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Adam, Gillian; Duncan, Harrry

doi:10.1023/a:1021228327540

Cited by 47 publications

(13 citation statements)

References 3 publications

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“…To assess the ability of M. sativa plants to resist high levels of diesel fuel toxicity, the diesel fuel concentrations used in the germination study were comparable to, or higher than, those used in previous studies involving organic contaminants [ 19 , 20 , 21 , 22 ]. Similarly, diesel fuel imbibition was also used to mimic extreme conditions of diesel fuel exposure [ 23 ], which enabled us to determine to what extent does extreme exposure to diesel fuel affect M. sativa seed viability.…”

Section: Discussionmentioning

confidence: 99%

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Assessing the Effect of Diesel Fuel on the Seed Viability and Germination of Medicago sativa Using the Event-Time Model

Eze

Hose

George

2020

Plants

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The remediation of contaminated sites using plant-based techniques has gained increasing attention in recent decades. However, information on the effects of contaminant imbibition on seed viability and germination rates are often lacking in the literature. To this end, our research investigated, by means of an event-time model, the effect of diesel fuel imbibition on the seed viability and germination rate of Medicago sativa, a plant species with great potential for remediation of organic contaminants. The event-time model provided an accurate and biologically relevant method for analysing germination data. Our results reveal that the direct imbibition of diesel fuel by M. sativa seeds for ≤48 h, or their exposure to soil diesel fuel concentrations of 0–10 g/kg diesel fuel, affects their germination rates, as shown by increasing t50 values from 90.6 (±2.78) to 114.2 (±2.67) hours, without significantly affecting seed viability. On the other hand, diesel fuel imbibition of longer duration, or the exposure of M. sativa seeds to ≥20 g/kg diesel fuel-contaminated soils, leads to no further effect on time to seed emergence. Instead, these conditions compromise seed viability, resulting in a decrease in the proportion of germinated seeds from 0.91 (±0.03) in 10 g/kg diesel fuel contaminated soil to 0.84 (±0.04) and 0.70 (±0.05) in 20 and 30 g/kg diesel fuel-contaminated soils, respectively. The fact that low concentrations of diesel fuel and 0–48 h of direct imbibition delayed seed emergence without adversely affecting the percentage of viable seeds suggests that this inhibitory effect on germination at low diesel fuel exposure could be attributed more to physical constraints rather than biological damage on the seeds. The models used in this study provide an accurate and biologically relevant method for the analyses of germination data. This is vital since expensive germination experiments, be it in the field of toxicology or agriculture, deserve to be accurately analysed.

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Section: Discussionmentioning

confidence: 99%

“…The implication of this is that M. sativa is potentially able to survive in diesel fuel contaminated sites. This ability of a plant to withstand contaminant toxicity or similar abiotic stress in the environment is an important factor in designing and establishing successful remediation and reclamation approaches [ 19 ].…”

Section: Discussionmentioning

confidence: 99%

Assessing the Effect of Diesel Fuel on the Seed Viability and Germination of Medicago sativa Using the Event-Time Model

Eze

Hose

George

2020

Plants

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“…In soil contaminated with petroleum substances, the nitrogen–carbon ratio is disturbed due to the presence of hydrocarbons. This contributes to the inhibition of many nitrogen reactions in the soil (regarding both mineral and organic forms of nitrogen), as well as to a reduction in the intensity of ammonification and nitrification (Adam and Duncan 2003; Kucharski and Jastrzębska 2005, which may explain the reduced levels of nitrogen in the presence of xenobiotics. Moubasher et al (2015) showed that petroleum hydrocarbons usually do not cause a significant change in sulfur levels in the roots and shoots of Bassia scoparia (L.).…”

Section: Discussionmentioning

confidence: 99%

Antioxidant responses of Triticum aestivum plants to petroleum-derived substances

et al. 2018

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Winter common wheat (Triticum aestivum L.) plants were cultivated on petroleum products contaminated soils with and without using biopreparation ZB-01. We determined the impact of soil contamination with petrol, diesel fuel and engine oil on selected antioxidant enzymes and the levels of antioxidants in the leaves of winter wheat. The impact of petroleum products on selected morphological characteristics of the plants, levels of nutrients and heavy metals was also assessed. Winter wheat was relatively resistant to soil contamination with petroleum products, and did not show a significant impact on the morphological characteristics of the plants. The levels of nutrients and heavy metals in the plants depended on the type of pollutant and the analyzed component.‬ Biopreparation ZB-01 generally resulted in an increase in calcium levels in the plants.‬ The winter wheat plants growing in soil contaminated with engine oil were characterized by higher levels of zinc, lead, manganese and cadmium than the control plants.‬ Biopreparation applied to the soil contaminated with petrol resulted in a slight increase in the levels of lead and zinc in the plants.‬ The petroleum products affected the activity of antioxidant enzymes and the levels of antioxidants in the plants.‬ The general markers of soil contaminated with diesel fuel and petrol were POD activity and proline levels. Use of the ZB-01 biopreparation caused an increase in the levels of proline and -SH groups and an increase in the levels of carbon and calcium in the plants and had no effect on the morphological characteristics of plants.‬

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“…In soils contaminated with PDSs, the nitrogen-to-carbon ratio is distorted by the presence of hydrocarbons. This contributes to many nitrogen reactions being curbed in soil and also lowers the intensity of ammonification and nitrification processes (Adam and Duncan 2003). PDSs provide an increased carbon content in soil, which results from their structure (they contain aliphatic hydrocarbons, cycloalkanes, olefins and arenes) (Riffaldi et al 2006; Wyszkowski and Sivitskaya 2012).…”

Section: Discussionmentioning

confidence: 99%

Effect of petroleum-derived substances on life history traits of black bean aphid (Aphis fabae Scop.) and on the growth and chemical composition of broad bean

et al. 2017

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The aim of the study was to determine the effects of various petroleum-derived substances, namely petrol, diesel fuel and spent engine oil, on life history traits and population dynamics of the black bean aphid Aphis fabae Scop. and on growth and chemical composition of its host plant Vicia faba L. Each substance was tested separately, using two concentrations (9 g kg−1 and 18 g kg−1). The experiment was conducted in four replications (four pots with five plants in each pot per treatment). Plants were cultivated in both control and contaminated soils. After six weeks from soil contamination and five weeks from sowing the seeds, observations of the effect of petroleum-derived substances on traits of three successive generations of aphids were conducted. Aphids were inoculated separately on leaves using cylindrical cages hermetically closed on both sides. Contamination of aphid occurred through its host plant. Results showed that all tested substances adversely affected A. fabae life history traits and population dynamics: extension of the prereproductive period, reduction of fecundity and life span, reduction of the population intrinsic growth rate. In broad bean, leaf, roots, and shoot growth was also impaired in most conditions, whereas nutrient and heavy metal content varied according to substances, their concentration, as well as plant part analysed. Results indicate that soil contamination with petroleum-derived substances entails far-reaching changes not only in organisms directly exposed to these pollutants (plants), but also indirectly in herbivores (aphids) and consequently provides information about potential negative effects on further links of the food chain, i.e., for predators and parasitoids.

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Cited by 47 publications

References 3 publications

Assessing the Effect of Diesel Fuel on the Seed Viability and Germination of Medicago sativa Using the Event-Time Model

Assessing the Effect of Diesel Fuel on the Seed Viability and Germination of Medicago sativa Using the Event-Time Model

Antioxidant responses of Triticum aestivum plants to petroleum-derived substances

Effect of petroleum-derived substances on life history traits of black bean aphid (Aphis fabae Scop.) and on the growth and chemical composition of broad bean

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