Evaluation of Di-1-p-Menthene as Antiozonant on Bel-W3 Tobacco Plants, as Compared with Ethylenediurea

Agathokleous, Evgenios; Papatheohari, Yolanda

doi:10.1007/s11270-014-2139-y

Cited by 21 publications

(18 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The plant size remained indifferent between EDU treatments at the end of the experiment, in agreement with earlier experiments where EDU did not affect plant morphology under quite low O 3 exposures (Agathokleous et al, 2014(Agathokleous et al, , 2016cAinsworth and Ashmore, 1992;Ashrafuzzaman et al, 2017). These results may suggest an indirect EDU-induced stimulation of plants at dosespecific thresholds (Agathokleous et al, 2016a;Kostka-Rick and Manning, 1993a,b) through disruptions in homeostasis that lead to overcompensation (Calabrese, 2014(Calabrese, , 2016Agathokleous, 2017).…”

Section: Discussionsupporting

confidence: 88%

High doses of ethylenediurea (EDU) as soil drenches did not increase leaf N content or cause phytotoxicity in willow grown in fertile soil

Agathokleous

Paoletti

Manning

et al. 2018

Ecotoxicology and Environmental Safety

Self Cite

View full text Add to dashboard Cite

Ground-level ozone (O) levels are nowadays elevated in wide regions of the Earth, causing significant effects on plants that finally lead to suppressed productivity and yield losses. Ethylenediurea (EDU) is a chemical compound which is widely used in research projects as phytoprotectant against O injury. The EDU mode of action remains still unclear, while there are indications that EDU may contribute to plants with nitrogen (N) when the soil is poor in N and the plants have relatively small leaf area. To reveal whether the N content of EDU acts as a fertilizer to plants when the soil is not poor in N and the plants have relatively large total plant leaf area, willow plants (Salix sachalinensis Fr. Schm) were exposed to low ambient O levels and treated ten times (9-day interval) with 200mL soil drench containing 0, 800 or 1600mg EDU L. Fertilizer was added to a nutrient-poor soil, and the plants had an average plant leaf area of 9.1m at the beginning of EDU treatments. Indications for EDU-induced hormesis in maximum electron transport rate (J) and ratio of intercellular to ambient CO concentration (C:C) were observed at the end of the experiment. No other EDU-induced effects on leaf greenness and N content, maximum quantum yield of photosystem II (F/F), gas exchange, growth and matter production suggest that EDU did not act as N fertilizer and did not cause toxicity under these experimental conditions.

show abstract

Section: Discussionsupporting

confidence: 88%

High doses of ethylenediurea (EDU) as soil drenches did not increase leaf N content or cause phytotoxicity in willow grown in fertile soil

Agathokleous

Paoletti

Manning

et al. 2018

Ecotoxicology and Environmental Safety

Self Cite

View full text Add to dashboard Cite

show abstract

“…Contrastingly, O3 sensitivity of TChl/TCar was 1.9 times higher (δ) than that of Chla/Chlb. Such observation is consistent with higher sensitivity of TChl than TCar found in C3 plants (Agathokleous et al 2014(Agathokleous et al , 2016cPellegrini 2014). Alterations in TChl/TCar indicate malfunctions in plant physiological and phenological status caused by stress-induced photooxidation through breakdown of chlorophylls and a need for photoprotection (Peñuelas et al 1995;Pellegrini 2014).…”

Section: Discussionsupporting

confidence: 63%

Stem and crown growth of Japanese larch and its hybrid F1 grown in two soils and exposed to two free-air O3 regimes

