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- W2000327982 abstract "Pentachloronitrobenzene (PCNB) is a fungicide belonging to the organochlorine family and used extensively in agriculture for crop production. Many studies have implied that PCNB has become an environmental concern due to its widespread contamination in eco-systems. However, whether PCNB is bioaccumulated, degraded and phytotoxic in plants is poorly understood. In this study, several alfalfa ( Medicago sativa ) cultivars were grown in soil with PCNB to investigate their absorption and catabolism, including PCNB residues in the soil and PCNB-induced toxic responses in plants. Alfalfa plants varied widely in their ability to accumulate and degrade PCNB. The degradation rate of PCNB was 66.26–77.68% after alfalfa growth in the soils for 20 d, while the rates in the control (soil without alfalfa) were only 48.42%. Moreover, concentrations of PCNB residues in the rhizosphere soil were significantly higher than those in the non-rhizosphere soils. Alfalfa exposed to 10 mg kg −1 PCNB showed inhibited growth and oxidative damage, but the effects of PCNB on the cultivars differed significantly, indicating that the alfalfa cultivars have different tolerance to PCNB. Activities of invertase (INV), urease (URE), polyphenol oxidase (PPO), alkaline phosphatase (ALP) and acid phosphatase (ACP) were assayed in the treated soils and showed that the enzyme activities were altered after PCNB exposure. The URE, PPO, ALP and ACP activities were increased in soil following the planting of alfalfa. The objective of the study was to analyze the potential of different cultivars of alfalfa to accumulate and degrade PCNB from the contaminated soil. ► Medicago sativa was able to accumulate pentachloronitrobenzene. ► M. sativa can degradate pentachloronitrobenzene. ► Overload of pentachloronitrobenzene triggered generation of reactive oxygen species. ► Several enzymes in soil differentially responded to pentachloronitrobenzene." @default.
- W2000327982 created "2016-06-24" @default.
- W2000327982 creator A5030012375 @default.
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- W2000327982 date "2013-04-01" @default.
- W2000327982 modified "2023-09-24" @default.
- W2000327982 title "Bioaccumulation and degradation of pentachloronitrobenzene in Medicago sativa" @default.
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- W2000327982 doi "https://doi.org/10.1016/j.jenvman.2013.02.004" @default.
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