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Study of Symbiotic Pathogenic Microorganisms Associated with Phytophthora colocasiae Causal Agent of Taro Mildew (Colocasia esculenta (L.) Schott)

Published in Plant (Volume 5, Issue 5-1)
Received: 16 July 2017     Accepted: 16 August 2017     Published: 10 October 2017
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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.

Published in Plant (Volume 5, Issue 5-1)

This article belongs to the Special Issue Phytotherapy

DOI 10.11648/j.plant.s.2017050501.15
Page(s) 33-42
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2017. Published by Science Publishing Group

Keywords

P. colocasiae, C. esculenta, Symbiotic Microorganisms, Vorticella

References
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    Asseng Charles Carnot, Nanda Djomou Giresse Ledoux, Ebongo Lobe Emmanuel, Akono Ntonga Patrick, Mbida Jean Arthur, et al. (2017). Study of Symbiotic Pathogenic Microorganisms Associated with Phytophthora colocasiae Causal Agent of Taro Mildew (Colocasia esculenta (L.) Schott). Plant, 5(5-1), 33-42. https://doi.org/10.11648/j.plant.s.2017050501.15

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    ACS Style

    Asseng Charles Carnot; Nanda Djomou Giresse Ledoux; Ebongo Lobe Emmanuel; Akono Ntonga Patrick; Mbida Jean Arthur, et al. Study of Symbiotic Pathogenic Microorganisms Associated with Phytophthora colocasiae Causal Agent of Taro Mildew (Colocasia esculenta (L.) Schott). Plant. 2017, 5(5-1), 33-42. doi: 10.11648/j.plant.s.2017050501.15

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    AMA Style

    Asseng Charles Carnot, Nanda Djomou Giresse Ledoux, Ebongo Lobe Emmanuel, Akono Ntonga Patrick, Mbida Jean Arthur, et al. Study of Symbiotic Pathogenic Microorganisms Associated with Phytophthora colocasiae Causal Agent of Taro Mildew (Colocasia esculenta (L.) Schott). Plant. 2017;5(5-1):33-42. doi: 10.11648/j.plant.s.2017050501.15

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  • @article{10.11648/j.plant.s.2017050501.15,
      author = {Asseng Charles Carnot and Nanda Djomou Giresse Ledoux and Ebongo Lobe Emmanuel and Akono Ntonga Patrick and Mbida Jean Arthur and Ngono Ngane Annie and Ambang Zachée and Monkam Tchamaha Fabrice and Djouokep Léonel Gautier},
      title = {Study of Symbiotic Pathogenic Microorganisms Associated with Phytophthora colocasiae Causal Agent of Taro Mildew (Colocasia esculenta (L.) Schott)},
      journal = {Plant},
      volume = {5},
      number = {5-1},
      pages = {33-42},
      doi = {10.11648/j.plant.s.2017050501.15},
      url = {https://doi.org/10.11648/j.plant.s.2017050501.15},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.plant.s.2017050501.15},
      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.},
     year = {2017}
    }
    

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    T1  - Study of Symbiotic Pathogenic Microorganisms Associated with Phytophthora colocasiae Causal Agent of Taro Mildew (Colocasia esculenta (L.) Schott)
    AU  - Asseng Charles Carnot
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    AU  - Ebongo Lobe Emmanuel
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    AU  - Monkam Tchamaha Fabrice
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    JO  - Plant
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Author Information
  • Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon

  • Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon

  • Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon

  • Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon

  • Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon

  • Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon

  • Faculty of Science, Department of Plant Biology, Laboratory of Phytopathology and Microbiology, University of Yaounde, Yaounde, Cameroon

  • Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon

  • Faculty of Science, Department of Plant Biology, Laboratory of Plant Biology and Physiology, University of Douala, Douala, Cameroon

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