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| Web URL(s): | http://turf.rutgers.edu/research/abstracts/symposium2006.pdf#page=43
Last checked: 11/26/2007
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Rachmilevitch, Shimon;
Lambers, Hans;
Huang, Bingru |
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| Author Affiliation: | Rachmilevitch and Huang: Department of Plant Biology and Pathology, Rutgers University; Lambers: School of Plant Science, University of Western Australia |
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| Title: | Carbon and nitrogen in relation to heat tolerance |
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| Section: | Posters
Other records with the "Posters" Section
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| Meeting Info.: | Cook College, Rutgers, NJ: January 12-13, 2006 |
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| Source: | Proceedings of the Fifteenth Annual Rutgers Turfgrass Symposium. 2006, p. 42. |
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| Publishing Information: | New Brunswick, NJ: Center for Turfgrass Science, Cook College, Rutgers, The State University of New Jersey |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Carbon; Nitrogen; Nutrient balance; Heat resistance; Assimilation; Nitrogen partitioning; Agrostis stolonifera; Agrostis scabra; Soil temperature; Root growth; Shoots
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| Abstract/Contents: | "Adjustments in carbon and nitrogen assimilation and allocation patterns may play a role in plant adaptation to environmental stresses. We studied changes in assimilation and allocation patterns of carbon and nitrogen associated with plant tolerance to high soil temperature for two Agrostis species: thermal Agrostis scabra, a species adapted to high-temperature soils in geothermal areas in Yellowstone National Park, and two cultivars of a cool-season species, A. stolonifera (creeping bentgrass) , 'L-93' and 'Penncross'. Roots of A. scabra and both A. stolonifera cultivars were exposed to soil temperatures of 37°C or 20°C, while shoots were exposed to 20°C. Net photosyntesis rate (Pn), photochemical efficiency (Fv/Fm), NO3--assimilation rate, and root variability decreased with increasing soil temperatures in both species. However, the decreases were less pronounced for A. scabra than for both A. stoloniferea cultivars. Carbon investment in growth of plants exposed to 37°C decreased more dramatically in both A. stoloifera cultivars than in A. scabra. Nitrogen allocation to shoots was greater in A. scabra than in both creeping bentgrass cultivars at 37°C soil temperature. Better tolerance of A. scabra to high soil temperature was related to more efficient carbon- and nitrogen-allocation patterns. Thermal A. scabra invested more carbon for growth of roots exposed to high soil temperatures, and more nitrogen for shoots exposed to the low temperature, as compared with both cultivars of A. stolonifera. Our results demonstrate that plant tolerance to high soil temperature could be related to efficient expenditure and adjustment of carbon- and nitrogen-allocation patterns for growth and respiration." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Rachmilevitch, S., H. Lambers, and B. Huang. 2006. Carbon and nitrogen in relation to heat tolerance. Proc. Annu. Rutgers Turfgrass Symp. p. 42. |
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| Web URL(s):
http://turf.rutgers.edu/research/abstracts/symposium2006.pdf#page=43
Last checked: 11/26/2007
Requires: PDF Reader |
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MSU catalog number: SB 433 .R88 |
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