Effects of different ozone exposure regimes on photosynthesis, assimilates and thousand grain weight in spring wheat

Meyer, Ute; Köllner, Barbara; Willenbrink, Johannes; Krause, G. H. M.

doi:10.1016/s0167-8809(99)00111-5

Cited by 41 publications

(30 citation statements)

References 32 publications

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“…Once O 3 entered into mesophyll, it severely damaged the structure and function of photosynthetic organ (Lütz et al 2000), and was accompanied by a series of physiological and biochemical characters altering in plant, such as an increase of membrane permeability, protein decomposition, and lipid peroxidation (Jin et al 2000, Lütz et al 2000, Płażek et al 2000, Calatayud et al 2004). Therefore, a significant decrease in P N was found in additional O 3 treatment (CF+O 3 ), which was also observed by Meyer et al (2000) under two different O 3 concentration peak regimes.…”

Section: Discussionsupporting

confidence: 64%

“…Most studies indicated that O 3 significantly induced a decrease in P N and crop yields (Bosac et al 1998, Heagle et al 1998, Meyer et al 2000, Feng et al 2003, 2006, Calatayud et al 2004). In our study, O 3 affected the photosynthetic capacity in wheat plants, including changes in diurnal pattern of gas exchanges and P N -PPFD response parameters, and thus a decrease in yield components was observed.…”

Section: Discussionmentioning

confidence: 99%

“…However, most results mentioned above were mostly based on constant concentration fumigation regimes. Meyer et al (2000) indicated that ozone treatments with comparatively high peak concentration induce more pronounced damage than ozone patterns with moderate peaks under equal dose conditions. Ozone has a typical diurnal profile with peak concentration during the afternoon and low concentrations at night when other pollutants are present.…”

Section: Introductionmentioning

confidence: 99%

“…As predicted by IPCC (2002), ambient O 3 concentration at summer would be over 70 mm 3 m -3 in Northern Hemisphere at the end of the century if current levels of anthropogenic activity were maintained. O 3 at ambient concentrations in the United States, Europe, and Asia causes a range of effects including reduced photosynthetic activities, altered carbon metabolism, and yield reductions (Soja and Soja 1995, Bosac et al 1998, Heagle et al 1998, Meyer et al 2000, Dizengremel 2001, Fuhrer and Booker 2003, Calatayud et al 2004, 2006a,b, Skotnica et al 2005, but the detrimental effects of O 3 are dependent on the genetic background, development phase of the plants, O 3 doses, and climate (Heath 1994). In China, model simulations and open top chamber (OTC) experiment indicated that O 3 pollution is likely to worsen in the coming decades and ground-level O 3 is sufficiently high to depress yields of winter wheat and rice (Chameides et al 1999, Feng et al 2003.…”

Section: Introductionmentioning

confidence: 99%

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Response of gas exchange and yield components of field-grown Triticum aestivum L. to elevated ozone in China

et al. 2007

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To assess photosynthesis and yield components' response of field-grown wheat to increasing ozone (O 3 ) concentration (based on diurnal pattern of ambient O 3 ) in China, winter wheat (Triticum aestivum L.) cv. Jia 403 was planted in open top chambers and exposed to three different O 3 concentrations: O 3 -free air (CF), ambient air (NF), and O 3 -free air with additional O 3 (CF+O 3 ). Diurnal changes of gas exchange and net photosynthetic rate (P N ) in response to photosynthetic photon flux density (PPFD) of flag leaves were measured at the filling grain stage, and yield components were investigated at harvest. High O 3 concentration altered diurnal course of gas exchange [P N , stomatal conductance (g s ), and intercellular CO 2 concentration (C i )] and decreased significantly their values except for C i . Apparent quantum yield (AQY), compensation irradiance (CI), and saturation irradiance (SI) were significantly decreased, suggesting photosynthetic capacity was also altered, characterized as reduced photon-saturated photosynthetic rate (P Nmax ). The limit of photosynthetic activity was probably dominated by non-stomatal factors in combination with stomatal closure. The significant reduction in yield was observed in CF+O 3 treatment as a result of a marked decrease in the ear length and the number of grains per ear, and a significant increase in the number of infertile florets per ear. Even though similar responses were also observed in plants exposed to ambient O 3 concentration, no statistical difference was observed at current ambient O 3 concentration in China.Additional key words: apparent quantum yield; diurnal pattern of O 3 ; net photosynthetic rate; irradiance; stomatal conductance; yield components.

