Related Experiment Video
Updated: May 5, 2026

The Barnacle Balanus improvisus as a Marine Model - Culturing and Gene Expression
Published on: August 8, 2018
Bacterial-barnacle interaction: Potential of using juncellins and antibiotics to alter structure of bacterial
S Avelin Mary1, S Vitalina Mary, D Rittschof
1Sacred Heart Marine Research Centre, St. Mary's College, 628001, Tuticorin, India.
Abstract:
In preparation for studies using natural products to probe interactions between bacterial consortia and settlement stage barnacles, we isolated 16 strains of bacteria associated with barnacles and examined: (1) effects of films of bacterial isolates on barnacle settlement, and (2) bacteriostatic effects of juncellins and standard antibiotics. Bacteria were isolated from the biofilm associated withBalanus amphitrite. On the basis of morphological and biochemical characteristics, bacteria were classified into five major groups:Aeromonas, Alcaligenes, Flavobacterium, Pseudomonas, andVibrio. Barnacle settlement was inhibited by allVibrio films and 64% of the other isolates. No film stimulated barnacle settlement. Juncellins were approximately as potent as standard antibiotics for all bacterial species tested.Vibrio spp. were most resistant to juncellins.
Related Concept Videos
Microbial Interactions: Cooperation
Antibiotic Selection
Gene Regulation in Microbial Communities: Quorum Sensing
Microbial Interactions: Mutualism
Bacterial Signaling
Microbial Interactions: Competition

