Photosynthesis of two poplar clones contrasting in O

Nali, Cristina; Filippi, Ferruccio; Soldatini, Gianfranco; Lorenzini, Giacomo

doi:10.1007/s004680050140

Cited by 9 publications

(13 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous studies (Nali et al 1998;Guidi et al 2001;Loreto and Velikova 2001;Pell et al 1999;Woo and Hinckley 2005;Fares et al 2006;Bagard et al 2008) showed a decrease in photosynthetic parameters due to ozone exposure, but the dose of ozone used in the other studies was generally much higher than the one used in our study. Decreased carbon assimilation in fully expanded leaves, accompanied by increased senescence, was also reported in hybrid poplars after ozone exposure by Bagard et al (2008), whereas no significant changes of photosynthesis were observed in developing leaves.…”

Section: Discussionmentioning

confidence: 46%

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

et al. 2010

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

Section: Discussionmentioning

confidence: 46%

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

et al. 2010

View full text Add to dashboard Cite

show abstract

“…The measurement of solute leakage was performed according to Nali et al [30]. Twenty 8-mm diameter leaf discs per plant were randomly collected, and three independent solute leakage estimations per chamber performed.…”

Section: Solute Leakagementioning

confidence: 99%

Responses of citrus plants to ozone: leaf biochemistry, antioxidant mechanisms and lipid peroxidation

Iglesias

Calatayud

Barreno

et al. 2006

Plant Physiology and Biochemistry

View full text Add to dashboard Cite

“…Elevated atmospheric CO 2 is associated with increased photosynthetic rates, decreased stomatal conductance and transpiration, increased plant growth and potentially higher yields (Bowes 1993;Drake et al 1997;Will and Ceulemans 1997;Pan et al 1998;Tognetti et al 1999). O 3 , on the other hand, inhibits the growth of plants (Heath 1994;Pell et al 1997) by decreasing stomatal conductance and photosynthesis, decreasing the content and activity of Rubisco, decreasing the content of chlorophyll and inducing accelerated senescence (Darrall 1989;Pell et al 1992;Landry and Pell 1993;Pell et al 1994;Karnosky et al 1996;Nali et al 1998). While the individual effects of CO 2 and O 3 on plants are rather well known, their interactive effect on plant growth and metabolism is still a matter of active discussion (Polle et al 1993; Barnes et al 1995;Rao et al 1995;Kull et al 1996;Lippert et al 1997;McKee et al 1997a;Dickson et al 1998;Grams et al 1999;Loats and Rebbeck 1999).…”

Section: Introductionmentioning

confidence: 99%

The effect of elevated carbon dioxide and ozone on leaf- and branch-level photosynthesis and potential plant-level carbon gain in aspen

Noormets

McDonald

Dickson

et al. 2001

Trees

View full text Add to dashboard Cite

Two aspen (Populus tremuloides Michx.) clones, differing in O 3 tolerance, were grown in a freeair CO 2 enrichment (FACE) facility near Rhinelander, Wisconsin, and exposed to ambient air, elevated CO 2 , elevated O 3 and elevated CO 2 +O 3 . Leaf instantaneous light-saturated photosynthesis (P S ) and leaf areas (A) were measured for all leaves of the current terminal, upper (current year) and the current-year increment of lower (1-year-old) lateral branches. An average, representative branch was chosen from each branch class. In addition, the average photosynthetic rate was estimated for the short-shoot leaves. A summing approach was used to estimate potential whole-plant C gain. The results of this method indicated that treatment differences were more pronounced at the plant-than at the leaf-or branch-level, because minor effects within modules accrued in scaling to plant level. The whole-plant response in C gain was determined by the counteracting changes in P S and A. For example, in the O 3 -sensitive clone (259), inhibition of P S in elevated O 3 (at both ambient and elevated CO 2 ) was partially ameliorated by an increase in total A. For the O 3 -tolerant clone (216), on the other hand, stimulation of photosynthetic rates in elevated CO 2 was nullified by decreased total A.

show abstract

Photosynthesis of two poplar clones contrasting in O

Cited by 9 publications

References 0 publications

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

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

Responses of citrus plants to ozone: leaf biochemistry, antioxidant mechanisms and lipid peroxidation

The effect of elevated carbon dioxide and ozone on leaf- and branch-level photosynthesis and potential plant-level carbon gain in aspen

Contact Info

Product

Resources

About