Killer yeasts inhibit the growth of the phytopathogen Moniliophthora perniciosa, the causal agent of Witches' Broom disease

Bioprospection of yeasts as biocontrol agents against phytopathogenic molds

“…The fact that the soil is a complex environment with a high microbial diversity may imply that only the microorganisms that show antagonistic mechanisms of defense and competition are able to adapt and survive in this ecosystem. The low number of antagonists isolated from the environment is not a surprise, since many other works have found similar results A B (Chanchaichaovivat et al, 2007;Cabral et al, 2009;Wang et al, 2009). Another point to be considered was the result of isolation of six yeasts of the same species (T. globosa) from different sources and sampling times in the same plant (rhizosphere soil and leaf).…”

Candida krusei and Kloeckera apis inhibit the causal agent of pineapple fusariosis, Fusarium guttiforme

“…Saprophytic yeasts are commonly observed on leaves and fruits, and some of them compete with plant pathogenic filamentous fungi for space and nutrients leading to plant protection (Saligkarias et al 2002;Reyes et al 2004). Competitive interactions have been shown to include hyperparasitism as well as the secretion of various agents such as wall degrading enzymes and killer toxins (Saligkarias et al 2002;Janisiewicz & Korsten 2002;Ahrendts & Carrillo 2004;Santos et al 2009;Cabral et al 2009). Our results indicate that the interaction between the yeasts C. krusei BT0701 and K. apis BT0703 isolated from pineapple, and F. guttiforme, the etiological agent of pineapple fusariosis, can be described as antagonistic, with hyperparasitism, mycocin production, and nutrient competition proposed as modes of actions.…”

Production of functional killer protein in batch cultures upon a shift from aerobic to anaerobic conditions

“…They have been reported in many other habitats as well (Musmanno et al, 1999;Ceccato-Antonini et al, 2004;Zarowska et al, 2004;Cabral et al, 2008). Killer yeasts are normally used in wineries.…”