Influence of Industrial Wastewater in Douala City on Growth, Chlorophyll and Cadmium Levels of Vigna unguiculata of Economic Importance
Ecology and Evolutionary Biology
Volume 2, Issue 5, October 2017, Pages: 87-95
Received: Aug. 22, 2017; Accepted: Sep. 5, 2017; Published: Oct. 12, 2017
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Authors
Priso Richard Jules, Departement of Botany, Faculty of Science, University of Douala, Douala, Cameroun
Promesse-ssie Mpahmadje Yves, Departement of Botany, Faculty of Science, University of Douala, Douala, Cameroun
Biye Elvire Hortense, Departement of Botany, Faculty of Science, University of Yaounde I, Yaounde, Cameroun
Idole Olenguena Florentine Aimée, Departement of Botany, Faculty of Science, University of Douala, Douala, Cameroun
Taffouo Victor Desiré, Departement of Botany, Faculty of Science, University of Douala, Douala, Cameroun
Din Ndongo, Departement of Botany, Faculty of Science, University of Douala, Douala, Cameroun
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Abstract
Over the world, biodiversity conservation issues related to environmental protection are vital. Douala is one of the cities where water pollution is important. Thus, a comparative study has been carried out on some growth parameters (germination, leaf surfaces, length of stem, number of leaves), chlorophyll and cadmium contents in leaves of Vigna unguiculata grown at the vicinity of three polluted water discharged sites (Azur, Industrial Zone of Bonaberi and Abattoir of Bonendale) and a non-polluted site (control). The methodology consisted of sowing cowpea in both polluted and unpolluted sites and then the growth parameters were taken every two days for six weeks during which chlorophyll in the leaves was measured after thirty days. Moreover, the degree of pollution of waste water was analyzed in the laboratory based on physicochemical parameters. The results show that plant growth is abnormal in contaminated sites (Industrial Zone of Bonaberi, Azur and Abattoir of Bonendale and the average chlorophyll (a + b) of the leaves is 36.32 for the control and 11.23; 5.26; 17.42 respectively for polluted sites (Azur, Industrial Zone of Bonabéri and Abattoir of Bonendale). These values are significantly different. Plants in the control site concentrate less Cadmium than those in polluted sites. The Cadmium maximum absorption is observed in a site located in the Industrial Zone of Bonaberi with nearly six times the value of the control.
Keywords
Control, Environmental Pollution, Germination, Industrial City, Littoral Zone, Plant Leaves, Polluted Water
To cite this article
Priso Richard Jules, Promesse-ssie Mpahmadje Yves, Biye Elvire Hortense, Idole Olenguena Florentine Aimée, Taffouo Victor Desiré, Din Ndongo, Influence of Industrial Wastewater in Douala City on Growth, Chlorophyll and Cadmium Levels of Vigna unguiculata of Economic Importance, Ecology and Evolutionary Biology. Vol. 2, No. 5, 2017, pp. 87-95. doi: 10.11648/j.eeb.20170205.13
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Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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