Full TGIF Record # 240157
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Publication Type:
Author(s):Meyer, M. J.; Smith, M. A. L.; Knight, S. L.
Author Affiliation:University of Illinois, Urbana, IL
Title:An improved system for detecting turfgrass stress responses
Section:Cross-commodity: Stress physiology
Other records with the "Cross-commodity: Stress physiology" Section
Meeting Info.:Tulsa, Oklahoma: July 29-August 3, 1989
Source:Program and Abstracts: 86th Annual Meeting of the American Society for Horticultural Science. 1989, p. 134.
Publishing Information:[Alexandria, Virginia]: American Society for Horticultural Science
# of Pages:1
Abstract/Contents:"An objective and quantitative batch nutrient culture system was developed to assess responses of St. Augustinegrass cultivars 'Seville' (saline tolerant) and 'Floratam' (saline sensitive) to salt stress. Individual grass plugs (50/treatment) were randomized in a walk-in growth chamber, and weekly NaCl supplementation gradually increased the conductivity over a three week period to treatment levels (2.4 [control], 12.4, 22.4, 32.4 dS mt-1). Plants were sampled at the onset, and at four and eight weeks during the experiment. Microliter samples of cell sap were extracted from grass blades and measured with a vapor pressure osmometer to determine osmolarity and osmotic adjustment. Length and area of sample shoot and root systems were measured using and adaptation of video image analysis, then the samples were prepared for dry weight analysis. 'Seville' responded to increasing salt stress with uniform increases in cell osmolarity, had a more dramatic response of increased root length to salt, and overall shoot development was less stunted than for 'Floratam'. 'Floratam' did not show significant cell osmotic adjustment except at the extreme salt treatment. Image analysis area and dry weight measurements were highly positively correlated except for high salt treatments after eight weeks of continuous culture, which may indicate that dry weight partitioning is altered under prolonged saline stress. Use of this novel system maximizes assessment of turfgrass stress responses, and quantification of resistance characteristics."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Meyer, M. J., M. A. L. Smith, and S. L. Knight. 1989. An improved system for detecting turfgrass stress responses. Program and Abstracts: 86th Annual Meeting of the American Society for Horticultural Science. p. 134.
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