Pallas, J.E. and Samish, Y.B. (1974) Photosynthetic Response of Peanut. Crop Science, 14 (3). pp. 478-482.
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Abstract
The net photosynthetic rates of nine genotypes of the cultivated peanut (Arachis hypogaea L.) grown under controlled conditions were measured at six different light intensities: 180, 255, 526, 784, 1098, and 1546 µE m−2 sec−1 (E = einsteins). All genotypes evidenced an endogenous, circadian rhythm in photosynthetic rate. No genotype photosaturated at the highest intensity used, which was slightly less than full sunlight. Genotypes differed significantly in photosynthetic rate at similar light intensities; net photosynthetic rates of several of the genotypes exceeded 50 mg dm−2 hr−1. Soybean (Glycine max (L.) Merr., cv. ‘Bragg’) and tomato (Lycopersicum esculentum L., cv. ‘Marion’), grown similarly to peanut in growth chambers, showed considerably lower photosynthetic potential and photosaturated at much lower light levels (~250 to 500 µE m−2 sec−1). The peanut's photosynthetic response can help explain its adaptation to the dissimiliar light conditions in humid, semihumid, and arid regions. Its high rate of photosynthesis at any light level indicates that it is one of the more efficient species in converting solar energy to fixed carbon. Lowering ambient oxygen concentration to 1.5% increased net photosynthetic rate 35%. No correlation between specific leaf weight and net photosynthesis of the peanut was found.
| Item Type: | Article |
|---|---|
| Additional Information: | The authors acknowledge with grateful appreciation the supply of genetic materials by Drs. D.Emery, North Carolina State University, Raleigh, N. C., and R. O. Hammonds, ARS-USDA, Tifton, Ga., and the statistical assistance of Mr.Ruel Wilson, ARS-USDA, Athens, Ga.The technical assistance of Mr.Donnie Maxey was especially helpful. |
| Uncontrolled Keywords: | Photosaturation, Circadian rhythm, Oxygen inhibition. |
| Author Affiliation: | Soil, Water and Air Sciences, Southern Region, Agricultural Research Service, USDA, in cooperation with the University of Georgia Agricultural Experiment Stations. |
| Subjects: | Crop Improvement Plant Physiology and Biochemistry > Biochemistry |
| Divisions: | Groundnut |
| Depositing User: | Mr Arbind Seth |
| Date Deposited: | 02 Jan 2013 10:53 |
| Last Modified: | 02 Jan 2013 10:53 |
| Official URL: | http://dx.doi.org/10.2135/cropsci1974.0011183X0014... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/9262 |
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