HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (6) Citing Articles via Google Scholar Google Scholar Articles by Anderson, J. A. Articles by Martin, D. L. Search for Related Content PubMed Articles by Anderson, J. A. Articles by Martin, D. L. Agricola Articles by Anderson, J. A. Articles by Martin, D. L. Related Collections Turfgrass Plant and Environment Interactions Temperature Stress

TURFGRASS SCIENCE

Longer Exposure Durations Increase Freeze Damage to Turf Bermudagrasses

^a Dep. of Horticulture and Landscape Architecture, Oklahoma State Univ., Stillwater, OK 74078
^b Dep. of Plant and Soil Sciences, Oklahoma State Univ., Stillwater, OK 74078

^* Corresponding author (jander{at}okstate.edu)

Bermudagrasses, Cynodon sp., are susceptible to winter injury in the transition zone for warm- and cool-season turfgrasses. Our objectives were to determine relative freeze tolerance of recently released and standard cultivars using laboratory-based methodology, and to determine the effect of extended exposure duration on survival. Plants were clonally propagated, then established and acclimated in growth chambers before exposure to a range of temperatures in a freeze chamber. ‘Tifway’ and ‘TifSport’ (-7.9°C) were significantly hardier than ‘Princess’ (-6.9°C), but less freeze tolerant than ‘U-3’ (-8.9°C), ‘Patriot’ (-9.7°C), and ‘Midlawn’ (-10.3°C). Riviera (-8.3°C) was significantly hardier than Princess, but less freeze tolerant than Patriot and Midlawn. In a second set of experiments, acclimated plants were held at constant, subfreezing temperatures for various periods of time in a refrigerated bath. Survival of U-3 and Riviera decreased to 25% or less when exposed to -7.0°C for 2 or 5 d, compared with 100 and 83% survival, respectively, when plants were removed from the bath immediately after equilibrating at -7.0°C. Princess exhibited 89% survival when removed immediately after equilibrating at -5.4°C, but survival after 2, 24, and 72 h was 67, 30, and 11%, respectively. Although minimum exposure temperature is a primary determinant of survival, freeze damage to turf bermudagrasses increased as exposure duration increased.

Abbreviations: T_mid, midpoint of survival-temperature response curve

This article has been cited by other articles:

				X. Zhang, K. Wang, and E. H. Ervin Bermudagrass Freezing Tolerance Associated with Abscisic Acid Metabolism and Dehydrin Expression during Cold Acclimation J. Amer. Soc. Hort. Sci., July 1, 2008; 133(4): 542 - 550. [Abstract] [Full Text] [PDF]

				A. J. Patton and Z. J. Reicher Zoysiagrass Species and Genotypes Differ in Their Winter Injury and Freeze Tolerance Crop Sci., July 30, 2007; 47(4): 1619 - 1627. [Abstract] [Full Text] [PDF]

				X. Zhang, E. H. Ervin, and A. J. LaBranche Metabolic Defense Responses of Seeded Bermudagrass during Acclimation to Freezing Stress Crop Sci., November 21, 2006; 46(6): 2598 - 2605. [Abstract] [Full Text] [PDF]

				G. C. Munshaw, E. H. Ervin, C. Shang, S. D. Askew, X. Zhang, and R. W. Lemus Influence of Late-Season Iron, Nitrogen, and Seaweed Extract on Fall Color Retention and Cold Tolerance of Four Bermudagrass Cultivars Crop Sci., January 24, 2006; 46(1): 273 - 283. [Abstract] [Full Text] [PDF]