Morphological and genetic characterization of Corynespora cassiicola isolates obtained from roselle and associated weeds

Santo Ángel Ortega-Acosta, Daniel Leobardo Ochoa-Martínez, Javier Hernández-Morales, Francisco Palemón-Alberto

Abstract


Several Corynespora cassiicola isolates obtained from roselle (Hibiscus sabdariffa) and nine associated weeds to this crop were morphological and phylogenetically analyzed. The fungal isolates were divided into two groups: group one included 37 isolates obtained from H. sabdariffa and eight obtained from other host plants including Solanum lycopersicum, Chromolaena odorata, Senna alata, Eugenia oerstediana, Passiflora viridiflora, Momordica charantia, Ricinus communis and Gossypium hirsutum; in this case, the predominant colonies were gray, dense texture and polygonal in shape. Group two included two isolates obtained from H. sabdariffa and one from Hyptis suaveolens; in this group the colonies were mainly cream and pale brown, dense and round. Comparative analysis with isolates of C. cassiicola from other countries showed that group one isolates were mainly associated with those isolated from the Solanaceae family, while those from group two were related to those of the Cucurbitaceae family. To our knowledge, this is the first study on the morphological and genetic characterization of C. cassiicola in Mexico.

Keywords


Hibiscus sabdariffa; leaf spot; phylogenetic analysis

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References


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DOI: http://dx.doi.org/10.18781/R.MEX.FIT.1909-2

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