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| Web URL(s): | http://a-c-s.confex.com/crops/2009am/webprogram/Paper53403.html
Last checked: 01/18/2010 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Rutledge, James;
Riecher, Zachary;
Volenec, Jeffrey;
Jiang, Yiwei |
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| Author Affiliation: | Rutledge, Volenec and Jiang: Agronomy Dept., Purdue Univ., West Lafayette, IN; Riecher: Purdue Univ., West Lafayette, IN |
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| Title: | Physiological response of rough bluegrass (Poa trivialis L.) and creeping bentgrass (Agrostis stolonifera L.) to high temperature stress |
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| Section: | Graduate student oral competition: II
Other records with the "Graduate student oral competition: II" Section
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| Meeting Info.: | Pittsburgh, PA: November 1-5, 2009 |
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| Source: | 2009 International Annual Meetings: [Abstracts][ASA-CSSA-SSSA]. 2009, p. 53403. |
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| Publishing Information: | [Madison, WI]: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Agrostis stolonifera; Growth analysis; Physiological responses; Poa trivialis; Quality evaluation; Summer dormancy; Temperature stress; Tissue testing
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| Cultivar Names: | Laser; Pulsar; L-93 |
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| Abstract/Contents: | "Roughstalk bluegrass (Poa trivialis L.) exists as both a difficult-to-control weed in cool-season turf and as a valuable overseeding species for bermudagrass (Cynodon dactylon L.) golf greens. Despite its widespread distribution, little is known of its physiology. The objective of this study was to evaluate the physiological impact of high temperature on 'Laser' and 'Pulsar' roughstalk bluegrass and 'L93' creeping bentgrass (Agrostis stolonifera L.) to identify mechanisms associated with summer dormancy of roughstalk bluegrass. The two roughstalk bluegrass cultivars were selected because they exhibited differences in tolerance of summer stress for species in previous field studies. Plots were established in August 2007 or 2008 from which 10 cm diameter samples were harvested nine times throughout the growing season of the following year. Turf quality, percent cover, shoot fresh weight, stolon fresh weight, chlorophyll content, electrolyte leakage and root viability data were collected. Additionally, stolons were individually harvested to collect morphological data. All collected tissue was later analyzed for total nonstructural carbohydrates, fructans, glucose, total protein and amino-nitrogen. There was little separation in any measurements between the two rough bluegrass cultivars, however multiple differences were observed between species. Reductions in shoot dry weight and chlorophyll as well as increased electrolyte leakage indicated elevated stress of both species in response to high temperature stress. Creeping bentgrass responded to high temperature stress by producing and maintaining more protein in leaves than roughstalk bluegrass. Alternately, roughstalk bluegrass increased stolon dry weight and protein content in response to high temperature stress. The differing physiological responses of creeping bentgrass and roughstalk bluegrass to high temperature stress suggests different mechanisms of stress tolerance and helps explain commonly observed decline in quality of roughstalk bluegrass in summer." |
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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):
Rutledge, J., Z. Riecher, J. Volenec, and Y. Jiang. 2009. Physiological response of rough bluegrass (Poa trivialis L.) and creeping bentgrass (Agrostis stolonifera L.) to high temperature stress. Int. Ann. Meet. p. 53403. |
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Last checked: 01/18/2010 |
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