Ho Man Leung, Ka Chun Sung, Lai Yan Woo, Wing Yin Mo, Kwai Chung Cheung, Chi Kin Au, Ken Kin Lam Yung, Wai Chin Li
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引用次数: 0
Abstract
The function of Cytochrome (CYP) P450 in plants to enhance detoxification of herbicide metabolism is well-known. However, the knowledge of gene quantification for detecting and detoxifying pollutants and other toxicants by an indigenous plant growing in a contaminated site is limited. The objective of this research is to evaluate the potential of detecting or degrading 2,3,7,8 Tetrachlorodibenzodioxin (TCDD) in soil using a native plant growing in a contaminated site via the gene expression of Cytochrome P450 monooxygenases (P450s) method. The novelty of this research is that P450s in native plants possibly acts as a bioindicator on contaminated land by increasing its gene expression levels induced by the presence of TCDD. In seedling toxicity test and cytochrome enzyme activity test, a significant difference in the root length (range of value: 580.2–799.2 mm) and enzyme activity (range of value: 31.2–82.3 nmolmin−1 g−1 total protein) of such indigenous plant was found in 10 µg/L TCDD treatment when compared to other treatments. 13- and 20-fold levels of gene expression in CYP71C1 and CYP79A61 of the plant growing in a contaminated site were found after 10 µg/L TCDD treatment. The results revealed that such indigenous plant is sensitive to the detection of such persistent organic pollutant in the field site and involves gene expression change facilitated by a plant‒microbe symbiotic association. The current findings can provide an insight to use another option for pollution monitoring using non-standard plant models.
期刊介绍:
International Journal of Environmental Research is a multidisciplinary journal concerned with all aspects of environment. In pursuit of these, environmentalist disciplines are invited to contribute their knowledge and experience. International Journal of Environmental Research publishes original research papers, research notes and reviews across the broad field of environment. These include but are not limited to environmental science, environmental engineering, environmental management and planning and environmental design, urban and regional landscape design and natural disaster management. Thus high quality research papers or reviews dealing with any aspect of environment are welcomed. Papers may be theoretical, interpretative or experimental.