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| Publication Type:
| Refereed |
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| Author(s): | Sage, Rowan F.;
Pearcy, 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: I. Leaf Nitrogen, Growth, and Biomass Partitioning in Chenopodium album (L.) and Amaranthus retroflexus (L.) |
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| Source: | Plant Physiology. Vol. 84, No. 3, July 1987, p. 954-958. |
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| Publishing Information: | Lancaster, PA: American Society of Plant Physiologists |
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| Keywords: | TIC Keywords: Nitrogen; Growth; Chenopodium album; Amaranthus
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| Abstract/Contents: | "The effect of applied nitrogen (N) on the growth, leaf expansion rate, biomass partitioning and leaf N levels of Chenopodium album (C3) and Amaranthus retroflecus (C4) were investigated. At a given applied N level, C. album had 50% greater leaf N per unit area (Na) than A. retroflexus. Nitrate accumulated at lower Na in A. retroflexus than C. album. A. retroflexus was more productive than C. album a high N, but C. album was more productive at low N. At high applied N. nitrogen use efficiency (NUE), expressed either as net assimilation rate (NAR) per unit N or relative growth rate per unit N, was greater in A. retroflexus than C. album. However, at low applid N, C. album had a greater NUE on both an NAR and growth basis than A. retroflexus. The leaf area partitioning coefficient was similar in the species at high N, but was greater in A. retroflexus than C. album by contrast, leaf area partitioning declined to a greater degree with declining N than it did in A. retroflexus so that leaf N did not decline as much. Consequently, low N C. album plants did not lose leaf area to necrosis and had a greater NAR and NUE at low applied N than A. retroflexus." |
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| Language: | English |
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| References: | 28 |
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| See Also: | See also part 2, "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.)," 84(3) July 1987, p. 959-963, R=10707. R=10707 |
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| Note: | Figures
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Sage, R. F., and R. W. Pearcy. 1987. The Nitrogen Use Efficiency of C3 and C4 Plants: I. Leaf Nitrogen, Growth, and Biomass Partitioning in Chenopodium album (L.) and Amaranthus retroflexus (L.). Plant Physiol. 84(3):p. 954-958. |
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