Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 26:1250-1251 (1986)
© 1986 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Screening Sericea Lespedeza for Aluminum Tolerance1

R. E. Joost, C. S. Hoveland, E. D. Donnelly and S. L. Fales2

A procedure was developed to screen sericea lespedeza [Lespedeza cuneata (Dumont) G. Don.] germplasm for AI tolerance. Sericea seeds were germinated and maintained for 7 days in petri dishes containing either distilled water or 0.5 mM AI at pH 4.5. Aluminum tolerance, evaluated as relative radicle length (RRL), ranged from 0.26 for the sensitive ‘Interstate 76’ to 0.58 for the most tolerant sericea entry. Results from the screening procedure were correlated with relative root and herbage yields (r= 0.89*, significant at the 0.05 probability level, and 0.82*, respectively) from a field study conducted at pH 4.7 and 6.0 on an acid Altavista loamy sand (fine-loamy, mixed, thermic Aquic Hapludults). All the sericea entries evaluated were superior to alfalfa (Medicago sativa L.) in AI tolerance. Comparison of forage quality data with the AI tolerance ratings indicated that selection for improved quality in sericea had no effect on AI tolerance.

Key Words: Lespedeza cuneata • Medicago sativa L. • Subsoil acidity • Aluminum toxicity • Forage quality

1 Contribution from the Dep. of Agronomy, Univ. of Georgia, Athens, GA 30602. Part of a dissertation submitted by the senior author in partial fulfillment of the requirements for the Ph.D. degree.

2 Former graduate student (currently assistant professor, Agronomy Dep., Louisiana Agric. Exp. Stn., Louisiana State Univ., Baton Rouge, LA 70803); professor, Dep. of Agronomy, Univ. of Georgia; professor emeritus, Agronomy Dep., Auburn Univ., Auburn, AL 36849; associate professor, Agronomy Dep., The Pennsylvania State Univ., University Park, PA 16802.

Received for publication July 15, 1985.




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Environmental Quality		 The Plant Genome
Copyright © 1986 by the Crop Science Society of America.