Influence of seed and foliar applications of growth regulators on turfgrasses

The effects of propiconazole and seaweed extract seed treatments on the germination of Kentucky bluegrass (<i>Poa pratensis L.</i>) 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.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Crop and Soil Environmental Sciences

Department dc:contributor.department

Crop and Soil Environmental Sciences

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

1991

Author dc:creator

• Luo, Wang-Juan

Chair dc:contributor.committeechair

• Schmidt, Richard E.

Committee members dc:contributor.committeemember

• Bingham, Samuel Wayne
• Hall, John R.

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en

Dc Identifier Other

etd-03172010-020308

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/41674