Full TGIF Record # 111891
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DOI:10.21273/HORTSCI.39.6.1465
Web URL(s):https://journals.ashs.org/hortsci/view/journals/hortsci/39/6/article-p1465.xml?rskey=20m8Rj
    Last checked: 11/19/2019
    Requires: PDF Reader
Publication Type:
i
Refereed
Author(s):Ervin, Erik H.; Zhang, Xunzhong; Fike, John H.
Author Affiliation:Ervin and Fike: Assistant professors; Chang: Research scientist,Department of Crop and Soil Environmental Sciences, Virginia Polytechnic Institute and State University, Blakcsburg, Virginia
Title:Ultraviolet-B radiation damage on kentucky bluegrass. I. Antioxidant and colorant effects
Article Series:Ultraviolet-B radiation damage on Kentucky bluegrass
Section:Turf management
Other records with the "Turf management" Section
Source:HortScience. Vol. 39, No. 6, October 2004, p. 1465-1470.
# of Pages:6
Publishing Information:Alexandria, VA: American Society for Horticultural Science
Keywords:TIC Keywords: Poa pratensis; Ultraviolet radiation; Antioxidants; Colorants; Radiation injuries; Ascorbic acid; Alpha-tocopherol; Visual evaluation
Abstract/Contents:"High ultraviolet-B (UV-B; 290-320nm wavelength) may significantly contribute to kentucky bluegrass (Poa pratensis L.) sod death at harvest and transplanting. As terrestrial UV-B levels continue to increase due to a depletion of the stratospheric ozone layer this problem may worsen. Epidermal attenuation from pigments and detoxification of reactive oxygen species by antioxidant metabolites and enzymes are involved in plant defense against oxidative stress caused by UV-B. Our objective was to determine whether the attenuation and detoxification systems in kentucky bluegrass could be artificially boosted by exogenous applications of ascorbic acid (AA), alpha-tocopherol (AT), or a colorant before exposure to high levels of UV-B. Ascobic acid , AT, and the colorant Green Lawnger (GL), were applied to plugs of mature kentucky bluegrass alone or in combination, and then subjected to artificial, continuous UV-B exposure (70 μmol·m-2·s-1); three greenhouse experiments were conducted. By 3 to 5 days after UV-B initiation, visual quality and photochemical efficiency, as measured by chlorophyll fluorescence were significantly reduced. However, in Expt. 1,AA alleviated decline of visual quality, delayed loss of photochemical efficiency, and increased recovery to the control. In Expt. 3, decreased endogenous AT and antioxidant enzyme activities were measured due to UV-B stress. Application of AA, AA + AT, or GL partially alleviated photochemical efficiency decline from 4 to 12 days after initiation of UV-B. In addition, application of the chemical treatments increased leaf tissue AT concentrations by 32% to 42%, increased SOD activity by 30% to 33%, and increased catalase activity by 37% to 59%, relative to the control as measured 10 days after UV-B initiation. Greater AT concentration and SOD and catalase activities were associated with greater visual quality under UV-B stress. The results of the studies indicate that kentucky bluegrass UV-B tolerance may be increased by supplementing its pigment and antioxidant defense systems with foliar applications of AA, AT or GL."
Language:English
References:28
See Also:See also Part 2 "Ultraviolet-B Radiation Damage on Kentucky Bluegrass II: Hormone Supplement Effects", ortScience, 39(6) October 2004, p.1471-1474 R=111895 R=111895

See also Part 3 "Ultraviolet-B radiation damage on kentucky b;uegrass. III. Cultivar effects." HortScience, 39(6) October 2004, p.1475-1477 R=111899 R=111899
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Ervin, E. H., X. Zhang, and J. H. Fike. 2004. Ultraviolet-B radiation damage on kentucky bluegrass. I. Antioxidant and colorant effects. HortScience. 39(6):p. 1465-1470.
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DOI: 10.21273/HORTSCI.39.6.1465
Web URL(s):
https://journals.ashs.org/hortsci/view/journals/hortsci/39/6/article-p1465.xml?rskey=20m8Rj
    Last checked: 11/19/2019
    Requires: PDF Reader
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MSU catalog number: SB 1 .H64
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