: 99%

Elevated CO2 ameliorated oxidative stress induced by elevated O3 in Quercus mongolica

Chen

Zhang

et al. 2009

Acta Physiol Plant

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Using open top chambers, the effects of elevated O 3 (80 nmol mol -1 ) and elevated CO 2 (700 lmol mol -1 ), alone and in combination, were studied on young trees of Quercus mongolica. The results showed that elevated O 3 increased malondialdehyde content and decreased photosynthetic rate after 45 days of exposure, and prolonged exposure (105 days) induced significant increase in electrolyte leakage and reduction of chlorophyll content. All these changes were alleviated by elevated CO 2 , indicating that oxidative stress on cell membrane and photosynthesis was ameliorated. After 45 days of exposure, elevated O 3 stimulated activities of superoxide dismutase (SOD, EC 1.15.

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“…The environmental conditions were similar to gas exchange measurement. The same method of Chlorophyll a fluorescence measurement has been reported (Wang et al, 2009).…”

Section: Chlorophyll a Fluorescence Measurementsmentioning

confidence: 96%

“…One leaf per plant and three plants per OTC (three OTCS per treatment, n = 9) were measured by a portable photosynthesis system (LI-6400, Li-Cor Inc., Lincoln NE, USA) to attain a mean value every 15 days. The same method of gas exchange measurements has been reported (Wang et al, 2009).…”

Section: Gas Exchange Measurementsmentioning

confidence: 97%

Co-Ordination of Photosynthesis and Stomatal Responses of Mongolian Oak (Quercus Mongolica Fisch. Ex Ledeb.) to Elevated O3 and/or Co2 Levels

Wang¹

2019

Appl. Ecol. Env. Res.

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Four-year-old trees grown in open-top chambers (OTCs) were exposed to elevated O3 (80 nmol/mol, EO) or/and elevated CO2 (700 μmol/mol, EC) levels. The object is to study the responses of photosynthesis and stomata in leaves of Mongolian oak (Quercus mongolica) to EO and/or EC for two successive growing seasons in an urban area. The experiment was conducted in the arboretum located at the center of Shenyang city. The results show that: (1) EO decreased Pn (Light-saturated net photosynthesis rate), gs (stomatal conductance) and Tr (transpiration rate). The stomata closure maybe associated with the direct effect of EO on guard cells. The decreases of F0, Fm and Fv/Fm indicated that EO limits the capability of the plant to use photon energy and thus alters photosynthesis. (2) EC increased Pn and Ci (intercellular CO2 concentration) of leaves, but decreased gs and Tr slightly. Stomatal density decreased significantly at the end of the second season. Perhaps, EC was detected by mature leaves in the first season which signaled to the developing leaves in the next season, the stomatal developments of which altered accordingly. (3) Under EC+EO, EC relieved most of the O3-induced adverse effects to Pn. The decreases of gs and Tr were mainly caused by EO. There was no significant difference of Fv/Fm detected compared to the control, EC can largely relieve the adverse effects of EO on the PSII reaction center. Changes of stomatal parameters were just like the changes under EC. Perhaps the morphological changes of the stomata were mainly caused by EC.

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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

Cited by 10 publications

References 14 publications

Effects of Ozone on Leaf Senescence, Photochemical Efficiency and Grain Yield in Two Winter Wheat Cultivars

Effects of Ozone on Leaf Senescence, Photochemical Efficiency and Grain Yield in Two Winter Wheat Cultivars

Elevated CO2 ameliorated oxidative stress induced by elevated O3 in Quercus mongolica

Co-Ordination of Photosynthesis and Stomatal Responses of Mongolian Oak (Quercus Mongolica Fisch. Ex Ledeb.) to Elevated O3 and/or Co2 Levels

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