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Web URL(s):https://www.dl.sciencesocieties.org/publications/cs/articles/41/6/1895
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Publication Type:
i
Refereed
Author(s):Qian, Y. L.; Wilhelm, S. J.; Marcum, K. B.
Author Affiliation:Qian and Wilhelm: Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO; and Marcum: Department of Plant Sciences, University of Arizona, Tucson, AZ
Title:Comparative responses of two Kentucky bluegrass cultivars to salinity stress
Section:Turfgrass science
Other records with the "Turfgrass science" Section
Source:Crop Science. Vol. 41, No. 6, November/December 2001, p. 1895-1900.
Publishing Information:Madison, WI: Crop Science Society of America
# of Pages:6
Keywords:TIC Keywords: Comparisons; Poa pratensis; Cultivar evaluation; Salinity stress; Salt tolerance; Shoot growth; Turgor; Leaf firing; Clipping weight; Root weight; Verdure; Leaf water potential; Leaf osmotic potential; Proline
Cultivar Names:Kenblue; Limousine
Abstract/Contents:"Little information is available concerning physiological responses of Kentucky bluegrass (Poa pratensis L.) (KGB) cultivars to salinity. Growth and physiological responses of 'Limousine' and 'Kenblue' KBG to a range of salinity levels were investigated. Grasses were grown in solution culture and exposed to salinity levels of 2.2, 5.2, 8.2, 11.2, and 14.2 dS m-1 for 10 wk. Though both cultivars exhibited increased leaf firing with increasing salinity, Limousine exhibited less leaf firing than Kenblue at salinity levels above 5.2 dS m-1. In addition, salinity levels that caused 25% shoot growth reduction were 3.2 dS m-1 for Kenblue and 4.7 dS m-1 for Limousine, indicating that Limousine has better salinity tolerance. Under moderate (8.2 dS m-1) salinity stress, Limousine produced ~50% more root growth than Kenblue. Water relations diverged between cultivars at 8.2 and 14.2 dS m-1, as Limousine had higher leaf water and osmotic potentials, as well as more positive turgor. While glycinebetaine was not detected in either cultivar, proline increased in leaves with increasing salinity, and was higher in Kenblue than Limousine at 8.2, 11.2, and 14.2 dS m-1. This suggests that compatible solute accumulation is not a salinity tolerance mechanism of KBG, and that proline accumulation is merely an indication of salt injury. Limousine maintained 52% lower shoot Na+, 30.4% lower Cl-, and 52% higher shoot K+/Na+ ratio than Kenblue at the highest salinity level. These results suggest that salinity tolerance in KGB is largely attributable to maintenance of higher root growth, and more positive turgor, higher K+/Na+ ratio, and less Cl- accumulation in shoots. These traits may serve as useful selection criteria in breeding efforts to develop salt tolerant KBG."
Language:English
References:22
See Also:Other items relating to: SALTT
Note:Tables
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Qian, Y. L., S. J. Wilhelm, and K. B. Marcum. 2001. Comparative responses of two Kentucky bluegrass cultivars to salinity stress. Crop Sci. 41(6):p. 1895-1900.
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https://www.dl.sciencesocieties.org/publications/cs/articles/41/6/1895
    Last checked: 05/05/2017
    Access conditions: Item is within a limited-access website
https://www.dl.sciencesocieties.org/publications/cs/pdfs/41/6/1895
    Last checked: 05/05/2017
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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