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| Web URL(s): | http://usgatero.msu.edu/v06/n08.pdf
Last checked: 06/08/2007
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Huang, Bingru |
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| Author Affiliation: | Professor, Department of Plant Sciences, Cook College, Rutgers University, New Brunswick, New Jersey |
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| Title: | Root carbon metabolism associated with bentgrass tolerance to heat stress |
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| Source: | USGA Turfgrass and Environmental Research Online. Vol. 6, No. 8, April 15 2007, p. [1-7]. |
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| Publishing Information: | Far Hills, NJ: United States Golf Association, Green Section |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Photosynthesis; Agrostis; Heat resistance; Soil temperature; Root growth; Respiration rate; Agrostis scabra; Root respiration; Heat adaptation; Cool season turfgrasses
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| Abstract/Contents: | "Researchers at Rutgers University investigated root growth characteristics, carbon balance, and root respiration rate in relation to root thermotolerance for two bentgrass species contrasting in heat tolerance. The overall goal of the project was to identify physiological and metabolic mechanisms controlling heat tolerance in cool-season turfgrass species, specifically bentgrass. The studys findings included: Tolerance to high temperature was compared between thermal A. scabra, adapted to warm soils in geothermal areas in Yellowstone National Park, and creeping bentgrass (A. stolonifera) by exposing roots to optimum growth temperature 20°C or supraoptimal soil temperatures in water baths in growth chambers. Root viability, growth rate, and cell membrane stability data demonstrated that roots of thermal A. scabra were more thermotolerant than creeping bentgrass. Root respiration of thermal A. scabra was less responsive to increasing soil temperatures and significantly lower than creeping bentgrass at high soil temperatures. Lower root respiration may contribute to higher root thermotolerance in thermal grass. Both ion uptake and maintenance respiratory costs were significantly lower in thermal A. scabra than in creeping bentgrass at high temperature. Root thermotolerance could be related to the capacity of tighter control respiration by lowering maintenance and ion uptake costs. Carbon investment in growth of roots exposed to high soil temperatures was higher, while that invested in respiration was significantly lower, for thermal A. scabra than for creeping bentgrass. Heat tolerance in cool-season turfgrasses could be also related to efficient carbon use and adjustment of allocation patterns between growth and respiration." |
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| Language: | English |
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| References: | 20 |
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| See Also: | Other items relating to: Summertime Blues |
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| See Also: | Other Reports from this USGA research project: 1998-32-140 |
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| Note: | Summary as abstract
Pictures, color
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Huang, B. 2007. Root carbon metabolism associated with bentgrass tolerance to heat stress. USGA Turfgrass Environ. Res. Online. 6(8):p. [1-7]. |
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| Web URL(s):
http://usgatero.msu.edu/v06/n08.pdf
Last checked: 06/08/2007
Requires: PDF Reader |
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MSU catalog number: SB 433 .A1 A65 [online] |
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