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| Publication Type:
| Refereed |
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| Author(s): | Brar, G. S.;
Palazzo, A. J. |
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| Author Affiliation: | US Army Corps of Engineers, Cold Regions Research and Engineering Laboratory, 72 Lyme Road, Hanover, NH 03755 |
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| Title: | Temperature and germination relationships of Festuca varieties |
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| Source: | Plant Varieties and Seeds. Vol. 10, No. 2, August 1997, p. 103-111. |
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| Publishing Information: | Oxford: Blackwell Scientific Publications |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Festuca; Festuca arundinacea; Festuca rubra; Polyethylene; Germination; Seed testing; Germination inhibitors; Establishment rate; Temperatures; Temperature profile; Cultivars; Variety trials
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| Abstract/Contents: | "Many studies have shown that water potential at planting will affect the germination rate and final germination of Festuca varieties. Limited information is available about the extent of variability in temperature dependence of germination among different Festuca varieties. Our objective was to study germination at five temperatures for a wide range of Festuca varieties. Festuca seeds were screened for germination during 28 days in polyethylene growth pouches held at constant temperatures of 10°, 15°, 20°, 25°, or 30°C. The germination percentage significantly (P<0.05) increased as the temperature increased from 10° to 15°C and decreased thereafter. The variety 'Clemfine' tall fescue (Festuca arundinacea Schreb) had the greatest germination percentage and 'Arctared' red fescue) Festuca rubra L.) had the least when averaged across the five temperatures. Conversely the average time to germination (A[tg) was greatest at 10°C and least at 30°C. Reaching a germination level of 80% or more of the seeds required 14 d at 10°C, 9 d at 15°C, 8 d at 20°C, and 7 d at 25°C or 30°C. Base temperatures required for germination of Festuca species were 3.2°C for rapid germinators, 3.6 to 6°C for medium germinators, and 4 to 6°C for slow germinators. Heat units calculated for the rapid germinators were 129°C d 120 to 140°C d for medium germinators, and 135 to 191°C for the slow germinators. Germination decreased as heat units increased. The A[tg and heat units regressions explained 91% and 66% of the variations in germination, repectively. The optimum temperatue for germination of Festuca varieties was 15°C. Seeding time for some Festuca varieties could be varied based on expected seed zone temperatures for particular locations. Rapidity and total germination are the most obvious factors distinguishing Festuca varieties. This study demonstrates the variability in rate and extent of varieties in germination in response to temperature." |
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| Language: | English |
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| References: | 25 |
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| Note: | Tables
Figures |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Brar, G. S., and A. J. Palazzo. 1997. Temperature and germination relationships of Festuca varieties. Plant Var. Seeds. 10(2):p. 103-111. |
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