Full TGIF Record # 842
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Web URL(s):https://dl.sciencesocieties.org/publications/aj/pdfs/69/1/AJ0690010061
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Publication Type:
i
Refereed
Author(s):Nelson, C. J.; Dunn, J. H.; Coutts, J. H.
Author Affiliation:Nelson: Professor, Department of Agronomy; Dunn: Associate Professor, Department of Horticulture; Coutts: Research Specialist, Department of Agronomy, University of Missouri, Columbia, Missouri
Title:Growth responses of tall fescue and bermudagrass to leaf applications of ancymidol
Source:Agronomy Journal. Vol. 69, No. 1, January/February 1977, p. 61-64.
Publishing Information:Madison, WI: American Society of Agronomy
# of Pages:4
Keywords:TIC Keywords: Carbohydrate concentration; Festuca arundinacea; Ancymidol; Roots; Cynodon dactylon; Leaves; Plant Growth Regulators; Water use; Carbon dioxide exchange rate
Abstract/Contents:"Growth inhibitors are used for topgrowth control of turfgrasses, but little information exists on associated physiological responses or growth of other plant parts. Therefore, experiments were conducted with ancymidol and an analog to assess their potential as growth retardants and their effects on physiological processes associated with vigor and tolerance to environmental stress. Tall fescue (Festuca arundinacea Schreb.) and bermudagrass [Cynodon dactylon (L.) Pers.] were grown under controlled environment conditions, and regrowth was measured for up to 32 days following application of foliar sprays of inhibitor. Topgrowth of bermudagrass was almost stopped at concentrations of ancymidol above 100 ppm, whereas tall fescue gave a quantitative growth response over the 100 to 600 ppm range. Root weight of treated bermudagrass was less than the control after a 21-day regrowth period, but not when the growth period was 32 days. Root growth of tall fescue was not affected by treatment. Stubble weight of bermudagrass, which included leaf and stem tissue up to 6 cm above soil level, tended to be increased by treatment. Stubble weight of tall fescue was unaffected. Stolon number and weight were reduced about 50% by treatment of bermudagrass whereas tiller number of tall fescue was increased up to 30%. Concentration of storage carbohydrate was reduced 10 to 20% in stubble and stolons of treated bermudagrass, and 25 to 40% in all tissue of treated tall fescue. This probably occurred because net CO2 exchange per pot was usually reduced by treatments due to decreased leaf area. Net CO2 uptake of both species on a leaf area basis was unaffected. Water use per pot per day was 20 to 25% lower in treated plants. Results suggest that short-term growth control may be feasible to reduce transpiration. Long term control, such as slowing growth in fall to increase frost resistance, may also be possible. However, in this study storage carbohydrate levels were lower than controls, and thus plants may not be vigorous enough to maintain themselves over long time intervals."
Language:English
References:10
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Nelson, C. J., J. H. Dunn, and J. H. Coutts. 1977. Growth responses of tall fescue and bermudagrass to leaf applications of ancymidol. Agron. J. 69(1):p. 61-64.
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Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/69/1/AJ0690010061
    Last checked: 12/08/2016
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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