Poder atrativo de leveduras isoladas de abelhas

Abstract

Yeasts are examples of microorganisms that interact with the environment through the synthesis of semiochemicals, which attribute to them an attractive power that grants the ability to interact with other organisms, even mediating interactions between them. Taking as an example the yeasts of the floral substrate, which alter the chemical composition of their habitat and release by-products such as volatile compounds, these contribute to the emission of odors from the plant, which is one of the strategies to attract pollinators, in addition, visitors Florals see volatiles as resource signals, thus reducing their foraging time, and when they come into contact with the floral substrate, they adhere to the microbial communities associated with this niche in their bodies and act as vectors. The synthesis of these volatiles by yeast can be different depending on the type ofsubstrate the yeast is on, as this depends on the availability of resources that the yeast has to grow. In this context, we investigated the attractive power of 18 yeast strains isolated from the body and intestine of bees found in the Pantanal and the Amazon. The attractiveness of insects was evaluated with experiments set up within the Federal University of Mato Grosso - Campus Cuiabá, where fly traps were prepared, which were used as attractive yeasts inoculated in YPG and YPF culture medium. In addition, an assay was carried out to evaluate the attractiveness of the ciliated protozoan Tetrahymena pyriformis. The results showed that all tested strains have the ability to attract insects, the Papiliotrema flavescens, Starmerella meliponinorum and Hanseniaspora uvarum strains were able to differentiate themselves from the other treatments according to their richness of attracted insects, the species Hanseniaspora uvarum also differed in abundance, attracting many specimens belonging to the Diptera order, and the Starmerella meliponinorum species, in addition to being attractive to many insects, also showed the potential to synthesize attractive compounds for T. pyriformis.