imagem_seminárioPrelecionista: Adryelle Anchieta Sousa Data: 16/11/2021, às 16h, pelo ZOOM* Orientador: Jorge Luis Badel

Bacterial dormancy is an important strategy for survival under stressful environmental conditions. Two phenotypes of bacterial dormancy have been described: persistence and viability but not culturability (VBNC). The VBNC state has been studied for more than three decades and proven to occur in more than 100 microorganisms, among which some are species pathogenic to crop plants of economic interest. Factors that can induce the activation of this mechanism include altered temperature and pH conditions as well as the presence of toxic molecules in the environment, such as copper compounds important for management of bacterial plant diseases in the field. Once the VBNC mechanism is activated, bacterial cells acquire adaptive advantages to adverse conditions, such as tolerance to antibiotics and resistance to toxic compounds remaining alive for long periods of time under stress conditions. Given the importance of VBNC, much research has been conducted on the activation of this mechanism in bacterial species of importance in medicine, veterinary and agriculture. In this seminar, aspects related to bacterial dormancy and the VBNC state will be discussed, including the factors and molecular mechanisms underlying VBNC induction. Also, some factors that can reanimate VBNC cells will be addressed with particular emphasis on the practical implications for diseases caused by bacterial plant pathogens.

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