Phytotoxicity of single and combined polycyclic aromatic hydrocarbons toward economic crops

Somtrakoon, Khanitta; Chouychai, Waraporn

doi:10.1134/s1021443712060155

Cited by 34 publications

(22 citation statements)

References 26 publications

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“…The incorporation of biochar with a high content of these contaminants is a concern. Various studies have shown reduced plant growth caused by the toxicity of PAHs [93,94], dioxins [95] and heavy metals [96,97]. The utilization of biochar that contains toxic substances could be detrimental, and could influence plant growth and development, leach into groundwater, and have noxious effects on soil function and microorganisms.…”

Section: Effect Of Potentially Toxic Contaminants In Biochar On Plantmentioning

confidence: 99%

Effects of Biochar on Container Substrate Properties and Growth of Plants—A Review

Huang

Gu²

2019

Horticulturae

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Biochar refers to a processed, carbon-rich material made from biomass. This article provides a brief summary on the effects of biochar on container substrate properties and plant growth. Biochar could be produced through pyrolysis, gasification, and hydrothermal carbonization of various feedstocks. Biochar produced through different production conditions and feedstocks affect its properties and how it performs when incorporated in container substrates. Biochar incorporation affects the physical and chemical properties of container substrates, including bulk density, total porosity, container capacity, nutrient availability, pH, electrical conductivity and cation exchange capacity. Biochar could also affect microbial activities. The effects of biochar incorporation on plant growth in container substrates depend on biochar properties, plant type, percentage of biochar applied and other container substrates components mixed with biochar. A review of the literature on the impact of biochar on container-grown plants without other factors (such as irrigation or fertilization rates) indicated that 77.3% of the studies found that certain percentages of biochar addition in container substrates promoted plant growth, and 50% of the studies revealed that plant growth decreased due to certain percentages of biochar incorporation. Most of the plants tested in these studies were herbaceous plants. More plant species should be tested for a broader assessment of the use of biochar. Toxic substances (heavy metals, polycyclic aromatic hydrocarbons and dioxin) in biochars used in container substrates has rarely been studied. Caution is needed when selecting feedstocks and setting up biochar production conditions, which might cause toxic contaminants in the biochar products that could have negative effects on plant growth.

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Section: Effect Of Potentially Toxic Contaminants In Biochar On Plantmentioning

confidence: 99%

Effects of Biochar on Container Substrate Properties and Growth of Plants—A Review

Huang

Gu²

2019

Horticulturae

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“…Fluorene is widely used for the synthesis of pigments, dyes, polymers, and drugs (Han & Wang, 2009) and it is a toxic compound for plants (Somtrakoon, Chaimeungkoon, Phalaphol, & Chouychai, 2012). This compound shows relatively higher water solubility when compared to many other PAHs (Eom, Rast, Veber, & Vasseur, 2007) and it is one of the most abundant PAHs in the contaminated soils (Watts et al, 2006;Wilcke, 2000), sediments (Nishigima, Weber, & B00EDcego, 2001), and plants (Eom et al, 2007;Watts et al, 2006;Watts, Ballestero, & Gardner, 2008).…”

Section: Public Interest Statementmentioning

confidence: 99%

The physiological effect of fluorene on Triticum aestivum, Medicago sativa, and Helianthus annus

Salehi-Lisar

Deljoo

2015

Cogent Food & Agriculture

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Polycyclic aromatic hydrocarbons (PAHs) are widespread pollutants and can negatively affect plants. Fluorene is a prevalent PAH in the contaminated environment. In this study, the effects of higher concentrations of fluorene in soil on rate of seed germination, growth, and the physiological parameters of wheat, sunflower, and alfalfa were studied. The results showed that the higher concentration of fluorene decreased rate of seed germination and seedlings growth of plants. Wheat showed the highest resistance at seed germination and seedlings growth phases, and sunflower was the most sensitive species at both stages. Therefore, it was concluded that higher resistance at seed germination could be followed by the higher resistance of seedlings. Fluorene toxicity also induced oxidative stress in plants as shown by MDA accumulation in the plants. There was a significant correlation between the lower activity of CAT and MDA accumulation in the studied plants. Therefore, CAT could be an important enzyme involved in detoxification of ROS and plants resistance to fluorene toxicity. Depending on plant species and fluorene concentration, photosynthetic pigments content was differently affected.

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“…Corn plant has been used in phytoremediation of soil contaminated with phenanthrene and endosulfan sulfate . In particular, waxy corn was reported to be more tolerant to phenanthrene, anthracene, fluorene and fluoranthene than sweet corn (Somtrakoon and Chouychai, 2013), making it potentially more suited to phytoremediation of soils contaminated with organic compounds.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Effect of Plant Growth Regulators on Phytoremediation of Hexachlorocyclohexane-Contaminated Soil

Chouychai¹,

Kruatrachue

Lee

2015

International Journal of Phytoremediation

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The influence of three plant growth regulators, indolebutyric acid (IBA), thidiazuron (TDZ) and gibberellic acid (GA3), either individually or in pair-wise combinations, on the ability of waxy corn plant to remove hexachlorocyclohexane (HCH) from contaminated soil was studied. Waxy corn seeds were immersed for 3 h in solutions of 1.0 mg/l IBA, 0.01 mg/l TDZ, 0.1 mg/l GA3, or a mixture of two of the growth regulators, and then inoculated in soil contaminated with 46.8 mg/kg HCH for 30 days. Pretreatment of corn seeds with the plant growth regulators did not enhance corn growth when compared with those immersed in distilled water (control), but the pretreatment enhanced HCH removal significantly. On day 30, HCH concentration in the bulk soil planted with corn seeds pretreated with GA3 or TDZ+GA3 decreased by 97.4% and 98.4%, respectively. In comparison, HCH removal in soil planted with non-pretreated control waxy corn seeds was only 35.7%. The effect of several growth regulator application methods was tested with 0.01 mg/l TDZ. The results showed that none of the methods, which ranged from seed immersion, watering in soil, or spraying on shoots, affected HCH removal from soil. However, the method of applying the growth regulators may affect corn growth. Watering the corn plant with TDZ in soil led to higher root fresh weight (2.2 g) and higher root dried weight (0.57 g) than the other treatments (0.2-1.7 g root fresh weight and 0.02-0.43 g root dried weight) on day 30. Varying the concentrations of GA3 did not affect the enhancement of corn growth and HCH removal on day 30. The results showed that plant growth regulators may have potential for use to enhance HCH phytoremediation.

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Phytotoxicity of single and combined polycyclic aromatic hydrocarbons toward economic crops

Cited by 34 publications

References 26 publications

Effects of Biochar on Container Substrate Properties and Growth of Plants—A Review

Effects of Biochar on Container Substrate Properties and Growth of Plants—A Review

The physiological effect of fluorene on Triticum aestivum, Medicago sativa, and Helianthus annus

Effect of Plant Growth Regulators on Phytoremediation of Hexachlorocyclohexane-Contaminated Soil

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