Brown, J.C. and Clark, R.B. and Jones, W.E. (1977) Efficient and inefficient use of phosphorus by sorghum. Soil Science Society of America Journal, 41 (4). pp. 747-750.
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Abstract
Twelve (Sorghum bicolor L. Moench) genotypes were grown on acid-Bladen soil (pH 4.3, P stressed or Al toxic), on limed-Bladen soil (pH 5.2, Cu stressed), and on alkaline Quinlan soil (pH 7.5, Fe stressed) to determine the effect of P efficiency on use of these clements by the plants. Under P-stress or Al-toxicity conditions, the most P-efficient sorghum genotypes absorbed more 32P than the most P-inefficient lines and grew normally, while the P-inefficient plants developed P-deficiency symptoms. Under Fe-stress conditions, the most P-efficient genotypes developed Fe chlorosis, while the most P-inefficient plants remained green. Under Cu-stress conditions, one of six genotypes developed severe Cu-deficiency symptoms, characterized by the accumulation of higher P in the lower leaves, and by lower Fe and Ca in upper leaves of Cu-stressed plants as compared with Cu-sufficient plants. Thus, P efficiency in plants may be an asset when P availability limits growth, but it may be a liability when these same plants are subjected to Fe or Cu stress
| Item Type: | Article |
|---|---|
| Author Affiliation: | Plant Stress Laboratory, ARS, USDA, Beltsville, MD 20705, USA |
| Subjects: | Plant Production Crop Improvement > Genetics/Genomics Crop Improvement > Plant Breeding |
| Divisions: | Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 13 Dec 2012 05:54 |
| Last Modified: | 13 Dec 2012 05:54 |
| Official URL: | http://dx.doi.oef/10.2136/sssaj1977.03615995004100... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/9071 |
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