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| Web URL(s): | https://archive.lib.msu.edu/tic/its/articles/2013jou437.pdf
Last checked: 07/06/2015
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Zhang, Xunzhong;
Ervin, E. H.;
Schmidt, R. E. |
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| Author Affiliation: | Department of Crop and Soil Environmental Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA |
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| Title: | Antioxidant enzyme and photosynthesis responses to cold acclimation in two zoysiagrass cultivars |
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| Section: | Physiology and stress physiology
Other records with the "Physiology and stress physiology" Section
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| Meeting Info.: | Beijing, China: July 14-19, 2013 |
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| Source: | International Turfgrass Society Research Journal. Vol. 12, 2013, p. 437-443. |
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| Publishing Information: | Madison, Wisconsin: International Turfgrass Society |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Abscisic acid; Antioxidants; Ascorbate peroxidase; Cold acclimation; Cold resistance; Enzyme activity; Hydrogen peroxide; Lipid peroxidation; Photosynthesis; Zoysia japonica
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| Cultivar Names: | Meyer; Cavalier |
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| Abstract/Contents: | "Zoysiagrass (Zoysia spp.), a warm-season turfgrass genus, is subject to freezing damage in the U.S. transition zone and other similar climate regions, so it is important to attempt to understand mechanisms of cold acclimation and subsequent effects on freezing tolerance. This study was designed to investigate changes in zoysiagrass leaf antioxidant enzyme activity, abscisic acid (ABA) content, hydrogen peroxide (H2O2) content, and photosynthesis during zoysiagrass cold acclimation. Two zoysiagrass cultivars ('Meyer', cold tolerant; 'Cavalier', relatively cold sensitive) were subjected to cold acclimation (8°C day/4°C night) and a photosynthetically active radiation (PAR) of 250 μmol m-2 s-1 over a 10-h photoperiod for 21 d in a growth chamber. Meyer had lower levels of cell membrane lipid peroxidation and greater overall freezing tolerance (LT50 = -14.2 °C) than Cavalier (LT50 = -6.8 °C). Stolon superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) activities declined from 0 to 7 d and then increased from 7 to 21 d of cold acclimation. Meyer had higher SOD and CAT activities relative to Cavalier during cold acclimation. Leaf ABA and H2O2 contents increased rapidly during early stage of cold acclimation (3 d) and may serve as signals for inducing antioxidant responses. Leaf net photosynthesis (Pn) and stomatal conductance dropped more rapidly in Meyer than Cavalier at 1 d of cold acclimation. The results suggest that rapid declines in Pn and stomatal conductance, along with increases in ABA and H2O2, during early stage of cold acclimation may trigger a cold-protective antioxidant response. Our results indicate the zoysiagrasses with greater upregulation of ABA and subsequent SOD and CAT activities during cold acclimation should have greater freezing tolerance." |
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| Language: | English |
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| References: | 40 |
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| Note: | Graphs
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Zhang, X., E. H. Ervin, and R. E. Schmidt. 2013. Antioxidant enzyme and photosynthesis responses to cold acclimation in two zoysiagrass cultivars. Int. Turfgrass Soc. Res. J. 12:p. 437-443. |
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| Web URL(s):
https://archive.lib.msu.edu/tic/its/articles/2013jou437.pdf
Last checked: 07/06/2015
Requires: PDF Reader |
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MSU catalog number: b2394179 |
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