Comparative growth of three Paecilomyces species on natural media and the possible pathological effects of their cultural metabolites on seed germination and radicle development of six economic crops in Ghana
1 Department of Science Laboratory Technology, Accra Technical University, P. O. Box GP 561, Accra, Ghana.
2 Department of Plant and Environmental Biology, School of Biological Sciences, University of Ghana, P. O. Box LG 55 Legon, Accra, Ghana.
3 Department of Medical Microbiology, School of Biomedical and Allied Health Sciences, University of Ghana, P.O. Box KB 52, Korle-Bu, Accra, Ghana
Research Article
GSC Biological and Pharmaceutical Sciences, 2018, 04(01), 008–018
Article DOI: 10.30574/gscbps.2018.4.1.0033
Publication history:
Received on 20 April 2018; revised on 08 June 2018; accepted on 09 June 2018
Abstract:
Three Paecilomyces species from Cabi Science (UK) and P. carneus GHL 001 isolated from a local shrimps (Ghana) were tested for their radial growth characteristics on four different natural media, at temperatures of 15 °C, 18 °C, 20 °C and 25 °C using the culture plate radial method. The ability of culture metabolites of the test fungi raised in Yam Dextrose and Potato Dextrose Broths were tested on the germination capacity of six economic crops, using the conventional seed blotter test method. Radial growth of the fungal species showed similar growth pattern with optimum growth at 25 °C in most instances. The local P. carneus GH001 grew better and faster on all the media tested than P. carneus IMI133119 from the UK, underscoring the influence of environmental adaptation to physiological performance. The varietal differences in the response of the germinating seeds to the toxic metabolites can be ranked in decreasing order as follows: P. carneus IMI GHL 001 ˃ P. carneus IMI 133119 ˃ P. varioti IMI 40025 ˃ P. puntoni IMI 58415. To the best of our knowledge, this is the first report on the metabolites of P. carneus, P. puntoni and P. varioti adversely having pathological influence on germination and radicle development of cowpea, groundnut, soybean, okra, sorghum and cucumber in Ghana. Since these Paecilomyces species are used in some agricultural jurisdictions as entomopathogens for biocontrol of pests and diseases, environmental impact assessment is encouraged with the view of monitoring the soil bank for conidia of Paecilomyces which may affect the performance of crops in the field.
Keywords:
Paecilomyces species; Metabolites; Fungi; Radial growth; Economic crops
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Copyright © 2018 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0.
