Erratum to “Structural and physiological responses to ozone in Manna ash (Fraxinus ornus L.) leaves of seedlings and mature trees under controlled and ambient conditions” [Science of the Total Environment 407 (2009) 1631–1643]

Paoletti, Elena; Contran, Nicla; Bernasconi, Petra; Günthardt‐Goerg, Madeleine S.; Vollenweider, Pierre

doi:10.1016/j.scitotenv.2010.01.022

Cited by 5 publications

(2 citation statements)

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“…Moreover, previous studies have suggested that F . ornus is moderately sensitive to O 3 [ 51 ], whereas Q . ilex was considered to be tolerant to this pollutant [ 11 , 15 , 52 ]; however, to the best of our knowledge, these two species have not yet been compared directly.…”

Section: Introductionmentioning

confidence: 99%

Functional indicators of response mechanisms to nitrogen deposition, ozone, and their interaction in two Mediterranean tree species

et al. 2017

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The effects of nitrogen (N) deposition, tropospheric ozone (O3) and their interaction were investigated in two Mediterranean tree species, Fraxinus ornus L. (deciduous) and Quercus ilex L. (evergreen), having different leaf habits and resource use strategies. An experiment was conducted under controlled condition to analyse how nitrogen deposition affects the ecophysiological and biochemical traits, and to explore how the nitrogen-induced changes influence the response to O3. For both factors we selected realistic exposures (20 kg N ha-1 yr-1 and 80 ppb h for nitrogen and O3, respectively), in order to elucidate the mechanisms implemented by the plants. Nitrogen addition resulted in higher nitrogen concentration at the leaf level in F. ornus, whereas a slight increase was detected in Q. ilex. Nitrogen enhanced the maximum rate of assimilation and ribulose 1,5-bisphosphate regeneration in both species, whereas it influenced the light harvesting complex only in the deciduous F. ornus that was also affected by O3 (reduced assimilation rate and accelerated senescence-related processes). Conversely, Q. ilex developed an avoidance mechanism to cope with O3, confirming a substantial O3 tolerance of this species. Nitrogen seemed to ameliorate the harmful effects of O3 in F. ornus: the hypothesized mechanism of action involved the production of nitrogen oxide as the first antioxidant barrier, followed by enzymatic antioxidant response. In Q. ilex, the interaction was not detected on gas exchange and photosystem functionality; however, in this species, nitrogen might stimulate an alternative antioxidant response such as the emission of volatile organic compounds. Antioxidant enzyme activity was lower in plants treated with both O3 and nitrogen even though reactive oxygen species production did not differ between the treatments.

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Section: Introductionmentioning

confidence: 99%

Functional indicators of response mechanisms to nitrogen deposition, ozone, and their interaction in two Mediterranean tree species

et al. 2017

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“…Hence, the responses of functional traits to MC treatment in our study provided evidence for the exceedance of the stress tolerance threshold in Acer trees. Slightly higher gas exchange levels in young and still asymptomatic leaves under ozone stress contrasted with findings based on mature foliage [ 30 , 78 , 79 ]. This difference may relate to the unresponsiveness of still-developing foliage [ 31 ] or to compensation mechanisms [ 58 ].…”

Section: Discussionmentioning

confidence: 79%

Responses to Airborne Ozone and Soilborne Metal Pollution in Afforestation Plants with Different Life Forms

Günthardt-Goerg,

Schläpfer,

Vollenweider

2023

Plants

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With the current increases in environmental stress, understanding species-specific responses to multiple stress agents is needed. This science is especially important for managing ecosystems that are already confronted with considerable pollution. In this study, responses to ozone (O3, ambient daily course values + 20 ppb) and mixed metal contamination in soils (MC, cadmium/copper/lead/zinc = 25/1100/2500/1600 mg kg−1), separately and in combination, were evaluated for three plant species (Picea abies, Acer pseudoplatanus, Tanacetum vulgare) with different life forms and ecological strategies. The two treatments elicited similar stress reactions, as shown by leaf functional traits, gas exchange, tannin, and nutrient markers, irrespective of the plant species and life form, whereas the reactions to the treatments differed in magnitude. Visible and microscopic injuries at the organ or cell level appeared along the penetration route of ozone and metal contamination. At the whole plant level, the MC treatment caused more severe injuries than the O3 treatment and few interactions were observed between the two stress factors. Picea trees, with a slow-return strategy, showed the highest stress tolerance in apparent relation to an enhancement of conservative traits and an exclusion of stress agents. The ruderal and more acquisitive Tanacetum forbs translocated large amounts of contaminants above ground, which may be of concern in a phytostabilisation context. The deciduous Acer trees—also with an acquisitive strategy—were most sensitive to both stress factors. Hence, species with slow-return strategies may be of particular interest for managing metal-polluted sites in the current context of multiple stressors and for safely confining soil contaminants below ground.

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Macro- and microscopic leaf injury triggered by ozone stress in beech foliage (Fagus sylvatica L.)

Vollenweider¹,

Günthardt‐Goerg²,

Menard³

et al. 2019

Annals of Forest Science

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& Key message The diversity of structural injury underlying visible symptoms by ozone stress resulted from the succession of degenerative processes and programmed-cell death events, depending on the ozone uptake and varying on a year-toyear basis. & Context The effects of tropospheric ozone (O 3 ) on the vegetation will remain a lasting concern during the twenty-first century, and deeper understanding of functional and structural responses to O 3 in plant foliage in a changing environment is needed. & Aims Comprehensive analysis of the O 3 injury spectrum, with a view to functional understanding of cellular processes in response to varying O 3 doses. & Methods Characterization of macro-and microscopic symptoms in the sun crown foliage of adult trees exposed to ambient and twice ambient O 3 levels in a Free Air O 3 Enrichment (FACE) experiment using light and electron microscopy. & Results Visible injury triggered by O 3 resulted from (i) degenerative processes of varying severity (photobleaching, accelerated cell senescence, ACS), (ii) programmed cell death with disruption of cell content (hypersensitive reaction-like, HR-like) and occasional leakage of cellular debris into the apoplast, (iii) overlapping degenerative and disruptive processes, primarily in the upper mesophyll and within organelles prone to oxidative stress (chloroplasts and mitochondria) and (iv) necrosis in lower mesophyll with leakage of cellular debris in the intracellular space. & Conclusion Especially the degenerative and disruptive traits showed contrasting structural features. In the case of stippling symptoms, the structural variability was particularly high, as a consequence of interactions between early degenerative and late disruptive processes. These findings thus confirmed the close dependency of processes-and a further spectrum of ozone injury-on rates of ozone uptake. Such relationships and development of injury, as observed in the case of beech (Fagus sylvatica L.) foliage, are expected to be basically similar in other broadleaved tree species.

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Erratum to “Structural and physiological responses to ozone in Manna ash (Fraxinus ornus L.) leaves of seedlings and mature trees under controlled and ambient conditions” [Science of the Total Environment 407 (2009) 1631–1643]

Cited by 5 publications

References 0 publications

Functional indicators of response mechanisms to nitrogen deposition, ozone, and their interaction in two Mediterranean tree species

Functional indicators of response mechanisms to nitrogen deposition, ozone, and their interaction in two Mediterranean tree species

Responses to Airborne Ozone and Soilborne Metal Pollution in Afforestation Plants with Different Life Forms

Macro- and microscopic leaf injury triggered by ozone stress in beech foliage (Fagus sylvatica L.)

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