Localization of the insect pathogenic fungal plant symbionts Metarhizium robertsii and Metarhizium brunneum in bean and corn roots |
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| Institution: | 1. Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada;2. Federal Rural University of Rio de Janeiro, Brazil;1. Winogradsky Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences, 33, Bld. 2, Leninsky Ave., Moscow, 119071, Russian Federation;2. Department of Mycology and Algology, Faculty of Biology, Lomonosov Moscow State University, 1, Bld. 12, Leninskie Gory, Moscow, 119234, Russian Federation;3. Gause Institute of New Antibiotics, 11, Bolshaya Pirogovskaya Str., Moscow, 119021, Russian Federation;4. Department of Chemistry and Technology of Biologically Active Compounds Named After N.A. Preobrazhensky, Institute of Fine Chemical Technologies, MIREA - Russian Technological University, 78 Vernadsky Avenue, Moscow, 119454, Russian Federation;1. Department of Entomology and Acarology, “Luiz de Queiroz” College of Agriculture (ESALQ/USP), Av. Pádua Dias 11, 13418-900, Piracicaba, SP, Brazil;2. Department of Genetics, “Luiz de Queiroz” College of Agriculture (ESALQ/USP), Av. Pádua Dias 11, 13418-900, Piracicaba, SP, Brazil;3. São Paulo''s Agency for Agribusiness Technology (APTA), Rodovia SP 127, Vila Fatima, 13400-970, Piracicaba, SP, Brazil;1. Department of Genetics and Biotechnology, Faculty of Biology, National and Kapodistrian University of Athens, Panepistimiopolis, 15701, Athens, Greece;2. Department of Biosciences, College of Science, Swansea University, Singleton Park, Swansea, SA2 8PP, Wales, United Kingdom;1. WG Fermentation and Formulation of Biologicals and Chemicals, Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences, Bielefeld, Germany;2. Department of Experimental and Systems Ecology, University of Bielefeld, Bielefeld, Germany |
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| Abstract: | Metarhizium is an insect pathogenic fungus and a plant root symbiont. Here the root association patterns (rhizoplane or endophytic colonization) were analyzed in common beans (Phaseolus vulgaris) and sweet corn (Zea mays) using M. robertsii and M. brunneum under various vermiculite treatments (control, with sucrose, with an insect) at two time points of plant growth (10 and 20 days). We observed that M. brunneum and M. robertsii preferentially endophytically colonized the hypocotyl, however, greater rhizoplane colonization was observed at the regions proximal to the hypocotyl in both plants. Vermiculite amended with an infected insect resulted in greater endophytic and rhizoplane colonization at 20 days compared to 10 days, for both plants as well as for both Metarhizium species. Regardless of the vermiculite treatment, corn was preferentially colonized compared to bean. Sucrose amendment in the vermiculite and infected insect amended vermiculite only showed differences in rhizoplane colonization. The greatest root association occurred with M. brunneum with an infected insect and that in corn after 20 days. |
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| Keywords: | Metarhizium Fungus Endophyte Plant colonization |
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