SSSAJ Journal of Natural Resources and Life Sciences Education
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Published in Soil Sci Soc Am J 30:177-181 (1966)
© 1966 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Exchange and Absorption of Cations by Excised Roots1

R. E. Franklin2

ABSTRACT

Barley (HORDEUM VULGARE) corn (ZEA MAYS L.), and soybeans (GLYCLINE MAX) were given pretreatments which were designed to alter the root cation-exchange capacity. The amounts of Ca and K absorbed by the excised roots after a 1 hour uptake period in 10-3N chloride solution were displaced by a series of successive rinses ranging in pH from 2 to 12. There was a significant linear correlation between uptake of both Ca and K and the exchangeable Ca and K in several of the rinses, particularly with the exchangeable ions which were not removed by the first acid rinse but which were removed with subsequent rinses. Multiple correlation coefficients for these relationships ranged from 0.79 to 0.96. The method of fractionating the adsorbed ions showed promise for studying exchange properties of plant roots.

NOTES

1 Published with permission of the Director of the Ohio Agri. Res. and Develop. Center as Journal Article No. 71-65. Presented before Div. S-2, Soil Science Society of America, Kansas City, Mo., Nov. 18, 1964. This study was supported in part by grant No. GB1101 from the National Science Foundation. The author is grateful for computer time made available by the Numerical Computation Laboratory which made it possible to perform extensive calculations and the regression analyses reported in this paper.

2 Assistant Professor, The Ohio State University and the Ohio Agr. Res. and Develop. Center.

Received for publication July 23, 1965. Accepted for publication September 28, 1965.






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Copyright © 1966 by the Soil Science Society of America.