Study of Symbiotic Pathogenic Microorganisms Associated with Phytophthora colocasiae Causal Agent of Taro Mildew (Colocasia esculenta (L.) Schott)
Plant
Volume 5, Issue 5-1, October 2017, Pages: 33-42
Received: Jul. 16, 2017; Accepted: Aug. 16, 2017; Published: Oct. 10, 2017
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Authors
Asseng Charles Carnot, Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon
Nanda Djomou Giresse Ledoux, Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon
Ebongo Lobe Emmanuel, Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon
Akono Ntonga Patrick, Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon
Mbida Jean Arthur, Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon
Ngono Ngane Annie, Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon
Ambang Zachée, Faculty of Science, Department of Plant Biology, Laboratory of Phytopathology and Microbiology, University of Yaounde, Yaounde, Cameroon
Monkam Tchamaha Fabrice, Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon
Djouokep Léonel Gautier, Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon
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Abstract
Symbiotic pathogenic microorganisms associated with P. colocasiae leading to the manifestation of taro mildew have been identified and studied. The experiment was carried out in an experimental set-up consisting of completely randomized blocks with three treatments (infection with the pure strain, with the unpurified strain and a co-infection with both strains). Isolation and purification of the microorganisms was carried out in the PDA medium and the identification on the analysis of the macroscopic and microscopic morphological characters. The results of the trapping revealed among several a single microorganism which has a high affinity with P. colocasiae, this microorganism named Vorticella is identified as the agent of the amplification of the severity of the downy mildew. Greenhouse studies of taro plants showed that the unpurified strain caused enough damage with 96.67% disease incidence and a severity of 70.18% compared to plants inoculated with pure strain which had an incidence of 40% and a severity of 10.48%. All these results show that P. colocasiae is the causal agent of the mildew of the taro in the infection and the development of the disease; it is accompanied by other microorganisms with which it forms a biofilm. In this biofilm there is a microorganism which plays a very important role in the spread of the disease and it is thanks to it that all parts of the plant are attacked.
Keywords
P. colocasiae, C. esculenta, Symbiotic Microorganisms, Vorticella
To cite this article
Asseng Charles Carnot, Nanda Djomou Giresse Ledoux, Ebongo Lobe Emmanuel, Akono Ntonga Patrick, Mbida Jean Arthur, Ngono Ngane Annie, Ambang Zachée, Monkam Tchamaha Fabrice, Djouokep Léonel Gautier, Study of Symbiotic Pathogenic Microorganisms Associated with Phytophthora colocasiae Causal Agent of Taro Mildew (Colocasia esculenta (L.) Schott), Plant. Special Issue: Phytotherapy. Vol. 5, No. 5-1, 2017, pp. 33-42. doi: 10.11648/j.plant.s.2017050501.15
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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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