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| Web URL(s): | https://turf.rutgers.edu/research/abstracts/symposium2010.pdf#page=45
Last checked: 02/06/2017
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Jespersen, David;
Huang, Bingru |
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| Author Affiliation: | Department of Plant Biology and Pathology, Rutgers University |
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| Title: | Genetic variation and physiological traits in drought tolerance for bentgrass |
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| Section: | Poster presentations
Other records with the "Poster presentations" Section
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| Meeting Info.: | New Brunswick, NJ: January 11, 2010 |
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| Source: | Proceedings of the Nineteenth Annual Rutgers Turfgrass Symposium. 2010, p. 45. |
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| Publishing Information: | New Brunswick, NJ: Center for Turfgrass Science, Rutgers, The State University of New Jersey |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Agrostis; Agrostis stolonifera; Characteristics; Comparisons; Cultivar evaluation; Drought resistance; Genetic variability; Morphological evaluation; Water conservation
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| Abstract/Contents: | "Drought is a major abiotic stress, which often leads to decline in turf health and quality in various turf grass species. Creeping bentgrass (Agrostis stolinifera), one of the widely used species on golf courses, is sensitive to drought stress. Improving drought tolerance in creeping bentgrass is critically important for water conservation on golf courses. The genetic variation is an invaluable source for selecting drought-tolerant germplasm that can persistent drought. Knowledge of physiological traits associated with drought tolerance is essential for selecting drought-tolerant germplasm through conventional breeding and biotechnology. The objectives of the study were to compare genetic variation in drought tolerance among commercial available cultivars, transgenic line, and wild species, and to determine major physiological traits linked to drought tolerance in bentgrass. Eight cultivars of creeping bentgrass, a thermal bentgrass (A. scabra) collected from Yellowstone National Park, and a transgenic bentgrass line with a gene (ipt) for increasing cytokinin synthesis were subjected to drought by withholding irrigation for 7-10 days, and assessed with several measurements which included: turf quality, normalized difference vegetation index (NDVI), leaf relative water content (RWC), leaf electrolyte leakage (LEL), leaf photochemical efficiency (Fv/Fm), root electrolyte leakage (REL) and root respiration activity. These measurements, which were then tested for correlation with each other, encompass overall turf performance, water usage, photosynthetic health, and membrane stability during drought. Using these parameters cultivars were grouped into three groups of varying drought tolerance of high, medium or low tolerance: 'Kingpin', 'L93' and 'Penncross' consistently performed poorly under drought stress; the thermal grass 'Ntas' and transgenic 'H31', and 'Declaration' and 'Pro' were most tolerant; '007', 'Tyee' and 'Shark' were intermediate. Correlation analysis showed that RWC and Fv/Fm were positively correlated to turf quality while LEL and REL were negatively correlated to turf quality under drought stress. Fv/Fm had the highest correlation coefficient with turf quality and NDVI among all parameters. While this study shows the relative performance of several cultivars the more important results are the correlation of the physiological parameters with drought tolerance. This information can be applied to improving selection techniques for breeding as well as understanding physiology mechanisms and genetic sources of drought tolerance." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Other items relating to: Disasters - Drought |
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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):
Jespersen, D., and B. Huang. 2010. Genetic variation and physiological traits in drought tolerance for bentgrass. Proc. Annu. Rutgers Turfgrass Symp. p. 45. |
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| Web URL(s):
https://turf.rutgers.edu/research/abstracts/symposium2010.pdf#page=45
Last checked: 02/06/2017
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b3696858 |
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