BVOC emissions, photosynthetic characteristics and changes in chloroplast ultrastructure of Platanus orientalis L. exposed to elevated CO2 and high temperature

Velikova, Violeta; Tsonev, Tsonko; Barta, Csengele; Centritto, Mauro; Koleva, Dimitrina; Stefanova, M.; Busheva, Mira; Loreto, Francesco

doi:10.1016/j.envpol.2009.05.007

Cited by 41 publications

(30 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…7 Correlation between the light-saturated isoprene emission rate, I max,Q , and the true quantum yield for isoprene emission, a T , in hybrid aspen plants grown either at CO 2 concentration of 380 lmol mol À1 or 780 lmol mol À1 and measured both at 380 lmol mol À1 (A380 for ambient-[CO 2 ]-grown and E380 for elevated-[CO 2 ]-grown plants) and 780 lmol mol À1 (A780 and E780). In contrast, in all studies reporting reduced isoprene emissions under elevated [CO 2 ], there was also downregulation in photosynthetic capacity (Darbah et al, 2010 one aspen clone); (Possell et al, 2004;Scholefield et al, 2004;Monson et al, 2007;Possell & Hewitt, 2009Velikova et al, 2009;Wilkinson et al, 2009). Symbols as in Fig.…”

Section: Effects Of Growth Co 2 On Isoprene Emission Capacitymentioning

confidence: 94%

“…Some studies demonstrate reduced emission capacity in elevated-CO 2 -grown plants, including Acacia nigrescens (Possell & Hewitt, 2011), Liquidambar styraciflua Wilkinson et al, 2009), Populus tremuloides (Darbah et al, 2010 one clone), (Sharkey et al, 1991), Eucalyptus globulus, P. tremuloides and P. deltoides , Phragmites australis (Scholefield et al, 2004), and Platanus orientalis (Velikova et al, 2009). Some studies demonstrate reduced emission capacity in elevated-CO 2 -grown plants, including Acacia nigrescens (Possell & Hewitt, 2011), Liquidambar styraciflua Wilkinson et al, 2009), Populus tremuloides (Darbah et al, 2010 one clone), (Sharkey et al, 1991), Eucalyptus globulus, P. tremuloides and P. deltoides , Phragmites australis (Scholefield et al, 2004), and Platanus orientalis (Velikova et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced isoprene emission capacity and altered light responsiveness in aspen grown under elevated atmospheric CO₂ concentration

Sun

Niinemets

Hüve

et al. 2012

Global Change Biology

View full text Add to dashboard Cite

Controversial evidence of CO2‐responsiveness of isoprene emission has been reported in the literature with the response ranging from inhibition to enhancement, but the reasons for such differences are not understood. We studied isoprene emission characteristics of hybrid aspen (Populus tremula x P. tremuloides) grown under ambient (380 μmol mol−1) and elevated (780 μmol mol−1) [CO2] to test the hypothesis that growth [CO2] effects on isoprene emission are driven by modifications in substrate pool size, reflecting altered light use efficiency for isoprene synthesis. A novel in vivo method for estimation of the pool size of the immediate isoprene precursor, dimethylallyldiphosphate (DMADP) and the activity of isoprene synthase was used. Growth at elevated [CO2] resulted in greater leaf thickness, more advanced development of mesophyll and moderately increased photosynthetic capacity due to morphological “upregulation”, but isoprene emission rate under growth light and temperature was not significantly different among ambient‐ and elevated‐[CO2]‐grown plants independent of whether measured at 380 μmol mol−1 or 780 μmol mol−1 CO2. However, DMADP pool size was significantly less in elevated‐[CO2]‐grown plants, but this was compensated by increased isoprene synthase activity. Analysis of CO2 and light response curves of isoprene emission demonstrated that the [CO2] for maximum isoprene emission was shifted to lower [CO2] in elevated‐[CO2]‐grown plants. The light‐saturated isoprene emission rate (Imax,Q) was greater, but the quantum efficiency at given Imax,Q was less in elevated‐[CO2]‐grown plants, especially at higher CO2 measurement concentration, reflecting stronger DMADP limitation at lower light and higher [CO2]. These results collectively demonstrate important shifts in light and CO2‐responsiveness of isoprene emission in elevated‐[CO2]‐acclimated plants that need consideration in modeling isoprene emissions in future climates.

show abstract

Section: Effects Of Growth Co 2 On Isoprene Emission Capacitymentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Enhanced isoprene emission capacity and altered light responsiveness in aspen grown under elevated atmospheric CO₂ concentration

