Temperature Relations of Lodgepole-Pine Seed Germination

Ecology ◽  
1931 ◽  
Vol 12 (4) ◽  
pp. 728-744 ◽  
Author(s):  
Ferdinand W. Haasis ◽  
Adrian C. Thrupp
Keyword(s):  
Seed Germination ◽  
Lodgepole Pine

Pathogenicity of postfire ascomycetes (Pezizales) on seeds and germinants of lodgepole pine

1986 ◽  
Vol 64 (10) ◽  
pp. 2368-2371 ◽  
Author(s):  
Keith N. Egger ◽  
J. W. Paden
Keyword(s):  
Seed Germination ◽  
Botrytis Cinerea ◽  
Pinus Contorta ◽  
Lodgepole Pine ◽  
Seed Infection

Forty isolates of postfire ascomycetes (Pezizales) were tested for in vitro pathogenicity on seeds and germinants of lodgepole pine, Pinus contorta Dougl. Two known pathogens, Caloscypha fulgens (Pers.) Boud. and Botrytis cinerea Pers., were included as a check of the method. Caloscypha fulgens was the only fungus that caused serious declines in seed germination, although several species of postfire Pezizales were capable of preemergence seed infection. Rhizina undulata Fr. and Pyropyxis rubra (Peck) Egger were strongly pathogenic on germinants. Pyropyxis rubra was not previously known to be pathogenic. Many isolates were weakly pathogenic on germinants under the conditions tested.

Lodgepole pine seed germination. III. Patterns of protein and nucleic acid synthesis in the megagametophyte and embryo

1991 ◽  
Vol 69 (2) ◽  
pp. 301-305 ◽  
Author(s):  
David J. Gifford ◽  
Phyllis L. Dale ◽  
Kevin A. Wenzel
Keyword(s):  
Nucleic Acid ◽  
Seed Germination ◽  
Seedling Growth ◽  
Lodgepole Pine ◽  
Acid Synthesis ◽  
Nucleic Acid Synthesis ◽  
Early Seedling Growth ◽  
Radicle Emergence ◽  
Early Seedling ◽  
Rna And Dna

A study of lodgepole pine (Pinus contorta Dougl.) seeds following imbibition at 28 °C has shown that in the megagametophyte, RNA and DNA levels remained constant until 5 days after imbibition when a decrease occurred. In the embryo, increases in RNA and DNA occurred 2 and 5 days after imbibition, respectively. Incorporation of [3H]uridine into total RNA was maximum by 2 days after imbibition in both the megagametophyte and the embryo. Incorporation of [3H]leucine into buffer-soluble protein showed a similar trend for both organs except that maximum incorporation occurred by 3 days after imbibition. An electrophoretic analysis of buffer-soluble proteins synthesized following the incorporation of [35S]methionine showed similar patterns for both the megagametophyte and the embryo. In both organs, the synthesis of three subsets of proteins was recognized. One subset was synthesized in the mature seed. Synthesis continued through germination but was terminated prior to radicle emergence. Synthesis of a second subset coincided with radicle emergence and continued during early seedling growth. A third subset was synthesized constitutively throughout germination and early seedling growth. Keywords: nucleic acid synthesis, protein synthesis, seed germination, lodgepole pine.

Ectomycorrhizas of lodgepole pine (Pinus contorta) seedlings originating from seed in southwestern Alberta cut blocks

1998 ◽  
Vol 76 (2) ◽  
pp. 213-217 ◽  
Author(s):  
S M Bradbury
Keyword(s):  
Seed Germination ◽  
Pinus Contorta ◽  
Host Plants ◽  
Lodgepole Pine ◽  
Sampling Time ◽  
Pine Seedlings ◽  
Seedling Roots ◽  
Fungal Associates ◽  
One Year

Lodgepole pine (Pinus contorta Dougl. ex Loud.) seedlings, originating from seed in three southwestern Alberta cut blocks, were sampled to identify their ectomycorrhizal associates. Fourteen ectomycorrhizal taxa were identified, 10 were common to all three cut blocks, and 12 to two cut blocks. Individual seedlings were colonized by two fungal associates on average and never had more than six fungal associates at one sampling time. Total percent colonization of seedling roots was greater than 50% one year after seed germination and greater than 90% two years after seed germination. Species richness increased throughout the course of the study; however, all but two ectomycorrhizal taxa were found in mature forests nearby. Typical late-stage ectomycorrhizal fungi colonized regenerating lodgepole pine seedlings in the absence of refuge host plants; therefore, either these fungi remained viable in situ between harvesting and regeneration or they migrated back into the cut block once revegetation was initiated.Key words: lodgepole pine seedlings, ectomycorrhiza, percent relative abundance, Alberta cut blocks.

