Abstract

PORTELA-DUSSAN, Diana Daniela; CHAPARRO-GIRALDO, Alejandro  and  LOPEZ-PAZOS, Silvio Alejandro. Bacillus thuringiensis control of the potato soft rot Erwinia carotovora. Nova [online]. 2013, vol.11, n.20, pp.39-44. ISSN 1794-2470.

In Colombia the potato crop is the fourth in importance in the economy of the country, its production reached 300 million tons. Erwinia carotovora is a Gram-negative bacterium, facultative anaerobic which causes the soft rotting of the potato; it can potentially generate up to 100% damage in the crop, which causes large economic losses. It has been established that the bacterium Bacillus thuringiensis is able to suppress the virulence of E. caratovora because it produces N-acyl-homoserine-lactonasa, a powerful enzyme that degrades of N-acyl-homoserinolactonas, which are indispensable in the quorum-sensing mechanism of E. caratovora. This can be an important alternative for the control of the disease of the soft rotting of the potato. Considering the above, this article describes the process used by the bacterium B. thuringiensis to inhibit the activity of E. caratovora.

Keywords : Bacillus thuringiensis; Erwinia carotovora; Quorum-sensing; potato soft rot.

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