PRODUCTION in vitro AND in vivo OF SEXUAL STRUCTURES OF Glomerella spp.STRAINS FROM COMMON BEAN

摘要

The occurrence of fungal diseases is one of the factors that affect common bean yield. Common bean anthracnose and scab are fungal diseases that present similar symptoms in the stem, but distinct in pods. These diseases are caused by species of the genus Colletotrichum, which the fungus C. lindemuthianum is the causal agent of anthracnose. However, in the case of scab, there are still doubts about the etiological agent of the disease. Isolates from anthracnose and scab lesions have been investigated,and Glomerella spp. (teleomorphic phase) and Colletotrichum spp. (anamorphic phase) have been obtained and carried out the morphological, cytological and molecular characterization (Barcelos et al., 2014). Sexual reproduction is one of the main mechanisms of increasing genetic variability in fungi (Leslie, 1993), so it is important to study the sexual structures of the pathogen. This work aimed to evaluate the perithecia formation of four Glomerella spp. strains in vitro and in vivo when inoculated incommon bean cultivars. This information contributes to understanding the sexual recombination in these species and can aid in the common bean breeding in order to obtain cultivars with durable resistance.