Effects of tropospheric ozone on white clover plants exposed in open-top chambers or protected by the antioxidant ethylene-diurea (EDU)

Fumagalli, I.; Mignanego, L.; Violini, G.

doi:10.1051/agro:19970502

Cited by 15 publications

(7 citation statements)

References 18 publications

(19 reference statements)

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“…lets were observed for some pots of the NC-S genotype; such symptoms have previously been described by Fumagalli et al (2007). The degree of visible injury symptoms was not so extended; however, the vigor of the plants in the NC-R pots was stronger in comparison with the plants in the NC-S pots, which were less green and cachectic.…”

Section: White Cloversupporting

confidence: 50%

Integrated assessment of ambient ozone phytotoxicity in Greece's Tripolis Plateau

Saitanis

Panagopoulos

Dasopoulou

et al. 2015

J. Agric. Meteorol.

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This is the first report of air pollution monitored in Greece's Tripolis Plateau. We investigated ambient ozone concentrations and estimated its phytotoxicity potential based on three approaches: i) continuous instrumental monitoring at one station in the town, ii) phytodetection mapping with Bel-W3 tobacco plants in a network of 15 stations and iii) evaluation of ozone phytotoxicity by using the resistant (NC-R) and the sensitive (NC-S) white clover genotypes (the latter group was either sprayed or not sprayed with Ethylenediurea (EDU) or Azoxystrobin as ozone protectants).The hourly ozone concentrations often exceeded 70 nmol mol -1 . The average ozone concentration during the early afternoon hours (12:00-19:00) for June, July and August was 65.4 nmol mol -1 . The monthly AOT40 (accumulated ozone mixing ratios over the threshold of 40 nmol mol -1 ) value was higher in July (9,123 nmol mol -1 h) and lower in October (2,022 nmol mol -1 h).The Bel-W3 plants showed characteristic ozone-induced visible foliar injury symptoms at all the stations of the network, suggesting that ozone was at phytotoxic levels not only in the town, where it was measured, but also throughout the plateau.The white clover revealed a reduction of the epigeous biomass of the NC-S by 36-57% in five harvests. The application of EDU prevented biomass reduction in the NC-S genotype, while Azoxystrobin did not offer significant protection.These results indicate that, in rural areas of Greece, ambient ozone occurs at potentially phytotoxic levels, at least for sensitive plant species.

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Section: White Cloversupporting

confidence: 50%

Integrated assessment of ambient ozone phytotoxicity in Greece's Tripolis Plateau

Saitanis

Panagopoulos

Dasopoulou

et al. 2015

J. Agric. Meteorol.

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“…The results of two experiments (Fumagalli et al 1997), carried out over the same period, but with the seeds of the used plants sowed in different dates, were in fact contradictory. Thus, the amount of EDU assimilated by plants from soil may have been affected by rainfall that sometimes occurred very soon after EDU treatment.…”

Section: The Role Of Soil Substratementioning

confidence: 97%

“…Moreover, there is a lack of evidence from EDU applications as a soil drench to woody plants, especially on the symbiosis with ectomycorrhizal fungi (ECM). We need to Singh et al 2010a, 2010bKostka-Rick et al 1993Wahid et al 2012Bisessar and Palmer, 1984Long and Davis, 1991Bisessar and Palmer, 1984Bisessar and Palmer, 1984Mersie et al 1994Astorino et al 1995Tiwari et al 2005Pleijel et al 1999Kostka-Rick et al 1993 Kostka-Rick and Manning, 1993aElagoz and Manning, 2005Cannon et al 1993Cannon et al 1993Tonneijck and van Dijk, 1997Szantoi et al 2007Kostka-Rick and Manning, 1993aSingh et al 2010a, 2010bKostka-Rick and Manning, 1993aHassan et al 1995Kostka-Rick and Manning, 1993aFumagalli et al 1997Elliott et al 1987Hassan et al 1995Manning et al 2003Szantoi et al 2007Kostka-Rick and Manning, 1993a understand whether EDU per se affects ECM and, if it does, how ECM will respond to such effects in long-term.…”