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Section: Discussionsupporting

confidence: 64%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Response of gas exchange and yield components of field-grown Triticum aestivum L. to elevated ozone in China

et al. 2007

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“…O3 also increases leaf malonyldialdehyde (MDA) and reactive oxygen species contents, membrane permeability, and membrane lipid peroxidation (Tausz et al 2007). It reduces chlorophyll content, changes chloroplast structure, reduces the number and activity of photosynthetic enzymes and the photosynthetic rate, and changes the distribution of photosynthetic products (Meyer et al 2000). …”

mentioning

confidence: 99%

Adaptability of Indocalamus decorus to climate change based on physiological and biochemical responses to elevated carbon dioxide and ozone

Guo¹,

Zhuang²,

Li³

et al. 2016

iForest

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(1) Carbon dioxide (CO2) and ozone (O3) are important greenhouse gases that contribute to global climate change. The effects of elevated CO2 and/or O3 on plants remain unclear. Plant responses to mixtures of the two gases at high concentrations are likely to be complex. Previous studies have shown that the ability to tolerate elevated levels of the two gases varies among plant species; physiological adaptability in the face of changing atmospheric composition also differs among taxa. However, the effects of mixtures of the two greenhouse gases on the growth and physiology of bamboo are largely unexplored, even though bamboos are important vegetation elements throughout tropical and subtropical regions of the planet. In this study, we used open-topped chambers (OTC) to double the concentrations of atmospheric CO2 and O3, and examined changes in membrane lipid peroxidation, photosynthetic physiology, and antioxidase activities in Indocalamus decorus leaves. After 103 days of treatment, elevated O3 depressed net photosynthetic rate (Pn) without changing stomatal function, but caused no significant oxidative damage in the leaves. High levels of antioxidase activities were maintained in the leaves, indicating that this species had a strong tolerance to elevated O3. Decreases in reactive oxygen content and antioxidase activity in the leaves highlighted the significant positive effects of elevated CO2 on photosynthesis in I. decorus. When a mixture of both gases was supplied at high concentrations, we detected no oxidative damage, although photosynthetic capacity was reduced. Negative effects of O3 were very marked during the early part of the treatment period, but the effects of CO2 were positive. CO2 mitigated the oxidative damage caused by O3 and promoted the growth of I. decorus. Thus, I. decorus tolerated the two greenhouse gases, and was able to adapt to elevated CO2 and O3 levels. These findings contribute to the current knowledge base on the response of bamboo to global climate change.Keywords: Antioxidant Enzyme, Carbon Dioxide, Indocalamus decorus, Membrane Lipid Peroxidation, Ozone, Photosynthetic Physiology IntroductionThe impacts of global climate change on terrestrial ecosystems are intrinsically complex. In spite of the complexity, they are issues of broad public concern. Carbon dioxide (CO2) and ozone (O3) are important greenhouse gases that drive global climate change. A wide range of human activities, such as the rapid development of industry and transportation, heavy use of nitrogen fertilizers in agriculture, significant emissions of nitrogen oxides (NOx) and oxygen-containing volatile organic compounds (VOCs), have increased atmospheric CO2 and O3 concentrations to levels that are significantly higher than those prior to the industrial revolution. The rate of increase has been relatively stable over time. By 2050, the atmospheric CO2 concentration is expected to reach concentrations that will be double those of preindustrial levels; O3 is increasing by up to 2.5% annually (IPCC 2007). Significant i...

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Responses of photosynthesis, chlorophyll fluorescence, and grain yield of maize to controlled‐release urea and irrigation after anthesis

GuoQing

Ning

et al. 2013

Z. Pflanzenernähr. Bodenk.

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Controlled‐release urea (CRU) is a new type of urea, which may increase crop nitrogen (N)‐use efficiency compared with conventional urea (CU), but the conditions where it outperforms urea are not well defined. A field experiment assessing responses of plant growth and grain yield of maize to CRU and irrigation was conducted on a typical agricultural farm in Shandong, China. Five treatments of the two types of urea (75, 150 kg N ha–1, 0 kg N ha–1) were applied as basal fertilizer when sowing maize, and two water treatments (W0 and W1) were used 23 d after anthesis. Net photosynthetic rate (PN) and chlorophyll concentration as well as leaf‐area index (LAI) increased significantly by both CRU and CU application, with the increases being larger in CRU‐treated plants than in CU‐treated plants at grain filling and maturing stages. CRU significantly enhanced the maximum photochemical efficiency (Fv / Fm), PSII coefficient of photochemical fluorescence quenching (qP), and actual quantum yield of PSII electron transformation (ΦPSII) but decreased the nonphotochemical quenching (NPQ). Cob‐leaf N concentration of CRU‐treated plants was significantly higher than that of CU‐treated plants under no irrigation, but not in the irrigation treatment 30 d after anthesis. Significant positive correlations were found between cob‐leaf N concentration and PN both with and without irrigation. Grain yield of maize was significantly higher in the CRU treatment than in the CU treatment under both irrigation conditions. In conclusion, CRU as a basal application appeared to increase the N‐use efficiency for maize relative to CU especially by maintaining N supply after anthesis.

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Effects of different ozone exposure regimes on photosynthesis, assimilates and thousand grain weight in spring wheat

Cited by 41 publications

References 32 publications

Response of gas exchange and yield components of field-grown Triticum aestivum L. to elevated ozone in China

Response of gas exchange and yield components of field-grown Triticum aestivum L. to elevated ozone in China

Adaptability of Indocalamus decorus to climate change based on physiological and biochemical responses to elevated carbon dioxide and ozone

Responses of photosynthesis, chlorophyll fluorescence, and grain yield of maize to controlled‐release urea and irrigation after anthesis

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