Results 251 to 260 of about 12,314 (297)

Tyloses in fibre tracheids

Wood Science and Technology, 1972
Since the discovery of tyloses in the secondary xylem of angiosperms, their occurence has been noted only for vessels, although parenchyma cells necessary for their formation are also associated with fibriform elements. Sporadic remarks about tyloses in tracheids related to gymnosperm species, and the only observation on tyloses in angiosperm tracheids
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Conducting Units: Tracheids and Vessels

2002
The development of upright land plants depended on the development of a water-conducting system. Many of the earliest land plants, e.g., species of Rhynia and Cooksonia, had little woody stem, depending mostly on turgor pressure of soft tissues for support (Niklas 1993a,b). As plants evolved to taller sizes, water conduction and mechanical support were
Melvin T. Tyree, M. H. Zimmermann
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Wart Structure of Gymnosperm Tracheids

Nature, 1962
THE wart structure of mature tracheids was first described by Kobayashi and Utsumi1 and by Liese2. It was observed to consist of small excrescences (warts) (0&03–0.04µ diam.) on the inner surface of the cell wall. Subsequent surveys of the occurrence of these structures showed them to be of limited taxonomic significance3,4.
A. B. WARDROP, G. W. DAVIES
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Tracheid differentiation in tobacco pith cultures

Planta, 1966
Sterile pith cultures of Nicotiana tabacum have been induced to form localized regions of differentiating tracheids. These localized regions have been examined by phase, fluorescence, and electron microscopy, and polarization optics. Fixation for electron microscopy was with glutaraldehyde-osmium.
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Pine tracheids in plankton samples

Marine Pollution Bulletin, 1971
Abstract Pine tracheids found in Danish plankton samples are a novel pollutant. They are derived from plywood and cardboard manufacture, but whether or not they have any significance is unknown.
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Pitting of Transfusion Tracheids in Cupressaceae

Australian Journal of Botany, 1988
The morphology and development of the circular bordered pits on the transfusion tracheids in the leaves of Callitris muelleri are described from light microscopy of semithin sections and SEM studies of cut surfaces. Two parallel bars of thickening develop on the pit border either side of the aperture, and trabecula-like outgrowths develop into the cell
PA Gadek, CJ Quinn
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Tylosis Formation in Pinus Tracheids

Botanical Gazette, 1974
Abundant tyloses were discovered in the stem xylem of Pinus elliottii Engelm. and P. palustris Mill. following a combination of mechanical wounding and chemical treatment. Tyloses started from ray parenchyma and continued growing in vesicles of cells in tracheid lumens.
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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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Cytodifferentiation of maturing pine tracheids: The final stage

Tissue and Cell, 1972
Abstract The natural process of autolysis of protoplasm terminating the maturation of xylem tracheids starts with the formation of cytoplasmic spherules and the breakdown of cytoplasmic bridges which maintain the unity of the intravacuolar lamellate and filamentous reticulum of cytoplasm immersed in vacuolar sap.
T J, Wodzicki, W J, Humphreys
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Variations in tracheid length and morphological changes in tracheid tips associated with the development of compression wood

Wood Science and Technology, 1987
Variations in tracheid length and morphological features of tracheid tips within a growth ring associated with the development of compression wood were observed in young trees of Larix leptolepis Gord. and Abies firma Sieb. et Zucc. A reduction in tracheid length occurred with the development of compression wood within a growth ring. Such a decrease in
N. Yoshizawa, M. Kiyomiya, T. Idei
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