Section: Description Of the Reviewed Literaturementioning

confidence: 99%

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Ethylene-di-urea (EDU), an effective phytoproctectant against O<sub>3</sub> deleterious effects and a valuable research tool

Agathokleous

Koike

Watanabe

et al. 2015

J. Agric. Meteorol.

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Ground-surface ozone (O 3 ) has been increasing over the last decades, and it is now well known that crop and forestry plants suffer from elevated O 3 levels. Ethylene-di-urea (EDU) is considered a chemical that offers protection to the treated plants against Ο 3 . Increasing evidence on the antiozonate efficacy of EDU against the phytotoxic action of O 3 is becoming more readily available. We aimed to review the current literatures on the EDU effects on plants, summarize the findings, note any problems, and formulate conclusions from the existing researches. EDU is a very promising antiozonant with its antiozonate action being observed when applied to roots in the concentrations of 275.7 to 374.3 mg L -1 , or on leaves in the concentrations of 365.1 to 519.5 mg L -1. There is an evidence that EDU was more effective in some cultivars compared with others although this remains inexplicable. Additionally, the biochemical mechanism of its antiozonate activity is not well understood and requires parallel toxicological studies. In summary, EDU must play an important role in O 3 research in the future.

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“…Biological effects and yield responses attributable to ozone pollution were investigated on several species [8,19,20]. Leaf visible injury results and ecophysiological aspects are described elsewhere [1,17,21,22,26].…”

Section: Introductionmentioning

confidence: 99%

Yield responses of plants exposed to ambient ozone in the river Po Valley (Italy)

Fumagalli

Ambrogi

Mignanego³

2001

Agronomie

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-Experiments with plants grown in filtered and unfiltered open-top chambers have been conducted for a decade at two sites in the Po Valley (Northern Italy). Substantial yield losses were often recorded, showing a varying sensitivity between plants (forage, horticultural and semi-natural plants). The response to ambient air ozone doses seems moreover connected to air temperature and humidity. The need for incorporating selected modifying factors in level-II ozone critical levels is advocated for regions, like the Po Valley, where peculiar climatic conditions and high concentrations of ozone are usually present. ozone / crops / yield / Italy / open-top chambersRésumé -Réponse en relation à la productivité de plantes exposées à l'ozone dans la Vallée du Pô (Italie). Pendant une dizaine d'années on a effectué des essais sur les plantes cultivées en chambres à ciel ouvert avec air filtré et non filtré, installées dans deux postes situés dans la Vallée du Pô (Italie du Nord). On a souvent observé des pertes importantes sur la récolte des plantes exposées à des taux élevés d'ozone (air ambiant non filtré) malgré une diversité entre les espèces utilisées (plantes fourragères, horticoles et demi-naturelles). La réponse aux doses d'ozone troposphérique peut être aussi modifiée par la température et l'humidité de l'air. Il est nécessaire d'incorporer plusieurs facteurs différents de modification dans la formulation des niveaux critiques pour l'ozone (niveau II). Cela est surtout important pour des régions géographiques, telles la Vallée du Pô, où les conditions climatiques particulières et de hautes concentrations d'ozone sont une caractéristique durant l'été. ozone / plantes cultivées / production agricole / Italie / chambres à ciel ouvert

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Effects of tropospheric ozone on white clover plants exposed in open-top chambers or protected by the antioxidant ethylene-diurea (EDU)

Cited by 15 publications

References 18 publications

Integrated assessment of ambient ozone phytotoxicity in Greece's Tripolis Plateau

Integrated assessment of ambient ozone phytotoxicity in Greece's Tripolis Plateau

Ethylene-di-urea (EDU), an effective phytoproctectant against O<sub>3</sub> deleterious effects and a valuable research tool

Yield responses of plants exposed to ambient ozone in the river Po Valley (Italy)

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