Root response to CO2 enrichment and nitrogen supply in loblolly pine
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This paper examines how elevated CO2 and nitrogen (N) supply affect plant characteristics of loblolly pine (Pinus taeda L.) with an emphasis on root morphology. Seedlings were grown in greenhouses from seeds during one growing season at two atmospheric CO2 concentrations (375 and 710 μL L-1) and two N levels (High and Low). Root morphological characteristics were determined using a scanner and an image analysis program on a Macintosh computer. In the high N treatment, elevated CO2 increased total plant dry weight by 80% and did not modify root to shoot (R/S) dry weight ratio, and leaf and plant N concentration at the end of the growing season. In the low N treatment, elevated CO2 increased total dry weight by 60%. Plant and leaf N concentration declined and R/S ratio tended to increase. Nitrogen uptake rate on both a root length and a root dry weight basis was greater at elevated CO2 in the high N treatment and lower in the low N treatment. We argue that N stress resulting from short exposures to nutrients might help explain the lower N concentrations observed at high CO2 in other experiments; Nitrogen and CO2 levels modified root morphology. High N increased the number of secondary lateral roots per length of first order lateral root and high CO2 increased the length of secondary lateral roots per length of first order lateral root. Number and length of first order lateral roots were not modified by either treatment. Specific root length of main axis, and to a lower degree, of first order laterals, declined at high CO2, especially at high N. Basal stem diameter and first order root diameters increased at high CO2, especially at high N. Elevated CO2 increased the proportion of upper lateral roots within the root system.
- Bazzaz F A 1990 The response of natural ecosystems to the rising global CO2 levels. Annu. Rev. Ecol. Syst. 21, 167–196. CrossRef
- Boot R G A 1990 The significance of size and morphology of root systems for nutrient acquisition and competition. In Causes and Consequences of Variation in Growth Rate and Productivity of Higher Plants. Eds. HLambers, M LCambridge, HKonings and T LPons. pp 299–311. SPB Academic Publishing, The Hague, The Netherlands.
- Coleman J S, McConnaughay K D M and Bazzaz F A 1993 Elevated CO2 and plant nitrogen-use: is reduced tissue nitrogen concentration size-dependent? Oecologia 93, 195–200. CrossRef
- DelCastillo D, Acock B, Reddy V R and Acock M C 1989 Elongation and branching of roots on soybean plants in a carbondioxide-enriched aerial environment. Agron. J. 81, 692–695. CrossRef
- Drew M C and Saker L R 1975 Nutrient supply and the growth of the seminal root system in barley. J. Exp. Bot. 26, 79–90.
- Hocking P J and Meyer C P 1985 Responses of Noogoora burr (Xanthium occidentale Bertol.) to nitrogen supply and carbon dioxide enrichment. Ann. Bot. 55, 835–844.
- Knecht GN and O'Leary J W 1983 The influence of carbon dioxide on the growth, pigment, protein, carbohydrate, and mineral status of lettuce. J. Plant Nutr. 6, 301–312. CrossRef
- Kozlowski T T and Scholtes W H 1948 Growth of roots and root hairs of pine and hardwood seedlings in the Piedmont. J. For. 46, 750–754.
- Larigauderie A, Hilbert O W and Oechel W C 1988 Effect of CO2 enrichment and nitrogen availability on resource acquisition and resource allocation in a grass, Bromus mollis. Oecologia 77, 544–549. CrossRef
- Ledig F T, Bormann F H and Wenger K F 1970 The distribution of dry matter growth between shoot and roots in Loblolly pine. Bot. Gaz. 131, 349–359. CrossRef
- Lowther J R 1980 Use of a single sulfuric acid-hydrogen peroxide digest for the analysis of Pinus radiata needles. Comm. Soil Sci. Plant Anal. 11, 175–188.
- Marx D H 1977 Tree host range and world distribution of the ectomycorrhizal fungus Pisolithus tinctorius. Can. J. Microbiol. 23, 217–223. CrossRef
- Norby R J, Pastor J and Melillo J M 1986 Carbon-nitrogen interactions in CO2 enriched white oak: physiological and long-term perspectives. Tree Physiol. 2, 233–241.
- Norby R J, O'Neill E G, Hood W G and Luxmoore R J 1987 Carbon allocation, root exudation and mycorrhizal colonization of Pinus echinata seedlings grown under CO2 enrichment. Tree Physiol. 3, 203–210.
- O'Neill E G, Luxmoore R J and Norby R J 1987 Elevated atmospheric CO2 effects on seedling growth, nutrient uptake, and rhizosphere bacterial populations of Liriodendron tulipifera L. Plant and Soil 104, 3–11. CrossRef
- Pettersson R and McDonald A J S 1992 Effects of elevated carbon dioxide concentration on photosynthesis and growth of small birch plants (Betula pendula Roth.) at optimal nutrition. Plant Cell Environ. 15, 911–919. CrossRef
- Rogers H H, Peterson C M, McCrimmon J N and Cure J D 1992a Response of plant roots to elevated atmospheric carbon dioxide. Plant Cell and Environ. 15, 749–752. CrossRef
- Rogers H H, Prior S A and O'Neill E G 1992b Cotton root and rhizosphere responses to free-air CO2 enrichment. Crit. Rev. Plant Sci. 11, 251–263.
- Rogers H H, Runion G B and Krupa S V 1993 Plant responses to atmospheric CO2 enrichment with emphasis on roots and the rhizosphere. Environ. Pollut. (In press).
- Sasek T W and Strain B R 1988 Effects of carbon dioxide enrichment on the growth and morphology of kudzu (Pueraria lobata). Weed Sci. 36, 28–36.
- Sionit N, Strain B R, Hellmers H, Riechers G H and Jaeger C H 1985 Long-term atmospheric CO2 enrichment affects the growth and development of Liquidambar styraciflua and Pinus taeda seedlings. Can. J. For. Res. 15, 468–471. CrossRef
- Stulen I and denHertog J 1993 Root growth and functioning under atmospheric CO2 enrichment. Vegetatio 104/105, 99–115. CrossRef
- Thomas R B and Strain B R 1991 Root restriction as a factor in photosynthetic acclimation of cotton seedlings grown in elevated carbon dioxide. Plant Phys. 96, 627–634.
- Thomas R B, Lewis D and Strain B R 1993 Effects of leaf nutrient status on photosynthetic capacity in loblolly pine (Pinus taeda L.) seedlings grown in elevated atmospheric CO2. Tree Physiol. (submitted).
- Tissue D T, Thomas R B and Strain B R 1993 Long-term effects of elevated CO2 and nutrients on photosynthesis and Rubisco in loblolly pine seedlings. Plant Cell Environ. (In press).
- Vessey J K, Henry L T and Raper C D 1990 Nitrogen nutrition and temporal effects of enhanced carbon dioxide on soybean growth. Crop Sci. 30, 287–294. CrossRef
- Wong S C 1990 Elevated atmospheric partial pressure of CO2 and plant growth. II Nonstructural carbohydrate content in cotton plants and its effect on growth parameters. Photosyn. Res. 23, 171–180. CrossRef
- Zoon F C and VanTienderen P H 1990 A rapid quantitative measurement of root length and root branching by microcomputer image analysis. Plant and Soil 126, 301–308. CrossRef
- Root response to CO2 enrichment and nitrogen supply in loblolly pine
Plant and Soil
Volume 165, Issue 1 , pp 21-32
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- image analysis
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