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11 results found
It is well understood that native grasses are ecologically important and provide numerous benefits. However, unfavorable economics, low seed yields for some species, genetic issues, and a lack of experience behind the production and establishment of most western Oregon native grasses remain…
Author(s): Dale C. Darris
Keywords: native grasses, seed production, establishment, seed dormancy, seeding prescription, revegetation, restoration, seeding rates
Source: In: Dumroese, R. K.; Riley, L. E.; Landis, T. D., tech. coords. 2005. National proceedings: Forest and Conservation Nursery Associations—2004; 2004 July 12–15; Charleston, NC; and 2004 July 26–29; Medford, OR. Proc. RMRS-P-35. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 119-128
Year: 2005
Loblolly pine (Pinus taeda L.) seeds were exposed to an electromagnetic radiation treatment (Energy Transfer Process, marketed by the Energy Transfer Corporation), and the effects of the treatments on seed germination, seedling development, disease resistance, and field performance of seedlings…
Author(s): James P. Barnett, Stanley L. Krugman
Keywords: Energy Transfer Process, germination speed, germination value, Gray Process, Pinus taeda, seed dormancy, seedling survival and growth
Source: Res. Note SO-356. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 7 p.
Year: 1989
Tree improvement programs have influenced significantly the quality of southern pine seeds produced when compared to collections from native stands. Seed orchard management practices such as fertilization can increase seed size and reduce seed dormancy. These result in the need for less complex…
Author(s): James P. Barnett
Keywords: Pinus spp, seed germination, seed dormancy, seed storage, cone maturity
Source: The Forestry Chronicle, Vol. 72, NO. 5
Year: 1996
Seed dormancy is assumed to be unimportant for population dynamics of temperate woody species, because seeds occur at low densities and are short lived in forest soils. However, low soil seed densities may result from low seed production, and even modest seed longevity can buffer against…
Author(s): Janneke Hille Ris Lambers, James S. Clark, Michael Lavine
Keywords: Bayesian statistics, bet hedging, recruitment limitation, seed banking, seed dormancy, Southern Appalachian forests, species coexistence
Source: Ecology. 86(1): 85-95
Year: 2002
Seasonal riparian seedbed temperatures were measured and germination of Carex utriculata and C. nebrascensis seeds was tested in relation to chilling, perigynia removal, incubation temperature, and light to help guide propagation and direct seeding of these species for riparian restoration. Diurnal…
Author(s): Kimberly L. Jones, Bruce A. Roundy, Nancy L. Shaw, Jeffrey R. Taylor
Keywords: seed dormancy, sedge, revegetation, wetlands, chilling, perigynia, temperature, light, overwintering
Source: Wetlands. 24(2): 467-479.
Year: 2004
Seed dormancy is a survival strategy that better ensures the persistence of a species. Dormancy is characterized as exogenous if caused by factors outside the embryo or endogenous if caused by factors within the embryo. Exogenous dormancy is further characterized as physical, mechanical or chemical…
Author(s): C. D. Jones, S. L. Jensen, M. R. Stevens
Keywords: seed scarification, seed dormancy, Lupinus species
Source: In: Pendleton, Rosemary; Meyer, Susan; Schultz, Bitsy, eds. Conference Proceedings: Seed Ecology III - The Third International Society for Seed Science Meeting on Seeds and the Environment - "Seeds and Change"; June 20-June 24, 2010; Salt Lake City, Utah, USA. Albuquerque, NM: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 74-75.
Year: 2010
Creeping sage (Salvia sonomensis Greene), a semi-shrub, is useful for plantings to reduce fire hazard and to stabilize soil. The most effective, practical, and lasting technique to break seed dormancy was a soaking in gibberellic acid under constant agitation at 500 p.p.m. for 4 hours. Lesser…
Author(s): Eamor C. Nord, Louis E. Gunter, Stuart A. Graham Jr.
Keywords: Salvia sonomensis, seed dormancy, seed treatments, gibberellic acid
Source: Res. Note PSW-RN-259. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p
Year: 1971
Pyrenophora semeniperda, an important pathogen in Bromus tectorum seed banks in semi-arid western North America, exhibits >4-fold variation in mycelial growth rate. Host seeds exhibit seasonal changes in dormancy that affect the risk of pathogen-caused mortality. The hypothesis tested is that…
Author(s): S. E. Meyer, M. Masi, S. Clement, T. L. Davis, J. Beckstead
Keywords: Bromus tectorum, co-inoculation, competition, cytochalasin B, seed bank, seed dormancy
Source: Plant Pathology. 64: 1450-1460.
Year: 2015
Seeds of most Great Basin lupine (Lupinus spp. [Fabaceae]) species are physically dormant and thus, difficult to establish in uniform stands in seed production fields. We designed this study to examine 5 seed scarification techniques, each with 11 levels of application (including a non-scarified…
Author(s): Covy D. Jones, Mikel R. Stevens, Von D. Jolley, Bryan G. Hopkins, Scott L. Jensen, Dave Turner, Jason M. Stettler
Keywords: seed dormancy, physical dormancy, germination, thermal scarification, chemical scarification, mechanical scarification, Fabaceae
Source: Native Plants Journal. 17(1): 5-17.
Year: 2016
Spatial and temporal environmental variability can lead to variation in selection pressures across a landscape. Strategies for coping with environmental heterogeneity range from specialized phenotypic responses to a narrow range of conditions to generalist strategies that function under a range of…
Author(s): Sarah Barga, Thomas E. Dilts, Elizabeth A. Leger
Keywords: seed dormancy, Great Basin, intra-specific variation, population-level variation, seed traits
Source: Oecologia. 185: 437-452.
Year: 2017