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Plant Physiology 56:300-306 (1975)
© 1975 American Society of Plant Biologists

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Articles

Studies on the Secretion of Maize Root Cap Slime

I. Some Properties of the Secreted Polymer 1

Robert E. Paull, Clarence M. Johnson and Russell L. Jones

a Department of Botany and Department of Soils and Plant Nutrition, University of California, Berkeley, California 94720

The secreted slime from root cap cells of corn (Zea mays, cv. SX-17) was studied. Production of slime by excised root tips is stimulated by the addition of 40 mM sucrose or fucose and half-strength Hoagland's solution to the incubation medium. Secreted slime was recovered from aqueous solution by precipitation with ethanol. The polymer has a molecular weight greater than 2 x 10–6 daltons and a density of 1.63 g cm–3. Protein is not present in material purified by density gradient centrifugation with cesium chloride. Fucose (39%) and galactose (30%) are the principle neutral sugars found in the purified polymer. Galacturonic and glucuronic acids, arabinose, xylose, mannose, and glucose are also present.

1 This work was supported by Grant GB 27468 from the National Science Foundation.




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Copyright © 1975 by the American Society of Plant Biologists