Related Experiment Video
Updated: Aug 8, 2026

An Improved Chemotaxis Assay for the Rapid Identification of Rhizobacterial Chemoattractants in Root Exudates
Published on: March 25, 2022
Chemotaxis of Rhizobium spp. to Plant Root Exudates
1Department of Plant Pathology, Montana State University, Bozeman, Montana 59715.
Abstract:
Rhizobium spp. show chemotaxis to plant root exudates. Both legumes and non-legume root exudates attract the different rhizobia studied. However, the bacteria show a differential response in that they are attracted to the root exudates of some plants and show no attraction toward others. An example of negative chemotaxis was also observed. The trefoil strain of Rhizobium shows chemotaxis which is qualitatively different from that observed in other bacteria in that simple sugars, di-and trisaccharides, dextrans, and amino acids do not attract this bacterium.
Related Concept Videos
Chemotaxis in E. coli
Chemotaxis and Direction of Cell Migration
Microbe-Plant Interactions
Water and Mineral Acquisition
The Roles of Bacteria and Fungi in Plant Nutrition

