Full TGIF Record # 62869
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Filiault, D. L.; Stier, J. C.
Author Affiliation:University of Wisconsin-Madison
Title:Photosynthetic efficiency and carbohydrate status of overwintering turfgrasses
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. 123.
# of Pages:1
Publishing Information:[Madison, WI]: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America
Keywords:TIC Keywords: Photosynthesis; Carbohydrates; Carbohydrate reserves; Winter; Cold resistance; Poa pratensis; Lolium perenne; Poa supina; Cultivar evaluation; Crown
Cultivar Names:Touchdown; SR 4200; Supranova
Abstract/Contents:"The accumulation of carbohydrates is a key process in the cold acclimation and winter survival of grasses. Since carbohydrate synthesis is driven by energy from photosynthesis, grasses that have a higher photosynthetic efficiency during hardening should be capable of producing and storing more carbohydrates. Chlorophyll fluorescence parameters, including the F^D[v:F^D[m ratio, were used to estimate the photosynthetic efficiency of photosystem II in three overwintering turfgrasses: Kentucky bluegrass (Poa pratensis 'Touchdown'), perennial ryegrass (Lolium perenne 'SR4200'), and supina bluegrass (Poa supina 'Supranova'). Throughout the fall, winter, and spring, crown samples were collected monthly from field plots in order to determine the carbohydrate composition and concentrations in these species. The F^D[v:F^D[m ratio of supina bluegrass was significantly lower than that of the other two species throughout the experimental period, indicating a lower photosynthetic efficiency. This effect, which was due to higher F‚āí readings in the supina bluegrass, was particularly pronounced in early spring. The relationship between the chlorophyll fluorescence readings, environmental parameters, and carbohydrates status in the three turfgrass species will be discussed."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Filiault, D. L., and J. C. Stier. 1999. Photosynthetic efficiency and carbohydrate status of overwintering turfgrasses. Annu. Meet. Abstr. 91:p. 123.
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