Results 181 to 190 of about 3,190,573 (222)
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The Secondary Xylem of the Violaceae: A Comparative Study
Botanical Gazette, 1972The Violaceae exhibit a range of structural variability in the secondary xylem Included in the family are genera whose wood is strikingly primitive along with others that show more advanced, but not highly evolved, features In spite of the variation encountered, however, it would seem that the anatomist is dealing here with a secondary xylem that ...
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PtoNAC90 is a positive regulator for secondary xylem development in Populus
International Journal of Biological MacromoleculesSecondary growth is regulated by numerous transcription factors under multi-level transcriptional control; however, only a few are considered as key regulators of secondary cell walls biosynthesis in Populus. This study identified PtoNAC90 as a transcription factor crucial for xylem development in Populus.
Leiqian, Sun +7 more
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Large-scale statistical analysis of secondary xylem ESTs in pine
Plant Molecular Biology, 2005A computational analysis of pine transcripts was conducted to contribute to the functional annotation of conifer sequences. A statistical analysis of expressed sequential tags(ESTs) belonging the 7732 contigs in the TIGR Pinus Gene Index (PGI1.0) identified 260 differentially represented gene sequences across six cDNA libraries from loblolly pine ...
Nathalie, Pavy +3 more
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The effect of light deficiency on the formation of secondary xylem
Wood Science and Technology, 1969Light is one of the most important environmental factors influencing the cambium activity and consequently the formation of the secondary xylem. Its deficiency more or less inhibits the lignification of cell walls and also the formation of conductive tissues represented by the vessel system. From these results, if compared with those of bent stems, the
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Secondary xylem development in Arabidopsis: a model for wood formation
Physiologia Plantarum, 2002Our understanding of the molecular controls regulating the identity of the vascular cambium and the development of secondary xylem and phloem have not yet benefited much from the use of Arabidopsis as a genetic system. Under appropriate growth conditions Arabidopsis undergoes extensive secondary growth in the hypocotyl, with the development of both a ...
Nigel, Chaffey +3 more
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THE COMPARATIVE ANATOMY OF THE SECONDARY XYLEM AND THE PHYLOGENY OF THE EUCOMMIACEAE
American Journal of Botany, 1940IN 1921 Parkin, discussing the systematic position of Eucommia, wrote: "This tree might repay further study from the anatomical side. The wood especially requires minute examination. Facts might possibly be forthcoming which would throw light on its relationship." The present writer (1938) came to the same conclusion in the course of an investigation ...
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THE PRODUCTION AND DIFFERENTIATION OF SECONDARY XYLEM IN XANTHIUM PENSYLVANICUM
American Journal of Botany, 1970The removal of leaves and buds from the shoot of Xanthium seedlings caused the cessation of xylem fiber differentiation in all internodes while allowing the production of cambial derivatives to continue toward both the xylem and the phloem.
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Dimorphism of Secondary Xylem in two Species of Cacti
Flora, 1978Summary In certain cacti with dimorphic upper stems, secondary xylem is different in each type of stem. Neoraimondia rosiflora , a columnar species from Peru, has fibrous wood in long stems but nonfibrous wood in long-lived spur shoots that bear flowers. Vessels in nonfibrous secondary xylem have very scanty secondary walls.
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The Anatomy of Secondary Xylem and the Classification of Ancient Dicotyledons
1977The stem wood of about 700 species belonging to 32 families of the order Magnoliales s.l., plus further taxa exhibiting primitive wood anatomical features, was investigated. On this basis, six structural groups can be established each of which show a marked gradation from primitive to advanced stages.
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