Sun

Niinemets

Hüve

et al. 2012

Global Change Biology

View full text Add to dashboard Cite

show abstract

“…Fares et al (2006) suggested that the increase of isoprene emission in ozone-treated leaves is due to an antioxidant response to the stress. Isoprene can be considered as an antioxidant which defends leaves against ozone and other biotic and abiotic stresses Sharkey et al 2008;Velikova et al 2009;Vickers et al 2009). Isoprene concentration inside the leaves is known to be much higher than in the atmosphere (Loreto et al 1996), and the intercellular concentration of isoprene may indeed be sufficient to remove reactive oxygen species (Loreto and Velikova 2001) or stabilize membranes (Sharkey and Yeh 2001).…”

Section: Volatile Emissions: Isoprenementioning

confidence: 99%

Volatile emissions and phenolic compound concentrations along a vertical profile of Populus nigra leaves exposed to realistic ozone concentrations

et al. 2010

Self Cite

View full text Add to dashboard Cite

Plants are exposed to increasing levels of tropospheric ozone concentrations. This pollutant penetrates in leaves through stomata and quickly reacts inside leaves, thus making plants valuable ozone sinks, but at the same time triggers oxidation processes which lead to leaf injuries. To counteract these negative effects, plants produce an array of antioxidants which react with ozone and reactive molecules which ozone generates in the leaf tissues. In this study, we measured the effect of an ozone concentration which is likely to be attained in many areas of the world in the near future (80 ppb) on leaves of the vertical profile of the widespread agroforestry species Populus nigra. Changes in (1) physiological parameters (photosynthesis and stomatal conductance), (2) ozone uptake, (3) emission of volatile organic compounds (VOCs, i.e. isoprene, methanol and other oxygenated compounds), (4) concentration of antioxidant surface compounds, and (5) concentration of phenolic compounds were assessed. The aim was to assess whether the defensive pathways leading to isoprenoids and phenolics formation were induced when a moderate and chronic increment of ozone is not able to damage photosynthesis. No visual injuries and minor changes in physiology and ozone uptake were observed. The emission of isoprene and oxygenated six-carbon (C6) volatiles were inhibited by ozone, whereas methanol emission was increased, especially in developing leaves. We interpret these results as suggesting an ontogenetic shift in ozone-treated leaves, leading to a slower development and a faster senescence. Most surface and phenolic compounds showed a declining trend in concentration from the youngest to the fully expanded leaves. Ozone reduced the concentrations of chlorogenic acid derivatives at the leaf surface, whereas in total leaf extracts a metabolic shift towards few phenolics with higher antioxidant capacity was observed.

show abstract

“…Isoprene seems to be implicated in protection against different environmental stresses (reviewed in Vickers et al, 2009;Loreto and Schnitzler, 2010;Niinemets, 2010). It has been hypothesized that isoprene preserves thylakoid membrane stability and chloroplasts ultrastructure, and/or exerts antioxidant properties (Loreto and Velikova, 2001;Velikova et al, 2009Velikova et al, , 2011Loreto et al, 2014a).…”

Section: Introductionmentioning

confidence: 99%

Isoprene emission in the monocot Arundineae tribe in relation to functional and structural organization of the photosynthetic apparatus

Ahrar

Doneva

Koleva

et al. 2015

Environmental and Experimental Botany

Self Cite

View full text Add to dashboard Cite

BVOC emissions, photosynthetic characteristics and changes in chloroplast ultrastructure of Platanus orientalis L. exposed to elevated CO2 and high temperature

Cited by 41 publications

References 72 publications

Enhanced isoprene emission capacity and altered light responsiveness in aspen grown under elevated atmospheric CO₂ concentration

Enhanced isoprene emission capacity and altered light responsiveness in aspen grown under elevated atmospheric CO₂ concentration

Volatile emissions and phenolic compound concentrations along a vertical profile of Populus nigra leaves exposed to realistic ozone concentrations

Isoprene emission in the monocot Arundineae tribe in relation to functional and structural organization of the photosynthetic apparatus

Contact Info

Product

Resources

About

BVOC emissions, photosynthetic characteristics and changes in chloroplast ultrastructure of Platanus orientalis L. exposed to elevated CO2 and high temperature

Cited by 41 publications

References 72 publications

Enhanced isoprene emission capacity and altered light responsiveness in aspen grown under elevated atmospheric CO2 concentration

Enhanced isoprene emission capacity and altered light responsiveness in aspen grown under elevated atmospheric CO2 concentration

Volatile emissions and phenolic compound concentrations along a vertical profile of Populus nigra leaves exposed to realistic ozone concentrations

Isoprene emission in the monocot Arundineae tribe in relation to functional and structural organization of the photosynthetic apparatus

Contact Info

Product

Resources

About

Enhanced isoprene emission capacity and altered light responsiveness in aspen grown under elevated atmospheric CO₂ concentration

Enhanced isoprene emission capacity and altered light responsiveness in aspen grown under elevated atmospheric CO₂ concentration