Title page for ETD etd-07312007-202603


Type of Document Master's Thesis
Author Marshall, Christopher Scott
URN etd-07312007-202603
Title The Use of Plant Growth Regulators to Improve the Traffic Tolerance and Repair of Overseeded Bermudagrass
Degree Master of Science
Department Crop and Soil Environmental Sciences
Advisory Committee
Advisor Name Title
Ervin, Erik H. Committee Chair
Askew, Shawn D. Committee Member
Goatley, J. Michael Jr. Committee Member
Keywords
  • 2-Chloro-4-pyridyl-phenylurea
  • Trinexapac-ethyl
  • Cynodon hybrida
  • Traffic Tolerance
  • 6-Benzyladenine
Date of Defense 2007-06-20
Availability unrestricted
Abstract
An active football season during the fall acclimation period tests the traffic tolerance of bermudagrass. Exogenous applications of synthetic cytokinins or cytokinin-enhancing plant growth regulators (PGRs), such as trinexapac-ethyl, may improve the traffic tolerance of "Patriot" and "Tifsport" hybrid berudagrasses (Cynodon dactylon var. dactylon x Cynodon transvaalensis). This study was designed to mimic the agronomic practices and traffic stresses experienced at Virginia Tech's Worsham Field. Starting in September 2005, treatments were applied with a differential-slip traffic simulator. Following a traffic treatment, plots received an application of one of three PGRs: 6-Benzyladenine (6-BA), 2-Chloro-4-pyridyl-phenylurea (CPPU) or trinexapac-ethyl (TE). Physiological and morphological responses such as total non-structural carbohydrates and turf density were measured. Previous researchers have shown that increased tissue cytokinins are related to increased tiller density, delay of senescence and enhanced photochemical efficiency. For these reasons, the application of cytokinin enhancing PGRs may have potential to increase bermudagrass traffic tolerance. Patriot's aggressive growth and excellent cold hardiness are predicted to result in better overall traffic tolerance and repair as compared to Tifsport.
Files
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  coverandabstract.pdf 75.56 Kb 00:00:20 00:00:10 00:00:09 00:00:04 < 00:00:01
  Front.pdf 79.53 Kb 00:00:22 00:00:11 00:00:09 00:00:04 < 00:00:01
  Thesis.pdf 830.57 Kb 00:03:50 00:01:58 00:01:43 00:00:51 00:00:04

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