Full TGIF Record # 197207
Item 1 of 1
DOI:10.21273/HORTSCI.47.1.112
Publication Type:
i
Refereed
Author(s):Hinton, Jason D.; Livingston, David P. III.; Miller, Grady L.; Peacock, Charles H.; Tuong, Tan
Author Affiliation:Hinton, Miller and Peacock: Department of Crop Science; Livingston and Tuong: U. S. Department of Agriculture and Department of Crop Science, North Carolina State University, Raleigh, NC
Title:Freeze tolerance of nine zoysiagrass cultivars using natural cold acclimation and freeze chambers
Section:Turf Management
Other records with the "Turf Management" Section
Source:HortScience. Vol. 47, No. 1, January 2012, p. 112-115.
# of Pages:4
Publishing Information:Alexandria, VA: American Society for Horticultural Science
Keywords:TIC Keywords: Cold acclimation; Cold chambers; Cold resistance; Cultivar evaluation; Lethal temperature; Spring green-up; Zoysia japonica; Zoysia japonica X Zoysia tenuifolia; Zoysia matrella
Abstract/Contents:"Winter-hardiness of zoysiagrass (Zoysia spp.) cultivars is an important attribute throughout the bogeographical transition zone; thus, the inability to withstand freezing temperatures may limit the use of these cultivars. The objective of this research was to determine the freeze tolerance (LT50) of nine zoyziagrass cultivars grown in Raleigh, NC. Four Zoysia japonica Steud. cultivars (JaMur, Palisades, Empire, and Ultimate) and five Zoysia matrella (L.) Merr. cultivars (Pristine, Zeon, Cavalier, Diamond, and Zorro) were chosen to undergo freeze testing. Cores were taken from the field in Feb. 2008, 2009, and 2010 for the winter trials and in Apr. 2008, 2009, and 2010 for the spring trials (after green-up had occured). The cores were subjected to freeze treatments of -6, -8, -10, -12, and -14°C in programmable freezers. After thawing, cores were placed in a 41/20°C greenhouse to promote green-up. Cores were rated for green-up after 4 weeks on a 1 to 9 scale. Nonlinear regression analysis was used to calculate an LT50 value for each cultivar. 'JaMur', 'Palisades', 'Empire', and 'Ultimate' were no different in the winter trials with an LT50 ranging from -9.8 to 10.2°C. Among the matrella species, 'Zeon', 'Cavalier', and 'Zorro' were no different but 'Diamond' (LT50 of -6.0°C) and 'Pristine' (LT50 of -5.7°C) had less tolerance to freezing than the other matrella cultivars (LT50 range from -9.7 to -9.8), suggesting lower ability to cold-acclimate in the field than the other cultivars. Shoot weights of cores were correlated to visual green-up ratings for each cultivar with an R2 range from 0.70 to 0.99 indicating a good relationship between the green-up ratings and shoot weights."
Language:English
References:33
Note:Tables
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hinton, J. D., D. P. III. Livingston, G. L. Miller, C. H. Peacock, and T. Tuong. 2012. Freeze tolerance of nine zoysiagrass cultivars using natural cold acclimation and freeze chambers. HortScience. 47(1):p. 112-115.
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DOI: 10.21273/HORTSCI.47.1.112
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