Dose-response studies with the antiozonant ethylenediurea (EDU), applied as a soil drench to two growth substrates, on greenhouse-grown varieties of Phaseolus vulgaris L.

Kostka-Rick, Reinhard; Manning, William J.

doi:10.1016/0269-7491(93)90163-i

Cited by 27 publications

(7 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The chemical compound N ‐[2‐(2‐oxo‐1‐imidazolidinyl)ethyl])‐ N ′‐phenylurea (ethylenediurea, EDU) can be used as an antioxidant and ozone‐protective chemical (Lee et al 1992, Kostka‐Rick and Manning 1993, Miller et al 1994, Manning 2000, Contran et al 2009). After application of EDU as a foliar spray, a growing medium drench or stem injection (Manning 2005), EDU ends up in the leaf apoplast (Roberts et al 1987, Gatta et al 1997).…”

Section: Introductionmentioning

confidence: 99%

Solar UV‐B effects on PSII performance in Betula nana are influenced by PAR level and reduced by EDU: results of a 3‐year experiment in the High Arctic

Mikkelsen¹,

Ro‐Poulsen

Arndal

et al. 2012

Physiologia Plantarum

View full text Add to dashboard Cite

The long-term and diurnal responses of photosystem II (PSII) performance to near-ambient UV-B radiation were investigated in High Arctic Betula nana. We conducted an UV exclusion experiment with five replicated blocks consisting of open control (no filter), photosynthetic active radiation and UV-B transparent filter control (Teflon), UV-B-absorbing filter (Mylar) and UV-AB-absorbing filter (Lexan). Ethylenediurea (EDU), a chemical normally used to protect plants against ozone injury, was sprayed on the leaves both in the field and in an additional laboratory study to investigate if EDU mitigated the effects of UV-B. Chlorophyll-a fluorescence induction curves were used for analysis of OJIP test parameters. Near-ambient UV-B radiation reduced across season maximum quantum yield (TR(o) /ABS = F(v) /F(m)), approximated number of active PSII reaction center (RC/ABS) and the performance index (PI(ABS)), despite improved leaf screening against UV-B with higher content of UV-B-absorbing compounds and a lower specific leaf area. EDU application counteracted the negative impact of UV-B on TR(o) /ABS, RC/ABS and PI(ABS) . This indicates that the mechanisms behind UV-B and ozone damage share some common features. The midday depression was present in all treatments, but TR(o) /ABS and PI(ABS) were persistently lower in near-ambient UV-B compared to UV-B reduction. The recovery phase was particularly impaired in near-ambient UV-B and interactive effects between treatment × hour raised TR(o) /ABS, RC/ABS and PI(ABS) higher in reduced UV-B compared to near-ambient UV-B. This demonstrates current solar UV-B to reduce the PSII performance both on a daily as well as a seasonal basis in this High Arctic species.

show abstract

Section: Introductionmentioning

confidence: 99%

Solar UV‐B effects on PSII performance in Betula nana are influenced by PAR level and reduced by EDU: results of a 3‐year experiment in the High Arctic

Mikkelsen¹,

Ro‐Poulsen

Arndal

et al. 2012

Physiologia Plantarum

View full text Add to dashboard Cite

show abstract

“…A means to ameliorate the potentially harmful exposures of spring and summer UV‐B irradiation levels experienced by low‐ and mid‐latitude crops could have economic benefits to producers. Ethylenenediurea (EDU) is a compound successfully used in a soil drench on crops to ameliorate ozone damage (7–9). An earlier study found that soil uptake of EDU partially ameliorated UV‐B exposures in cucumber, a sensitive crop (10).…”

Section: Introductionmentioning

confidence: 99%

Evaluating UV‐B Effects and EDU Protection in Soybean Leaves Using Fluorescence

Middleton

Kim

Krizek

et al. 2005

Photochem & Photobiology

View full text Add to dashboard Cite

A growth-chamber experiment was conducted to evaluate whether ethylenenediurea (EDU), a chemical shown to be protective against ozone pollution, could ameliorate foliar damage induced by ultraviolet-B (UV-B) radiation exposure in 'Roanoke' soybean (Glycine max L.), a UV-B-sensitive cultivar, and whether these effects could be discriminated using fluorescence (F) observations. The experiment had four treatment groups: control; biologically effective UV-B (18 kJ m(-2) day(-1)); EDU (500 micromol mol(-1)); and both UV-B and EDU (UV/EDU). Measurements included photosynthetic pigments, F image system (FIS) images of adaxial surfaces in four spectral regions (blue, green, red and far-red) and F emission spectra of the pigment extracts produced at two excitation wavelengths, 280 nm (280EX) and 380 nm (380EX). Several F ratios from 280EX, 380EX and the FIS images successfully separated the low UV vs high EDU group responses based on means alone, with intermediate values for controls and the combined UV/EDU groups. A UV-B/blue emission ratio, F315/F420 (280EX), was correlated with chlorophyll content (microg cm(-2))(R = 0.88, P < 0.001), as was a ratio of emissions at two UV-A wavelengths: F330/F385 (280EX) (R = 0.87). These two 280EX ratios were also linearly correlated with emission ratios produced by 380EX, such as the far-red/green ratio, F730/F525 (380EX) (R = 0.92, P < 0.001), and clearly distinguished the UV-B and EDU groups separately, and which bracketed the similar intermediate responses of the UV/EDU and control groups. The FIS images additionally captured the following anatomical spatial patterns across the leaf surfaces: (1) emissions of UV-B-irradiated leaves were more uniform but lower in intensity than those of other groups; and (2) emissions of EDU-treated leaves exhibited the greatest variation in spatial patterns because veins had elevated blue F and leaf edges had enhanced red and far-red F. This experiment supports the hypothesis that EDU substantially ameliorated UV-B damage to foliage, a result that relied on the combined use of FIS images and emission spectra.

show abstract

“…One chemical compound that has been found to induce cellular defense against ozone damage in a number of plant species is ethylenediurea (EDU : N-[2-(2-oxo-1-imidiazolidinyl) ethyl]-N′-phenylurea, Lee and Bennett 1985). EDU has been shown to provide protection against foliar injury from ozone if applied as a foliar spray or through soil application (Carnahan et al 1978, Cathey and Heggestad 1982, Kosta-Rick and Manning 1993, Miller et al 1994. In a few studies, high concentrations of EDU have been reported as causing visible foliar injury and decreasing crop yield (Bennett et al 1981, Kosta-Rick and Manning 1993, Miller et al 1994.…”

Section: Introductionmentioning

confidence: 99%

Evaluating UV-B effects and EDU protection in cucumber leaves using fluorescence images and fluorescence emission spectra

Krizek

Middleton

Sandhu

et al. 2001

Journal of Plant Physiology

View full text Add to dashboard Cite

Dose-response studies with the antiozonant ethylenediurea (EDU), applied as a soil drench to two growth substrates, on greenhouse-grown varieties of Phaseolus vulgaris L.

Cited by 27 publications

References 24 publications

Solar UV‐B effects on PSII performance in Betula nana are influenced by PAR level and reduced by EDU: results of a 3‐year experiment in the High Arctic

Solar UV‐B effects on PSII performance in Betula nana are influenced by PAR level and reduced by EDU: results of a 3‐year experiment in the High Arctic

Evaluating UV‐B Effects and EDU Protection in Soybean Leaves Using Fluorescence

Evaluating UV-B effects and EDU protection in cucumber leaves using fluorescence images and fluorescence emission spectra

Contact Info

Product

Resources

About