Understanding lodgepole pine seed germination for improved utilization

2009 ◽  
Vol 37 (2) ◽  
pp. 316-328 ◽  
Author(s):  
Y.A. El-Kassaby ◽  
D. Kolotelo ◽  
D. Reid
Keyword(s):  
Seed Germination ◽  
Lodgepole Pine

Dissemination of the conifer seed fungus Caloscyphafulgens by small mammals

1984 ◽  
Vol 14 (1) ◽  
pp. 134-137
Author(s):  
Thomas P. Sullivan ◽  
Jack R. Sutherland ◽  
T. A. D. Woods ◽  
Druscilla S. Sullivan
Keyword(s):  
Seed Germination ◽  
Small Mammals ◽  
Lodgepole Pine ◽  
Pathogenic Fungus ◽  
White Spruce ◽  
Field Studies ◽  
Douglas Fir ◽  
Deer Mice ◽  
Red Squirrels ◽  
Conifer Seed

Field studies showed that the seed-pathogenic fungus Caloscyphafulgens (Pers.) Boudier was present in squirrel caches in 25% of the white spruce, Piceaglauca (Moench) Voss, stands in an area near Prince George, B.C. and in duff in 17 and 8% of the lodgepole pine, Pinuscontorta Dougl., clear-cuts there and at Williams Lake, respectively. In the laboratory, deer mice (Peromyscusmaniculatus Wagner), chipmunks (Eutamiastownsendii Bachman), and Douglas squirrels (Tamiasciurusdouglasii Bachman) consumed C. fulgens infested seeds of Douglas-fir, Pseudotsugamenziesii (Mirb.) Franco, lodgepole pine, and white spruce as readily as noninfested seeds. Squirrels also ate C. fulgens ascocarps and passed intact ascospores, but these were not observed to germinate. Red squirrels, T. hudsonicus Erxleben, moved, and ate seeds from, both infested and noninfested Douglas-fir cones in the field. It is proposed that C. fulgens is disseminated by squirrels, and perhaps other rodents, and that the fungus may preserve seeds in caches thereby ensuring squirrel food supplies between cone crops. Caloscyphafulgens may also prevent seed germination in direct seeding trials.

Dwarf mistletoe seed dispersal and germination in southwestern Alberta

1977 ◽  
Vol 7 (4) ◽  
pp. 589-594 ◽  
Author(s):  
John A. Muir
Keyword(s):  
Seed Germination ◽  
Seed Dispersal ◽  
Lodgepole Pine ◽  
Dwarf Mistletoe ◽  
Single Tree ◽  
In The Beginning

In 1966, numbers of seeds of dwarf mistletoe (Arceuthobiumamericanum Nutt. ex Engelm.) dispersed from two transplanted lodgepole pine (Pinuscontorta Dougl. var. latifolia Engelm.) decreased logarithmically with increasing distance from the trees. In two study areas in 1967–1969. dispersal of seeds from individual plants began in late August and was completed in 2–3 weeks. Differences of up to 2 weeks in the beginning and duration of dispersal were apparent between the areas. On one occasion, a difference in seed dispersal was noted between plants originating from seed collected at the two study areas and growing on a single tree at another location. Seed germination began in middle to late April, and in 4–6 weeks, 10–50% of the seeds had germinated.

beta-Glucosidase activities and HCN liberation in unimbibed and imbibed seeds, and the induction of cocklebur seed germination by cyanogenic glycosides

1991 ◽  
Vol 83 (1) ◽  
pp. 34-40 ◽  
Author(s):  
Yohji Esashi ◽  
Shinichi Matsuyama ◽  
Hiroki Ashino ◽  
Maria Ogasawara ◽  
Ryo Hasegawa
Keyword(s):  
Seed Germination ◽  
Cyanogenic Glycosides ◽  
Beta Glucosidase

Allelopathic effect of cumin (Cuminum cyminum L.) on seed germination of three weeds

Planta Medica ◽  
2011 ◽  
Vol 77 (12) ◽  
Author(s):  
A Soleymanifard ◽  
R Naseri ◽  
A Mirzaei ◽  
H Naserirad
Keyword(s):  
Seed Germination ◽  
Allelopathic Effect ◽  
Cuminum Cyminum
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