Bioaccumulation and degradation of pentachloronitrobenzene in Medicago sativa
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 bioaccumu...
| Publicado en: | Journal of Environmental Management Vol. 119; pp. 143 - 151 |
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| Autores principales: | , |
| Formato: | Artículo |
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Academic Press Inc.
Apr2013
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=86644344&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 86644344 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 03014797 EMJ jtl: Journal of Environmental Management issn: 03014797 maglogo: N pubinfo: dt: Apr2013 vid: 119 pid: 735 pub: Academic Press Inc. artinfo: ui: 86644344 10.1016/j.jenvman.2013.02.004 ppf: 143 ppct: 8 formats: tig: atl: Bioaccumulation and degradation of pentachloronitrobenzene in Medicago sativa aug: au: Li, Ying Ying Yang, Hong affil: Jiangsu Key Laboratory of Pesticide Science, College of Science, Nanjing Agricultural University, Nanjing 210095, China Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects of Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China su: Bioaccumulation in plants Effect of fungicides on plants Quintozene Alfalfa Fungicides & the environment Biodegradable pesticides Phytotoxicity Soil pesticide content measurement sug: subj: Other Food Crops Grown Under Cover Hay Farming All Other Miscellaneous Crop Farming All other miscellaneous crop farming Farm Supplies Merchant Wholesalers Pesticide and Other Agricultural Chemical Manufacturing Agricultural chemical and other farm supplies merchant wholesalers Bioaccumulation in plants Effect of fungicides on plants Quintozene Alfalfa Fungicides & the environment Biodegradable pesticides Phytotoxicity Soil pesticide content measurement keyword: Accumulation Medicago sativa Pentachloronitrobenzene Residues Toxicity Accumulation Medicago sativa Pentachloronitrobenzene Residues Toxicity ab: 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 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. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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