Publication Date
1997
Description
Dormancy can be induced in grass seeds by soaking in aqueous solution of gibberellin synthesis inhibitors, such as paclobutrazol and tetcyclacis. In a study conducted with perennial ryegrass (Lolium perenne L.) and tall fescue (Festuca arundinaceae Schreb.), dormancy was induced by a 48 hour soak at 35° C in 100 micromolar tetcyclacis (TCY) and 100 micromolar paclobutrazol (PB) as determined by failure to emerge at 20° C. Emergence in the untreated, water soaked, TCY soaked and PB soaked seeds were 92, 92, 10 and 18 % respectively. The containers containing seed and seedlings were then held at 5°C for 3 months and then transferred to 25° C for determining further emergence. Dormancy was released in tall fescue but not in perennial ryegrass. Emergence was 0, 2, 50 and 53% of the remaining untreated, water soaked, TCY and PB soaked tall fescue seeds, respectively. A field study using 120 micromolar PB soaked seeds at 15° C was planted in Corning, NY on 10/6/94. Percent cover measured on 7/25/95 was increased due to PB treatment from 33 to 75% for the tall fescue and from 22 to 43% for the perennial ryegrass.
Citation
Salon, P R. and Khan, A A., "The Induction of Dormancy in Grass Seed by Paclobutrazol: A Method to Improve Fall Seedings" (2024). IGC Proceedings (1993-2023). 55.
https://uknowledge.uky.edu/igc/1997/session22/55
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
The Induction of Dormancy in Grass Seed by Paclobutrazol: A Method to Improve Fall Seedings
Dormancy can be induced in grass seeds by soaking in aqueous solution of gibberellin synthesis inhibitors, such as paclobutrazol and tetcyclacis. In a study conducted with perennial ryegrass (Lolium perenne L.) and tall fescue (Festuca arundinaceae Schreb.), dormancy was induced by a 48 hour soak at 35° C in 100 micromolar tetcyclacis (TCY) and 100 micromolar paclobutrazol (PB) as determined by failure to emerge at 20° C. Emergence in the untreated, water soaked, TCY soaked and PB soaked seeds were 92, 92, 10 and 18 % respectively. The containers containing seed and seedlings were then held at 5°C for 3 months and then transferred to 25° C for determining further emergence. Dormancy was released in tall fescue but not in perennial ryegrass. Emergence was 0, 2, 50 and 53% of the remaining untreated, water soaked, TCY and PB soaked tall fescue seeds, respectively. A field study using 120 micromolar PB soaked seeds at 15° C was planted in Corning, NY on 10/6/94. Percent cover measured on 7/25/95 was increased due to PB treatment from 33 to 75% for the tall fescue and from 22 to 43% for the perennial ryegrass.
