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| Web URL(s): | http://turf.rutgers.edu/research/abstracts/symposium2005.pdf#page=50
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;
Huang, Bingru |
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| Author Affiliation: | Department of Plant Biology and Pathology, Rutgers University |
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| Title: | Root respiratory characteristics associated with plant adaptation to high soil temperature for geothermal and turf-type agrostis species |
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| Section: | Poster presentations
Other records with the "Poster presentations" Section
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| Meeting Info.: | Cook College, Rutgers, NJ: January 13-14, 2005 |
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| Source: | Proceedings of the Fourteenth Annual Rutgers Turfgrass Symposium. 2005, p. 49. |
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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: Root respiration; Adaptation; Soil temperature; Carbon; Utilization; Agrostis; Agrostis scabra; Agrostis stolonifera; Root growth
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| Cultivar Names: | L-93; Penncross |
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| Abstract/Contents: | "The mechanisms that control adaption and acclimation of plants to high temperature soils are essential to our understanding of natural, agricultural and leisure environments. Respiration is a major avenue of carbohydrate loss. Shortage of assimilates due to high respiratory losses has long been proposed to be a primary factor responsible for root growth inhibition. In the current study, responses of root vitality, growth, root maximal length, total respiration rate and its components (maintenance, growth and ion uptake) to high soil temperature were evaluted in two Agrostis species: Agrostis scabra, a heat tolerant grass collected from Yellowstone National Park is adapted to high-temperatures soils, and two creeping bentgrasses (A. Palustris) cultivars, 'L-93' and 'Penncross' that differ in their heat sensitivity. The plants were studied following subjection of roots either to high temperature (37°C) or to the optimum temperature (20°C). All parameter were measured once a week for four weeks during treatment. Total root respiration increased under high temperatures in all species. The lowest increase (35%) was in the heat tolerant specie, A. Scarbra, and the highest increase (94%) was in the most sensative creeping bentgrass 'Penncross'. Total respiration increases were positively correlated to roots mortality and negatively correlated to root biomass and maximal root length. Respiration maintenance costs were lower under 20°C: 1.19, 1.12 and 1.09 mmol Co2 g-1 d-1 in A. scabra, 'L-93' and 'Penncross', respectively. Under 37°C, the maintenance costs were: 1.7, 2.29, and 2.45 mmol CO2 g-1 d-1 in A. scabra, 'L-93' and 'Penncross', respectively. Our results indicate that carbon utilization in the geothermal grasses adapted to high-temperature soils was more efficient and that carbon utilization play an important role in slow root growth and high root mortality under high soil temperatures. Heat tolerance of roots was related to the ability to control respiratory costs and increase their respiratory efficiency by lowering their maintenance costs." |
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| Language: | English |
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| References: | 0 |
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| See Also: | See also related article "Root respiratory characteristcs associated with plant adaptation to high soil temperature for geothermal and turf-type Agrostis species" Journal of Experimental Botany, 57(3) February 2006, p. 623-631 R=124348 R=124348 |
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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., and B. Huang. 2005. Root respiratory characteristics associated with plant adaptation to high soil temperature for geothermal and turf-type agrostis species. Proc. Annu. Rutgers Turfgrass Symp. p. 49. |
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| Web URL(s):
http://turf.rutgers.edu/research/abstracts/symposium2005.pdf#page=50
Last checked: 11/26/2007
Requires: PDF Reader |
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MSU catalog number: SB433 .R88 |
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