Full TGIF Record # 62906
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Carrow, R. N.; Duncan, R. R.
Author Affiliation:University of Georgia
Title:Salinity tolerance mechanisms in seashore paspalum ecotypes
Section:Turfgrass science
Other records with the "Turfgrass science" Section
Meeting Info.:Salt Lake City, UT: October 31 - November 4, 1999
Source:1999 Annual Meeting Abstracts [ASA/CSSA/SSSA]. Vol. 91, 1999, p. 126.
# of Pages:1
Publishing Information:[Madison, WI]: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America
Keywords:TIC Keywords: Salt tolerance; Paspalum vaginatum; Ecotypes; Comparisons; Shoot growth; Growth rate; Root growth; Threshold values; Growth; Photosynthesis; Reflectance; Relative water content; Ions; Uptake
Abstract/Contents:"Ten seashore paspalum ecotypes (Paspalum vaginatum Swarts) were selected based on their salinity tolerance of least to highest from a previous study of 94 ecotypes, and were investigated to define the associated mechanisms under solution/sand culture in a greenhouse. Turfgrasses were grown in nutrition solution added with sea salt formula to give 6 EC levels (1.2 to 49.7dSm⁻¹). Ranges of shoot growth values were: Threshold EC (dSm⁻¹), 1.2 to 17.9; EC50% (EC for 50% growth reduction; dSm⁻¹), 28.4 to 41.7; Inherent growth rate (accumulated g DW for 58 days under control), 13.6 to 17.2. Ranges for root growth were: Threshold EC, 1.2 to 30.7; EC50%, 45.7 to >49.7; Inherent growth, 3.12 to 4.54. Ranges for crown were: Threshold EC, 1.2 to 23.1; EC50%, 49.1 to >49.7; Inherent growth, 33.3 to 45.8. For total growth, ranges were: Threshold EC, 1.2 to 20.5; EC50%, 45.8 to >49.7; Inherent growth, 51.1 to 63.7. Photosynthetic parameters (chlorophyll content and fluorescence), stress indexes based on spectral reflectance, water status (water potential, relative water content), ion uptake, and osmolytes (glycine betaine, trigonelline, sugar alcohols) were investigated and will be discussed as realted to mechanism for salinity tolerance."
Note:This item is an abstract only!
See Also:Other items relating to: SALTT
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Carrow, R. N., and R. R. Duncan. 1999. Salinity tolerance mechanisms in seashore paspalum ecotypes. Annu. Meet. Abstr. 91:p. 126.
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