Results 181 to 190 of about 9,108 (230)

Tracheid differentiation in Pinus radiata

Wood Science and Technology, 1977
Differentiating tracheids in Pinus radiata D. Don have been examined with the electron microscope. Despite the fact that one of the major differentiation processes is cellulose formation, little ultrastructural evidence has been found to indicate how this occurs. On the other hand, there is ample evidence of the incorporation of non-cellulosic material
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MICROFIBRIL ANGLES IN THE ROOT WOOD OF PINUS RADIATA AND PINUS NIGRA

IAWA Journal, 2001
Microfibril angles of the S2 layer and tracheid lengths were measured in the root wood of Pinus nigra, and the root and stem wood of Pinus radiata. Within 10 mm (the first 2–3 growth rings) from the root centre, microfibril angles were large in the wood of both species, ranging from 25° to 40°.
Junji Matsumura, Brian G. Butterfield
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Resistance of Pinus densiflora and Pinus rigida × radiata to Fomes annosus

European Journal of Forest Pathology, 1979
AbstractThe stemwood of Pinus densiflora was found to be more resistant than the stemwood of Pinus rigida × radiata in inhibiting the decaying activity and linear growth of Fomes annosus. The chemical factors responsible for the variations in resistance were extractable in chloroform. One fraction isolated from the chloroform extract of P.
M. T. Dumas, M. Hubbes
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Genetic Transformation of Pinus radiata

2000
Pinus radiata is the main forest tree species planted in commercial forestry in New Zealand and has been grown for more than 100-years. It was originally introduced from California and an intensive tree improvement program, which started in the early 1950s, has concentrated on better growth rate, stem form, and lack of stem cones on the lower stem ...
C. Walter, D. R. Smith
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Cold Hardiness of Radiata Pine (Pinus radiata D. Don)

2001
Pinus radiata D. Don is native to North America, with three mainland populations on the coast of central California and two island populations off the coast of Baja California, Mexico (Scott 1960). The species occupies only about 7,000 ha in its natural habitat and is of little commercial significance (Burdon and Miller 1992), except to the Christmas ...
Dennis H. Greer, Mike I. Menzies, Ian J. Warrington   +2 more
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A xyloglucan in etiolated seedlings of Pinus radiata

Phytochemistry, 1997
Abstract The changes in cell wall carbohydrates and starch were investigated in hypocotyls and cotyledons during growth of etiolated seedlings of Pinus radiata. Starch was depleted within two weeks with an accompanying rise in a hemicellulosic xyloglucan component. This was purified by fractional precipitation.
Ian G. Andrew, John W.L. Little
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Carbohydrate Metabolism in the Sapwood of Pinus radiata

Nature, 1963
THE use of carbon-14 produced in nuclear bomb testing in biological investigation has been discussed in an earlier communication1. Since 1954 the specific activity of the carbon dioxide in the atmosphere over New Zealand has been increasing, as is shown in Fig. 1 2. We have used this effect to examine the carbohydrate metabolism of Pinus radiata.
A. T. WILSON, J. M. GUMBLEY
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DAMAGE TO PINUS RADIATA BY CLIMATIC AGENTS

Australian Forestry, 1947
SUMMARY From observations made, principally in the Australian Capital Territory, damage to Pinus radiata (Monterey pine) caused by various climatic agents is described. Low temperatures are considered to be responsible for needle discoloration in winter and dead tips and needles in certain cases in young trees, small frost cracks, frost rings and ...
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Particleboards with Pinus radiata Bark

1991
Mixtures of Pinus radiata D. Don back and wood particles for the production of particleboards were studied. Single layer boards with the following processing parameters were manufactured: Board thickness: 11 mm; Board density: 650 kg/m3 ; Adhesive content: 8% urea-resin solids, based on ovendry weight of particles; Bark content (%): 0; 10; 25; 40; 55 ...
Poblete W., Hernán, Sánchez A., Juan P.   +1 more
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Resin Metabolism in the Sapwood of Pinus radiata

Nature, 1963
Carbon-14 produced in nuclear explosions was used as a tracer to examine resin metabolism in Pinus radiata. Annual rings of trees were ground and the resin extracted. The C/sup 12/: C/sup 13/ and C/sup 14/ ratio of each sample was determined. Results indicate that all the resin activity is considerably lower than that of the atmosphere at the time the ...
A. T. WILSON, J. M. GUMBLEY, D. J. SPEDDING   +2 more
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