Morfología de las especies de mycosphaerella asociadas a manchas de las hojas en musa spp
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Abstract
A comparison of the morphology of the structures of Mycosphaerella species associated to Sigatoka like leaf spots in Musa spp, from samples of yellow Sigatoka (YS) and Black Sigatoka (BS) from Grand nain (AAA) of Havana, Cuba and from Gros Michel plantations from Tah Yang cooperative in Patchaburi province in Thailand with Black Sigatoka like symptoms was carried out. Samples with spots in the stages 4 and 5 of evolution according the descriptions of Brun (1958) for YS and Fouré (1984) for BS respectively were placed in humid chambers to warrant the development of the fungal structures. After, the samples were decoloured, fix in FAA, and sectioned in sections of 40µm of width. Measures and descriptions of fructifications and spores were carried out. A comparative summary of the reproductive structures of Mycosphaerella eumusae, M. fijiensis, M. musicola, as well as of the species M. minima and M. musae associated to Sigatoka leaf spots, is shown. It is concluded that all species causing leaf spots can be readily separated on the basis of the morphology of their anamorphic stages. M. minima and M. musae can be separated from the rest of the species by the morphology and dimensions of their ascospores.
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References
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