Full TGIF Record # 309470
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Web URL(s):https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/119944
    Last checked: 11/27/2019
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Boeri, Pablo Agustin; Unruh, J. Bryan; Kenworthy, Kevin E.; Trenholm, Laurie E.; Rios, Esteban F.
Author Affiliation:Boeri and Unruh: Environmental Horticulture, University of Florida West Florida Research & Education Center, Jay, FL; Kenworthy: Agronomy, University of Florida, Gainesville, FL; Trenholm: Environmental Horticulture, University of Florida, Gainesville, FL
Title:Identifying turf type bahiagrass genotypes with improved drought response characteristics
Section:C05 turfgrass science
Other records with the "C05 turfgrass science" Section

Turf ecology and management oral I: Physiology, irrigation, and abiotic stress (includes student competition)
Other records with the "Turf ecology and management oral I: Physiology, irrigation, and abiotic stress (includes student competition)" Section
Meeting Info.:San Antonio, Texas: November 10-13, 2019
Source:ASA, CSSA and SSSA International Annual Meetings. 2019, p. 119944.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Keywords:TIC Keywords: Carbon dioxide exchange rate; Chlorophyll fluorescence; Cultivar evaluation; Drought resistance; Genotyping; Low maintenance; Paspalum notatum; Stenotaphrum secundatum; Stress response; Zoysia japonica
Cultivar Names:WilM7; Argentine; Empire; Floratam; WilM10
Abstract/Contents:"Using low input turfgrasses can enhance water conservation and mitigate environmental impacts. Two experimental bahiagrass (Paspalum notatum Flugge) lines were selected for their improved turf traits. These Wilmington genotypes (WilM7 and WilM10) were compared with 'Argentine' bahiagrass, 'Empire' zoysiagrass (Zoysia japonica Steud.) and 'Floratam' St. Augustinegrass [Stenotaphrum secundatum (Walt.) Kuntze] for their drought responses. Plants were grown under greenhouse conditions in 6.4 X 120 cm clear acrylic tubes. Two treatments were imposed; a well-watered and a dry down. Thresholds (10% decline) and midpoints (50% decline) were used to compare photosynthesis, transpiration and turf quality during drought stress. CO2 gas exchange rates (╬╝mol CO2 m-2s-1) and chlorophyll fluorescence (Fv/Fm) measurements were performed using a Licor LI-6800. Drought responses initiated with a decrease in gas exchange and transpiration, followed by a decline in turf quality. Fv/Fm reductions were detected later in the drying cycle. Both bahiagrass experimental lines, zoysiagrass and St. Augustinegrass reduced transpiration at higher soil water values compared to Argentine. WilM10, WiM7 and zoysiagrass showed better drought responses, which were indicated by its lower midpoint for turf quality and lower threshold for Fv/Fm. Results from this research suggest that WiM10 above ground physiological responses to drought resemble Empire zoysiagrass. Furthermore, WilM10 and WilM7 may have improved drought avoidance characteristics compared to Argentine. Better turfgrass performance was characterized by a maintenance in Fv/Fm throughout the dry down and early reductions in transpiration."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Boeri, P. A., J. B. Unruh, K. E. Kenworthy, L. E. Trenholm, and E. F. Rios. 2019. Identifying turf type bahiagrass genotypes with improved drought response characteristics. Agron. Abr. p. 119944.
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