Type of Document Master's Thesis Author Luo, Wang-Juan URN etd-03172010-020308 Title Influence of seed and foliar applications of growth regulators on turfgrasses Degree Master of Science Department Crop and Soil Environmental Sciences Advisory Committee
Advisor Name Title Schmidt, Richard E. Committee Chair Bingham, S. Wayne Committee Member Hall, John R. III Committee Member Keywords
- Growth regulators
Date of Defense 1991-01-05 Availability restricted Abstract
The effects of propiconazole and seaweed extract seed treatments on the germination of Kentucky bluegrass (Poa pratensis L.) under osmotic and temperature stresses were determined in the laboratory. As polyethylene glycol (PEG) 8000 concentrations was increased from 50 to 250 g/L, percent germination was reduced. Propiconazole at 0, 0.5, 0.9, and 1.9 g a.i./kg of seed did not affect total germination, however, germination was delayed with propiconazole seed treatment. Plumule and radicle lengths of seedlings at the termination of experiment 21 days were inhibited with increasing PEG 8000 concentrations and propiconazole treatments.
Germination of seed treated with either propiconazole at 1.9 g a.i./kg of seed or seaweed extract at 13 g of product /kg of seed was determined under a range of temperatures from 15 to 40 C on a thermo gradient table. The optimum temperature for Kentucky bluegrass germination was at 25 C. Germination was decreased at temperature below 25 C and no germination was obtained at temperatures above 35 C. Seed treated with propiconazole or seaweed extract did not stimulate seed germination at the different temperatures.
Filename Size Approximate Download Time (Hours:Minutes:Seconds)
28.8 Modem 56K Modem ISDN (64 Kb) ISDN (128 Kb) Higher-speed Access LD5655.V855_1991.L86.pdf 2.32 Mb 00:10:43 00:05:31 00:04:49 00:02:24 00:00:12next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.
If you have questions or technical problems, please Contact DLA.