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Appl Environ Microbiol. 1975 July; 30(1): 123-131
Copyright © 1975 American Society for Microbiology. All Rights Reserved.

Production of Cellulose Microfibrils by Rhizobium¹

^* Departments of Microbiology and Soil Science, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, Florida 32611

ABSTRACT

Electron microscope examination of Rhizobium spp. revealed microfibrils produced by flocculating strains but not by nonflocculating strains. The microfibrils from R. trifolii (NA30) were isolated and identified as cellulose by enzymatic, X-ray diffraction, and infrared spectral analyses. Both infective and noninfective strains of R. trifolii flocculated and produced microfibrils. More infection threads were observed in clover root hairs growing in the presence of flocs in comparison with root hairs where single bacterial cells predominated.

¹ Florida Agricultural Experiment Station Journal Series no. 5864.