Title: Modelling potential impacts of climate change on the geospatial distribution of phytopathogenic telluric fungi

Authors: Ezziyyani Mohammed; Hamdache Ahlem; Asraoui Meryem; Requena Maria Emilia; Egea-Gilabert Catalina; Candela Castillo Maria Emilia

Addresses: Polydisciplinary Faculty of Larache, Department of Life Sciences, Abdelmalek Essaâdi University, 745 Poste Principale, 92004 Larache, Morocco ' Faculty of Sciences of Tetouan, Department of Biology, Abdelmalek Essaâdi University, Mhannech II, 93002, Morocco ' Faculty of Sciences and Techniques of Settat, Hassan Premier University, Route de Casablanca Km 3,5 BP 539, Morocco ' Faculty of Biology, Department of Plant Biology, University of Murcia, Campus de Espinardo, 30100, Murcia, Spain ' Department of Science and Agrarian Technology, Agronomic Engineering, Polytechnic University of Cartagena, Campus Alfonso XIII-30203, Cartagena, Spain ' Faculty of Biology, Department of Plant Biology, University of Murcia, Campus de Espinardo, 30100, Murcia, Spain

Abstract: A very likely consequence of global warming would be a change in the range of some phytopathogens such as Phytophthora capsici, Rhizoctonia solani and Fusarium oxysporum certain micro-organisms to have a distribution limited by temperature. In this study, in vitro we focused on the mean rate of mycelial growth as a function of the time (Vmax = d/t) of the three phytopathogens, at three different temperatures (20, 25 and 30°C) and we also used a series of agrocli-matic indices. The results show that F. oxysporum and R. solani have a very limited distribution at 22 and 30°C (Vmax ≈ 10 mm) for 72h; however P. capsici showed a Vmax ≈ 20 mm for 72h the pathogenicity testing made by artificial inoculation of pepper seedlings shows that P. capsici is very aggressive at 30°C, F. oxysporum showed virulence only at 25°C but R. solani lost all virulence between 22 and 30°C.

Keywords: climate change; temperature; pathogenicity; telluric phytopathogenic fungi; virulence; Phytophthora capsici; Rhizoc-tonia solani and Fusarium oxysporum; geospatial distribution.

DOI: 10.1504/IJSAMI.2019.101679

International Journal of Sustainable Agricultural Management and Informatics, 2019 Vol.5 No.2/3, pp.158 - 167

Received: 15 Nov 2018
Accepted: 07 Apr 2019
Published online: 20 Aug 2019 *

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