Abstract
Yellow Sigatoka that is caused by Pseudocercospora musae is an important banana disease. The aim of this study was to elucidate the infection process of P. musae in banana leaves by scanning electron microscopy. Leaf samples were inoculated on the abaxial surface with P. musae and then analysed at 12, 24, 36, 48, 72, 96, 120, 144, and 168 h post inoculation (hpi) and at 36 and 50 days post inoculation (dpi). The conidia were found to be germinated between 24 and 36 hpi and penetrated through the stomata between 96 and 120 hpi, or more generally from 144 hpi. P. musae colonized the spongy parenchyma at 36 dpi and the palisade parenchyma at 50 dpi. Sporulation occurred at 50 dpi on the adaxial surface of leaves through the emergence of conidia on conidiophores through the stomata. Considering the importance of yellow Sigatoka in banana production, our results provide a better understanding of the life cycle of the fungus for treatment processes.
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The authors acknowledge the National Council for Scientific and Technological Development (CNPq) for a PhD scholarship to the first author and a productivity grant to the second and last authors; the Higher Education Personnel Coordination (CAPES); the Foundation for Research Support of the State of Minas Gerais (FAPEMIG); the Federal University of Lavras (UFLA) for financing the research; and the Laboratory of Electron Microscopy and Ultrastructural Analysis of UFLA for their technical support.
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Freitas, A.S., Pozza, E.A., Moreira, S.I. et al. Infection process of Pseudocercospora musae on banana leaf. Phytoparasitica 45, 317–324 (2017). https://doi.org/10.1007/s12600-017-0596-8
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DOI: https://doi.org/10.1007/s12600-017-0596-8