SSSAJ Journal of Natural Resources and Life Sciences Education
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Published in Soil Sci Soc Am J 33:632-634 (1969)
© 1969 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Influence of Culture Filtrates of Soil Fungi on the Absorption of 144Ce and 90Sr by Excised Roots1

A. A. Zwarun, R. H. Miller and R. E. Franklin2

ABSTRACT

Culture filtrates from Aspergillus niger, Aspergillus spp., and two species of Penicillium were studied for their effect on absorption of 144Ce and 90Sr by excised roots of soybean and barley. Filtrates from both species of Asperigllus and one of the Penicillium markedly decreased the absorption of 144Ce but had little effect on 90Sr. Citric acid was found in the three active filtrates while an unidentified organic acid was found in the other. The reduced absorption of 144Ce could be duplicated by citric acid at concentrations > 10-2M. Kojic, glucuronic, and 2-ketogluconic acids had no effect on absorption of 144Ce, but kojic and 2-ketogluconic acids reduced 90Sr absorption by soybean roots.

NOTES

1 Published with permission of the Director of The Ohio Agr. Res. & Devel. Center as Journal Article no. 4–69. A portion of the results were presented before Div. S-3, Soil Science Society of America, Washington, D.C., Nov. 9, 1967. The results were used by the senior author in partial fullfillment of the requirements for the M.S. degree, The Ohio State University, 1967. Supported by Public Health Service Research Grant RH 00124 from the Division of Radiological Health.

2 Former Research Associate and Associate Professors respectively, The Ohio Agr. Res. & Devel. Center, and The Ohio State University.

Received for publication February 3, 1969. Accepted for publication April 14, 1969.






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Journal of Natural Resources
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Environmental Quality		 The Plant Genome
Copyright © 1969 by the Soil Science Society of America.