Full TGIF Record # 252627
Item 1 of 1
DOI:10.1016/j.scienta.2012.02.035
Web URL(s):http://www.sciencedirect.com/science/article/pii/S0304423812001185
    Last checked: 01/05/2015
    Access conditions: Item is within a limited-access website
Publication Type:
i
Refereed
Author(s):Gao, Yang; Li, Deying; Chen, Yajun
Author Affiliation:Gao and Li: Department of Plant Sciences, North Dakota State University, Fargo, ND; Chen: Department of Landscape Horticulture, College of Horticulture, Northeast Agricultural University, Harbin, China
Title:Differentiation of carbonate, chloride, and sulfate salinity responses in tall fescue
Source:Scientia Horticulturae. Vol. 139, May 18 2012, p. 1-7.
# of Pages:7
Publishing Information:Amsterdam, Elsevier
Keywords:TIC Keywords: Comparisons; Cultivar evaluation; Effluent water use; Festuca arundinacea; Genetic resistance; Irrigation water; Osmotic stress; Physiological responses; Saline water; Salinity stress
Cultivar Names:Tar Heel II; Wolfpack
Abstract/Contents:"Managing turfgrass under salinity stress is becoming more important with the increasing use of recycled water for irrigation. Tall fescue (Festuca arundinacea Schreb.) is a cool-season turfgrass with moderate to high tolerance to salinity. The objective of this study was to compare physiological responses of tall fescue leaves to carbonate, chloride, and sulfate under iso-osmotic, iso-Na+ strength conditions to test if osmotic stress is more important than ion toxicity. Two tall fescue varieties, 'Tar Heel II' (salt tolerant) and 'Wolfpack' (salt sensitive) were seeded in plastic tubes using washed sand as growth medium with pH of 7.7 and electric conductivity (EC) of 0.04 dS m-1. Sodium chloride from 0 to 225 mM, and NaCl, Na2CO3, Na2SO4, and CaCl2 from 0 to 125 mM, were used in the study. Plant growth, leaf firing, relative water content (RWC), chlorophyll (Chl) content, quantum yield (QY), and normalized difference vegetation index (NDVI) were measured. Leaf firing occurred under an alkaline condition with pH higher than 9 as in Na2CO3, or at pH below 8 combined with high salinity (>7.5 dS m-1) as in CaCl2. At pH below 8 and EC below 7.5 dS m-1, severe physiological stress may occur without leaf firing, as in Na2SO4 and NaCl. With iso-molar concentration, NaCl had the lowest EC and highest osmotic potential, and induced less growth reduction and physiological stress compared to Na2CO3, Na2SO4, and CaCl2. Using Chl content, QY, and NDVI as indicators, the stress levels in tall fescue caused by four salts ranked Na2CO3 the most, followed by Na2SO4, and CaCl2, and least in NaCl."
Language:English
References:43
Note:Equations
Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gao, Y., D. Li, and Y. Chen. 2012. Differentiation of carbonate, chloride, and sulfate salinity responses in tall fescue. Scientia Horticulturae. 139:p. 1-7.
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DOI: 10.1016/j.scienta.2012.02.035
Web URL(s):
http://www.sciencedirect.com/science/article/pii/S0304423812001185
    Last checked: 01/05/2015
    Access conditions: Item is within a limited-access website
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