Involvement of outer-membrane proteins in the aggregation of Azospirillum brasilense

A study was conducted to analyze the biological factors involved in the aggregation of Azospirillum brasilense strain CD. The cells were grown under aggregation-inducing and non-aggregation-inducing environments. They were then washed by centrifugation and resuspended in a potassium phosphate buffer solution. Results indicated that outer-membrane proteins are involved in the aggregation process of cells of A brasilense.