Brown, R.H. and Byrd, G.T. (1997) Relationships between specific leaf weight and mineral concentration among genotypes. Field Crops Research , 54 (1). pp. 19-28.
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Abstract
Physiological functions are usually expressed on a leaf area basis, whereas leaf mineral concentrations are often expressed on a dry matter (DM) basis. If specific leaf weight (SLW; g DM m-2 leaf) differs among genotypes then variability in mineral concentration may depend on the basis of expression. Data from greenhouse experiments with 10 groundnut and 10 Pennisetum glaucum genotypes and from the literature were used to examine relationships between leaf mineral concentration and SLW. Leaf ash concentration on a DM basis was negatively correlated with SLW and the correlation coefficients were significant in six of nine comparisons for the two species. In the one groundnut experiment in which mineral elements were determined, the correlations with ash were due mainly to correlations with Ca and Mg, while in P. glaucum, correlations were due mainly to K. The slope of a plot of leaf constituents per unit of leaf area against SLW for a range of genotypes is a measure of the contribution of that leaf constituent to increased SLW. From data in the literature it appears that increased SLW is due mostly to the increase in cell wall components and non-structural carbohydrates, and sometimes protein. Leaf mineral per unit of leaf area appears to be unrelated or only slightly increased with increased SLW and thus declines on a unit weight basis because of dilution by increased cell wall content or soluble carbohydrate.
| Item Type: | Article |
|---|---|
| Additional Information: | Dr S N Nigam research collection - Box No:3 |
| Uncontrolled Keywords: | Specific leaf weight (leaf weight/leaf area), Water-use efficiency, Peanut, Arachis hypogaea, Pearl millet, Pennisetum glaucum |
| Author Affiliation: | Department of Crop and Soil Sciences, University of Georgia, USA. |
| Subjects: | Crop Improvement |
| Divisions: | Chickpea Groundnut Millet Pigeonpea Sorghum |
| Depositing User: | Mr Arbind Seth |
| Date Deposited: | 28 Mar 2013 14:00 |
| Last Modified: | 28 Mar 2013 14:00 |
| Official URL: | http://dx.doi.org/10.1016/S0378-4290(96)03450-8 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/9971 |
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