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dc.contributor.authorAkande, Babatunde Cen_US
dc.contributor.authorFatoki, Olalekan Sen_US
dc.contributor.authorOdendaal, James Pen_US
dc.contributor.authorMarnewick, Jeanine Len_US
dc.contributor.authorNdakidemi, Patrick Aloisen_US
dc.identifier.citationAkande, B., Fatoki, O., Odendaal, J. et al. Theor. Exp. Plant Physiol. (2016) 28: 255. doi:10.1007/s40626-016-0060-zen_US
dc.description.abstractA 30-day exposure time experiment was designed to investigate whether the extent of physiological impacts of trihalomethane exposure on two Solanum lycopersicum cultivars correlated with either the number of bromine or chlorine atoms in the trihalomethane molecules, focusing on biomass gain, nutrient concentration, oxidative stress, fatty acids and α-tocopherol contents in membrane lipids. The gain of biomass in tomato seedlings decreased with an increase in the degree of bromination. Concentrations of essential nutrients required for plant growth such as nitrogen, phosphorus, potassium, sulphur and boron decreased in plant dry matter that correlated with the increasing number of chlorine atoms in the trihalomethane molecules. Trihalomethane exposure resulted in an increase in oxidative stress response in both tomato cultivars with parameters such as total phenolic content, ferric reducing antioxidant power, oxygen radical absorbance capacity and the activities of antioxidant peroxidase enzymes, all correlating with an increasing number of chlorine atoms in the trihalomethane molecule; hence, oxidative damage increased with a higher degree of chlorination. However, no such correlations were observed in superoxide dismutase activity, general lipid peroxidation, α-tocopherol content and total soluble proteins. In plant membrane lipids, an increase in the saturated fat hexadecanoic acid was observed in both tomato cultivars that correlated with the degree of chlorination in the trihalomethane molecule. The increase in α-linolenic acid stress signaling correlated with an increase in the degree of chlorination in only one tomato cultivar suggesting variable tolerance between cultivars to chemical action.en_US
dc.publisherTheoretical and Experimental Plant Physiologyen_US
dc.subjectMembrane fluidityen_US
dc.subjectNutrient uptakeen_US
dc.titleThe halogen effects of disinfectant by-products on nutrient concentration, oxidative stress, fatty acids and α-tocopherol concentrations in membrane lipids of two Solanum lycopersicum cultivarsen_US
Appears in Collections:Appsc - Journal Articles (DHET subsidised)
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