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Título: | An Improved Growth Medium to Assess Mycelial Compatibility Groups in Sclerotium rolfsii |
Autor: | Remesal, Efrén CSIC; Navas Cortés, Juan Antonio | Fecha de publicación: | may-2012 | Editor: | Blackwell Publishing | Citación: | Journal of Phytopathology 160(5): 237-242 (2012) | Resumen: | Mycelial compatibility is assayed mainly by pairing mycelial plugs of field isolates on Petri dishes with agar media. Although methodologically simple, mycelial compatibility testing requires an artificial growth medium that permits the identification of compatible and incompatible interactions. In this work, several growth media were studied to assess consistently mycelial interactions between Sclerotium rolfsii isolates. A modification of Patterson's medium with an increment of 25% glucose from the original concentration at a rate of 23.4g/l and amended with 180μl/l of red food colouring was the most effective combination for enhancing the size, density and distinctiveness of the aversion zone between incompatible isolates. This medium allowed the unequivocal identification of compatible and incompatible reactions of a set of five S. rolfsii isolates, which could be determined quickly after 5days of incubation in the dark at 25°C. This new formulation improved significantly and consistently the assessment of the aversion zone reaction that was visible as a red line on the colony reverse as compared to that assessed using previous media formulations, for which the visualization of aversion zones was scarcely discernible. The utility of the improved growth medium was validated by microscopic observations of the contact area of hyphal pairings between isolates of S. rolfsii in microscope slide cultures. © 2012 Blackwell Verlag GmbH. | URI: | http://hdl.handle.net/10261/84646 | DOI: | 10.1111/j.1439-0434.2012.01893.x | Identificadores: | doi: 10.1111/j.1439-0434.2012.01893.x issn: 0931-1785 e-issn: 1439-0434 |
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