Full TGIF Record # 73299
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Web URL(s):https://link.springer.com/article/10.1023/A%3A1010306720328
    Last checked: 09/27/2017
    Access conditions: Item is within a limited-access website
    Notes: Guide page
Publication Type:
i
Refereed
Author(s):Derner, J. D.; Polley, H. W.; Johnson, H. B.; Tischler, C. R.
Author Affiliation:Grassland, Soil & Water Research Laboratory, USDA-ARS, Temple, Texas
Title:Root system response of C4 grass seedlings to CO2 and soil water
Source:Plant and Soil. Vol. 231, No. 1, April 2001, p. 97-104.
# of Pages:8
Publishing Information:Dordrecht, Netherlands: Kluwer Academic Publishers
Keywords:TIC Keywords: Root systems; Seedlings; Soil water; Relative water content; Carbon dioxide; Root growth; Root tips; Root length; Root weight; Grasslands; Schizachyrium scoparium; Andropogon gerardii
Abstract/Contents:"Aboveground growth of C4 plants responds more strongly to atmospheric CO2 concentration when soil water is limiting rather than abundant. Whether the same is true of root growth and morphology, however, remains to be evaluated. We investigated interactive effects of CO2 and soil water on root growth and morphology of two C4 grasses. Seedlings of the dominant C4 grasses from tallgrass prairie, Schizachyrium scoparium and Andropogon gerardii, were grown for 8 weeks in an elongated, controlled environment chamber at CO2 concentrations of 368 (ambient) and 203 (subambient) μmol mol-1. Seedlings were maintained at either high (ca. 90%) or low (ca. 50%) soil relative water holding capacity (RWC). Both root and shoot systems of C4 grass seedlings responded similarly to CO2 enrichment irrespective of whether soil water was limiting or abundant. Root growth was affected primarily by increased RWC (40-51% increases) and secondarily by higher CO2 (15-27% increases). The relative distribution of root surface area, number of root tips and length and volume of roots were significantly affected by CO2 enrichment with proportional increases of 55-61%, 39-52%, 50-55% and 52-58%, respectively, occurring in very fine (0-0.3 mm) roots. The indirect effect of CO2 enrichment on conservation of soil water in grasslands may be as important as direct photosynthetic response effects in the CO2-induced enhancement of whole-plant growth in C4 grasses."
Language:English
References:33
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Derner, J. D., H. W. Polley, H. B. Johnson, and C. R. Tischler. 2001. Root system response of C4 grass seedlings to CO2 and soil water. Plant Soil. 231(1):p. 97-104.
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Web URL(s):
https://link.springer.com/article/10.1023/A%3A1010306720328
    Last checked: 09/27/2017
    Access conditions: Item is within a limited-access website
    Notes: Guide page
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