El-Sharkawy, M. and Hesketh, J. (1965) Photosynthesis among species in relation to characteristics of leaf anatomy and CO2 diffusion resistances. Crop Science, 5 (6). pp. 517-521.
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Abstract
Differences in photosynthesis of single leaves in intense light and 300 ppm COo have been observed among species (3). Three causes of such differences have been proposed (3): (a) the existence of some kind respiratory COo leakage into the intercellular air spaces and/or out of the leaf in intense light and during active photosynthesis; (b) stomatal diffusion resistances associated with lack of stomata in the top surface of some leaves; and (c) a difference between warm-climate and cool-climate species which is thought to be associated with some internal characteristic of the leaf. Each of the three causal factors depressed photoynthesis by 15 to 20 mg. CO_o dm.-ehr. -1. Many tropical grasses with none of the limitations listed above have photosynthetic rates (P) 60 to 70 mg. COt dm.-°hr.-X; deciduous tree species of the temperate zone have all three limitations and leaf P values of 10 to 20 mg. COo dm.-ehr. -1. In seeking ,note information about the three factors listed above, studies of internal anatomy of the leaf and COo diffusion resistances were undertaken using species with various combinations of the three factors. Results of these experiments are reported here.
| Item Type: | Article |
|---|---|
| Author Affiliation: | Department of Plant Breeding, University of Arizona, Tucson |
| Subjects: | Crop Improvement |
| Divisions: | Sorghum |
| Depositing User: | Sandhya Gir |
| Date Deposited: | 21 Oct 2010 08:43 |
| Last Modified: | 21 Oct 2010 10:33 |
| Official URL: | http://dx.doi.org/10.2135/cropsci1965.0011183X0005... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/232 |
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