One of the bacterium capable of producing substances that inhibit the development of pathogenic fungi is Pseudomonas fluorescens. These bacteria are characterized by producing a pigment that dissolves in the medium and when illuminated with ultraviolet light, produce florescence. This characteristic permits the detection of this bacteria species easily. As you can see in the images, P. fluorescens cultures are very bright, and Leyla has even planted bacteria written with the name of our project.
It has been ascertained that there exists other bacteria species which have the capacity to inhibit the breeding of pathogenic fungi, but the advantage of P. fluorescens is that it is a very common microorganism on the ground and in water, and on the skin of amphibians.
Dr. Leyla Davis has been analyzing samples taken from the field of skin of the few surviving common toads in Peñalara, and she has seen as many adults as larvae from those last middle survivors have naturally occurring luminescent bacteria among their microbiota. This is a great opportunity to apply “bio-augmentation” treatment with beneficial microorganisms. Leyla has been cultivating mixed microorganisms in order to be able to give the toads a bacterial coating of their own, not cultivated from other strains, and increase the amount of P. fluorescens on the skin.
Existen otras especies de bacterias cuya capacidad para inhibir el crecimiento del hongo patógeno ha sido comprobada, pero la ventaja de P. fluorescens es que es un microorganismo muy común en el suelo y el agua, e incluso en la piel de los anfibios.