Results 181 to 190 of about 6,068 (225)
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Pseudotsuga menziesii chemical races of California and Oregon
Biochemical Systematics and Ecology, 1975Abstract Cortical oleoresin from more than 300 Douglas-fir trees sampled in over 30 localities throughout California and southern Oregon was analyzed for its monoterpene hydrocarbon composition. The results confirmed the existence of a distinct chemical race found in its pure unhybridized form throughout the Sierra Nevada as well as near Lompoc in ...
Eugene Zavarin, Karel Snajberk
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Somatic Embryogenesis in Douglas-fir (Pseudotsuga Menziesii)
1995Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) is one of the most important timber species in the world and is a member of the Pinaceae family. It is the principal timber species in the Pacific Northwest of America, where it reaches up to 126 m in height and 5 m in diameter (Hermann & Lavender, 1990) and a standing volume up to 5,460 m3/h in the ...
Pramod K. Gupta +4 more
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Nuclear bodies in Douglas fir (Pseudotsuga menziesii Mirb.) microspores
Protoplasma, 2008The identification of nucleolar proteins and immunocytochemical localization of small nuclear ribonucleoprotein (snRNP) elements revealed the presence of three types of nuclear bodies in Douglas fir microspore nuclei. One type consists of structures resembling Cajal bodies (CBs) and contains nucleolar proteins as well as snRNPs and U2 snRNA. The second
Janusz, Niedojadło +2 more
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Mycorrhizal fungi of Pseudotsuga menziesii in the south island of New Zealand
Soil Biology and Biochemistry, 1981Abstract Attempts were made to isolate mycorrhizal fungi of a timber species, Pseudotsuga menziesii (Mirb.) Franco which is exotic to New ZeaLond. Over 2000 pieces of mycorrhizal roots were plated out on Hagem medium and modified Melin-Norkrans medium; 14% of these yielded Rhizopogon vinicolor A. H. Smith, 6% gave rise to Amanita muscaria (L. ex Fr.)
Chu-Chou Myra, Lynette J. Grace
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Douglas-Fir [Pseudotsuga menziesii (Mirb.) Franco]
1989The genus Pseudotsuga (Pinaceae) consists of eight species (El-Kassaby et al. 1983). Six species occur naturally in eastern Asia in non-overlapping ranges. Pseudotsuga japonica (Shiras.) Beissn. occurs in Japan and P. wilsoniana Hayata in Taiwan. Pseudotsuga forrestii Craib., P. sinensis Dode, P. gaussenii Flous and P. brevifolia Chang et L. K. Fu. are
B. Goldfarb, J. B. Zaerr
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Detection and identification of gibberellins in Douglas fir (Pseudotsuga menziesii) shoots
Physiologia Plantarum, 1992Extracts of Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) shoots were purified by reversed and normal phase HPLC; gibberellin (GA)‐like compounds detected by radioimmunoassay with antibodies against GA4 and the Tan‐ginbozu dwarf rice micro‐drop biossay were analyzed by GC‐MS.
Doumas, Patrick +3 more
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Embryonic Genetic Load in Coastal Douglas-Fir, Pseudotsuga menziesii var. Menziesii
The American Naturalist, 1969Thirty-five coastal Douglas-fir trees were evaluated for embryonic genetic load from comparisons of sound seed set following self- and cross-pollinations, that is, from determinations of relative self-fertility. Estimates for the 35 trees ranged from about 3 to about 27 lethal equivalents per zygote active in the embryo stage, with the median tree ...
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Materials of the International Youth Scientific and Practical Conference "FORESTRY-BIOLOGICAL FOUNDATIONS OF SUSTAINABILITY OF NATURAL AND ARTIFICIAL PHYTOCOENOSES"
In order to solve the problems of preserving the ecological potential in protective forests of the forest-steppe region of the European part of Russia, it is envisaged to develop and apply technologies that ensure the preservation of ecological functions of forests and their biological diversity, where the introduction of introduced species is allowed ...
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In order to solve the problems of preserving the ecological potential in protective forests of the forest-steppe region of the European part of Russia, it is envisaged to develop and apply technologies that ensure the preservation of ecological functions of forests and their biological diversity, where the introduction of introduced species is allowed ...
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Douglas-Fir (Pseudotsuga menziesii (Mirb.) Franco)
2013Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) is native to the Pacific coast range and along the Rocky Mountains through Canada and USA. In the early 19th nineteenth century, it was introduced to Western Europe, where nowadays it covers almost 800,000 ha.
Jean-Charles Bastien +2 more
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Technological characteristics of Pseudotsuga menziesii growing in Valdivia
1988This study analizes some of the physical and mechanical properties of Douglas-fir trees from three stands located on the coast of the province of Valdivia, Chile. Specific gravity, skrinkage, tracheid length, compression parallel to grain, static bending, hardness Janka and nail withdrawal were determined.
Diaz-Vaz, J. E. +3 more
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