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| Publication Type:
| Refereed |
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| Author(s): | Sage, Rowan F.;
Bearcy, Robert W. |
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| Author Affiliation: | Dept. of Botany, University of California, Davis, CA. |
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| Title: | The Nitrogen Use Efficiency of C3 and C4 Plants: II. Leaf Nitrogen Effects on the Gas Exchange Characteristics of Chenopodium album (L.) and Amaranthus retroflexus (L.) |
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| Source: | Plant Physiology. Vol. 84, No. 3, July 1987, p. 959-963. |
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| Publishing Information: | Lancaster, PA: American Society of Plant Physiologists |
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| Keywords: | TIC Keywords: Nitrogen; Efficiency; Gas exchange; Chenopodium album; Amaranthus
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| Abstract/Contents: | "The effect of leaf nitrogen (N) on the phytosynthetic capacity and the light and temperature response of photosynthesis was studied in the ecologically similar annuals Chenopodium album (C3) and Amaranthus retroflexus (C4). Photosynthesis was linearly dependent on leaf N per unit area (Na) in both species. A. retroflexus exhibited a greater dependence of photosynthesis on Na, than C. album and at any given Na, it has a greater light saturated photosynthesis rate than C. album. The difference between the species became larger as Na increased. These results demonastrate a greater photosynthetic N use efficiency in A. retroflexus than C. album. However, at a given applied N level, C. album allocated more N to a unit of leaf area so that photosynthetic rates were similar in the two species. Leaf conductance to water vapor increased linearly with Na in both species, but at a given photosynthetic rate, leaf conductance was higher in C. album. Thus, A. retroflexusr had a greater water use efficiency than C. album. Water use efficiency was independent of leaf N in C. album, but declined with decreasing N in A. retroflexus." |
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| Language: | English |
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| References: | 30 |
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| See Also: | See also part 1, "The nitrogen use efficiency of C3 and C4 plants: I. Leaf nitrogen, growth, and biomass partitioning in Chenopodium album (L.) and Amaranthus retroflex (L.)," 84(3) July 1987, p. 954-958, R=10706. R=10706
See also part 3, "The nitrogen use efficiency of C3 and C4 plants: III. Leaf nitrogen effects on the activity of carboxylating enzymes in Chenopodium album (L.) and Amaranthus retroflexus (L.) 85(2) October 1987, p. 355-359, R=11192. R=11192 |
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| Note: | Figures |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Sage, R. F., and R. W. Bearcy. 1987. The Nitrogen Use Efficiency of C3 and C4 Plants: II. Leaf Nitrogen Effects on the Gas Exchange Characteristics of Chenopodium album (L.) and Amaranthus retroflexus (L.). Plant Physiol. 84(3):p. 959-963. |
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