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Science 22 April 1977:
Vol. 196. no. 4288, pp. 434 - 436
DOI: 10.1126/science.196.4288.434
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Articles

Chemotaxis of Rhizobium spp. to a Glycoprotein Produced by Birdsfoot Trefoil Roots

WILLIAM W. CURRIER 1 and GARY A. STROBEL 1

1 Department of Plant Pathology, Montana State University, Bozeman 59715

Rhizobium spp. show chemotaxis to plant root exudates. A glycoprotein has been isolated from the root exudates of birdsfoot trefoil, Lotus corniculatus, which, at micromolar concentrations, attracts six strains of rhizobia. This glycoprotein has been given the trivial name trefoil chemotactin and contains approximately twice as much protein as carbohydrate. Gel filtration of trefoil chemotactin on a Bio-Gel A-1.5m column gave a molecular weight of approximately 60,000. Trefoil chemotactin represents a new class of chemoattractants for bacteria.

Submitted on June 1, 1976
Revised on November 2, 1976

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Science. ISSN 0036-8075 (print), 1095-9203 (online)