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Una cianobacterium capaz de la motilidad de la natación

J B Waterbury, J M Willey, D G Franks

Science (New York, N.Y.)

|October 4, 1985

Resumen

Los investigadores descubrieron un nuevo tipo de cianobacterias móviles en el Océano Atlántico. Esta especie de Synechococcus nada usando un mecanismo desconocido, distinto de la propulsión flagelar típica de las bacterias.

Área de la Ciencia:

Microbiología marina microbiología marina.
La investigación de las cianobacterias.
La motilidad celular es la motilidad celular.

Sus antecedentes:

Las cianobacterias son típicamente microorganismos no móviles.
La motilidad en los procariotas a menudo está mediada por los flagelos.
Comprender los nuevos mecanismos de motilidad es crucial para la ecología microbiana.

Objetivo del estudio:

Para aislar y caracterizar una cianobacterium móvil.
Para investigar el mecanismo de la motilidad de la natación en Synechococcus.
Para determinar si la motilidad es dependiente de las flagelas.

Principales métodos:

Aislamiento de cianobacterias en cultivo puro de muestras del Océano Atlántico.
Microscopía luminosa para observar la morfología y la motilidad celular.
Microscopía electrónica para la búsqueda de flagelos.
Pruebas de cizallamiento para evaluar la alteración de la motilidad.

Principales resultados:

Se aisló un cianobacterium unicelular, identificado como Synechococcus.
Las células exhibieron velocidades de natación de 25 micrómetros por segundo.
La microscopía de luz sugirió una motilidad similar a la flagela.
La microscopía electrónica no reveló flagelos.
La motilidad no fue detenida por el corte de pelo.

Conclusiones:

Se ha identificado una nueva especie móvil de Synechococcus.
Las cianobacterias emplean un mecanismo de natación no flagellar.
Se necesita más investigación para dilucidar este nuevo sistema de propulsión.

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