Agathokleous

Amelie

Kita

et al. 2017

Environ Sci Pollut Res

View full text Add to dashboard Cite

Ozone (O) pollution and soil infertility may negatively affect boreal forests across the Northern Hemisphere. Impacts to economically and ecologically important larches (Larix sp., Pinacaeae) are particularly concerning. Using a free air O enrichment (FACE) system, we investigated the effect of 2-year elevated O exposure (≈66 nmol mol) on Japanese larch (L. kaempferi) and its hybrid larch F (L. gmelinii var. japonica × L. kaempferi) planted directly into either fertile brown forest soil (BF) or BF mixed with infertile volcanic ash soil (VA). Overall, photosynthetic pigmentation and the growth performance of the stem and crown were reduced in both taxa exposed to elevated O. Furthermore, hybrid larch, in both O treatments, performed better than Japanese larch. This finding contradicts findings of prior experiments with potential experimental artifacts of O exposure facilities and root restrictions. Elevated O also disproportionately inhibited stem diameter growth and caused an imbalance in chlorophylls a/b and chlorophyll/carotenoid ratios. Hybrid and Japanese larches grown in BF and VA had a significantly lower drop of stem diameter over the run of stem height (from base to top) when exposed to elevated O, compared to ambient O. This finding indicates altered stem shape under elevated O. Among 11 response variables, there were no significant interactions between O treatment and taxa. There was also no significant interaction of soil condition and taxa, suggesting that the two larches shared a similar response to O and soil type. Understanding the performance of hybrid larch in relation to its parent species has ramifications for breeding success in a soil-degraded and O-polluted environment.

show abstract

“…Several studies were investigating the possibility to increase the ozone tolerance of plants by external application of ozone-scavenging compounds (Gilbert et al, 1977;Loreto et al, 2001;Vickers et al, 2009a;Singh and Agrawal, 2010;Agathokleous et al, 2014) or by enabling the emission of volatile terpenoids in transgenic plants (Vickers et al, 2009b;Palmer-Young et al, 2015). We show here that some of the tobacco varieties investigated in our experiments are intrinsically equipped with ozone scavenging compounds located on their leaf cuticula.…”

Section: Introductionmentioning

confidence: 72%

Plant surface reactions: an opportunistic ozone defence mechanism impacting atmospheric chemistry

et al. 2016

View full text Add to dashboard Cite

Abstract. Elevated tropospheric ozone concentrations are considered a toxic threat to plants, responsible for global crop losses with associated economic costs of several billion dollars per year. Plant injuries have been linked to the uptake of ozone through stomatal pores and oxidative damage of the internal leaf tissue. But a striking question remains: can surface reactions limit the stomatal uptake of ozone and therefore reduce its detrimental effects to plants?In this laboratory study we could show that semi-volatile organic compounds exuded by the glandular trichomes of different Nicotiana tabacum varieties are an efficient ozone sink at the plant surface. In our experiments, different diterpenoid compounds were responsible for a strongly varietydependent ozone uptake of plants under dark conditions, when stomatal pores are almost closed. Surface reactions of ozone were accompanied by a prompt release of oxygenated volatile organic compounds, which could be linked to the corresponding precursor compounds: ozonolysis of cis-abienol (C 20 H 34 O) -a diterpenoid with two exocyclic double bonds -caused emissions of formaldehyde (HCHO) and methyl vinyl ketone (C 4 H 6 O). The ring-structured cembratrien-diols (C 20 H 34 O 2 ) with three endocyclic double bonds need at least two ozonolysis steps to form volatile carbonyls such as 4-oxopentanal (C 5 H 8 O 2 ), which we could observe in the gas phase, too.Fluid dynamic calculations were used to model ozone distribution in the diffusion-limited leaf boundary layer under daylight conditions. In the case of an ozone-reactive leaf surface, ozone gradients in the vicinity of stomatal pores are changed in such a way that the ozone flux through the open stomata is strongly reduced.Our results show that unsaturated semi-volatile compounds at the plant surface should be considered as a source of oxygenated volatile organic compounds, impacting gas phase chemistry, as well as efficient ozone sink improving the ozone tolerance of plants.

show abstract

Evaluation of Di-1-p-Menthene as Antiozonant on Bel-W3 Tobacco Plants, as Compared with Ethylenediurea

Cited by 21 publications

References 50 publications

High doses of ethylenediurea (EDU) as soil drenches did not increase leaf N content or cause phytotoxicity in willow grown in fertile soil

High doses of ethylenediurea (EDU) as soil drenches did not increase leaf N content or cause phytotoxicity in willow grown in fertile soil

Stem and crown growth of Japanese larch and its hybrid F1 grown in two soils and exposed to two free-air O3 regimes

Plant surface reactions: an opportunistic ozone defence mechanism impacting atmospheric chemistry

Contact Info

Product

Resources

About