Results 181 to 190 of about 16,202 (227)
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Plasmodesmata and pit development in secondary xylem elements
Planta, 1982Developing pit membranes of secondary xylem elements in Drimys winteri, Fagus sylvatica, Quercus robur, Sorbus aucuparia, Tilia vulgaris and Trochodendron aralioides have been examined by transmission electron microscopy. Absence of plasmodesmata from the membranes of vessel elements and tracheids indicates that their pits develop independently of ...
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Secondary cell wall patterning during xylem differentiation
Current Opinion in Plant Biology, 2012Xylem cell differentiation involves temporal and spatial regulation of secondary cell wall deposition. The cortical microtubules are known to regulate the spatial pattern of the secondary cell wall by orientating cellulose deposition. However, it is largely unknown how the microtubule arrangement is regulated during secondary wall formation.
Yoshihisa, Oda, Hiroo, Fukuda
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On the ultrastructure of differentiating secondary xylem in willow
Protoplasma, 1968Studies of differentiating xylem inSalix fragilis L. show the immediate cambial derivatives to be ultrastructurally similar. The Golgi apparatus is important at all stages of wall synthesis, possibly producing (amongst other substances) hemicellulose material which is carried to the wall in vesicles or multivesicular bodies.
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The Developing Architecture of Secondary Xylem in Conifers
Forest Science, 1964Abstract It is suggested, that in the formation of coniferous tracheids, the amount of cell-wall material that can be developed in the maturation of a specific cell is a function of the parentage of the cell and is fixed for that cell at the time of cell division.
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Histochemical Detection of Peroxidase and Laccase Activities in Populus Secondary Xylem
2023Peroxidases (PRXs) and laccases (LACs) are enzymes involved in catalyzing the oxidation of the lignin monomers to facilitate lignin polymerization. However, due to the large number of genes composing these two families of enzymes, many details regarding their specific localization are only partially understood.
Marta-Marina Pérez, Alonso +2 more
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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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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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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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