Full TGIF Record # 62771
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Gagne, R. A.; Ebdon, J. S.; Manley, R. C.
Author Affiliation:University of Massachusetts and the University of Maine
Title:Relationship between turfgrass performance and low temperature tolerance in perennial ryegrass
Section:Turfgrass science
Other records with the "Turfgrass science" Section
Meeting Info.:Salt Lake City, UT: October 31 - November 4, 1999
Source:1999 Annual Meeting Abstracts [ASA/CSSA/SSSA]. Vol. 91, 1999, p. 122.
# of Pages:1
Publishing Information:[Madison, WI]: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America
Keywords:TIC Keywords: Performance; Temperatures; Cold resistance; Cultivar evaluation; Lolium perenne; Freezing; Threshold values
Abstract/Contents:"Turf losses from freeze-stress injury results in costly re-establishment. The objectives of this research were to compare critical freezing temperature thresholds of ten cultivars of perennial ryegrass (Lolium perenne L.) representing contrasting turfgrass quality types (5-high and 5-low performance cultivars). The criteria for cultivar selection was based on the relative ranking (top and bottom five) from a National Turfgrass Evaluation Program trial conducted at the Maine (Orono) location (the northern test site location in New England). Ten freeze-stress temperatures and a non-frozen control were evaluated. Both acclimated (AC) and non-acclimated (NA) tissues were evaluated. Low-temperature tolerance was assessed using whole-plant, freeze-shock survival and electrolyte leakage (EL) methods. Lethal killing temperatures (LT₅₀, derived from fitted EL and survival curves) were determined. The high-performance (HIGH) cultivars were able to tolerate significantly lower freeze-stress temperatures indicated by less leakage and superior whole-plant survival compared to low-performance (LOW) cultivars. Based on survival, LT ₅₀^D[H^D[I^D[G^D[H ranged from -9.3 to -14.7°C, and LT₅₀^D[L^D[O^D[W ranged from -3.0 to -11.9°C. Based on EL, LT₅₀^D[H^D[I^D[G^D[H ranged from -3.4 to -6.7°C, and LT₅₀^D[L^D[O^D[W ranged from -0.5 to -5.6°C. Slope estimates from EL cuves indicated that significantly smaller slopes (lower mortality rates) were detected with AC tissue (compared with NA) and with HIGH-cultivars (compared with LOW-cultivars). These results underscore the importance of selecting low-temperature tolerant perennial ryegrass because superior low-temperature survival equates to superior turfgrass performance in adapting to northern New England."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gagne, R. A., J. S. Ebdon, and R. C. Manley. 1999. Relationship between turfgrass performance and low temperature tolerance in perennial ryegrass. Annu. Meet. Abstr. 91:p. 122.
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MSU catalog number: S 1 .A58
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