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Showing 1 to 20 of 151 for “"xylem"”.
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Function and Regulation of Xylem Cysteine Protease 1 and Xylem Cysteine Protease 2 in Arabidopsis
… system, the tracheary elements of the xylem, is required to sustain plant growth and development. Tracheary element formation is dependent on many biological processes terminated by programmed cell death and cellular autolysis. The final two processes are probably dependent on the …
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Development of xylem-based water filters
… manufactured locally with little infrastructure, xylem-based filtration devices have potential to address the challenge of microbial contamination of water in resource-limited settings. Previous studies by Boutilier et al. have demonstrated the ability of sapwood xylem from conifers to achieve up …
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Experimental determination of pressures and velocities in plant xylem
… the experimental modeling of fluid flow in plant xylem. Three experiments were conducted to determine pressures and velocities in the conducting vessels of the xylem portion of a plant using corn syrup as the working fluid and Plexiglas tubing as the test section. The first experiment was …
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The Comparative Anatomy of The Xylem and Phylogeny of The Lauraceae
Made available in DSpace on 2014-12-05T22:00:02Z (GMT). No. of bitstreams: 1 0009151.pdf: 5499698 bytes, checksum: 34613d5b2277b080276136414f09e45f (MD5) Previous issue date: 1954
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Architecture and Evolution of Xylem-related Gene Coexpression Networks in Poplars
With the advent of sequencing technologies, a variety of methods have been available day by day. Each of these methods have helped scientists to for a deeper understanding of the biological function and evolutionary constraints on the relevant genes, which can be gained through the use of modern …
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Seedling xylem anatomy of two Banksia species relative to availability of groundwater
… anatomy to thrive under these conditions, and xylem anatomy and hydraulic architecture are common traits studied to understand plant adaptations and responses to changeable water availability. However, little is known about the changes to the hydraulic architecture of groundwater dependent …
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Promoter Deletion Analysis of Xylem Cysteine Protease 2 (XCP2) in Arabidopsis thaliana
The process of xylem tracheary element differentiation involves the coordination of vascular cambium activity, cell fate determination, cell expansion/elongation, secondary wall synthesis, programmed cell death, and cellular autolysis. The end result of tracheary element differentiation is a …
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Identification and evaluation of techniques for quality control of low-cost xylem filters
… of a low-cost membrane filter produced from the xylem of coniferous trees. Due to xylem structure variation and the potential for improper filter processing during mass production, quality control protocols are a necessity. Manufacturers must ensure xylem filters are functional in terms of …
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Characterization and preservation techniques of plant xylem as low cost membrane filtration devices
… Studies have been done to show that plant xylem from the sapwood of coniferous trees is capable of rejecting 99.99% of bacteria from feed solutions.16 Additionally, 4 L/d of water can be filtered with a ~ 1 cm² filter area using a transmembrane pressure of 5 psi, an amount sufficient to …
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Der Nährstofftransport im Fernleitungssystem des Xylem und dessen Beeinflussung durch Transpiration bei Ricinus und Pappel
… Calcium und Magnesium, dass der Massenfluss im Xylem aber auch die Aufnahme über die Wurzel stark reguliert ist und somit Änderungen des Transpirationsflusses ausgeglichen werden. Je nach Menge, chemischer Eigenschaft und physiologischer Funktion konnte der Massenfluss in Xylemstrom modifiziert …
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Untersuchungen zur Dynamik des Nährstofftransports im Xylem von Pappeln unter besonderer Berücksichtigung der Stickstoffversorgung des Sprosses
… Nährstoffen vom Sproß in die Wurzel erfolgt im Xylem. Ziel der vorliegenden Arbeit war es, den Nährstofftransport im Xylem junger Pappeln zu charakterisieren. Um ein umfassendes Bild zu erhalten, wurde der Nährstofftransport sowohl in Abhängigkeit von endogenen Faktoren ((a) NO3--Bedarf entlang …
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Water turnover in species-rich and species-poor deciduous forests: xylem sap flow and canopy transpiration
… Thüringen, wurden, beginnend im Jahr 2005, Xylemsaftflussmessungen mittels der Wärmeausbreitungsmethode nach Granier in sechs Laubwaldbeständen der gemäßigten Breiten durchgeführt. Diese Bestände unterscheiden sich in der Baumartenvielfalt von einer Art bis zu über 5 Baumarten. Die …
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Assessing safety margins and hydraulic strategies in Restionaceae: evaluating xylem hydraulic traits in two Elegia species
… of a trade-offs between stomatal regulation and xylem integrity, and the associated physiological adaptations. This is concerning in the face of climate change predictions of more frequent and intense drought and flooding events because predicted habitat water availability changes may exceed the …
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Plant xylem anatomy, dendrochronology and stable carbon isotopes as tools in rainfall reconstruction in Southern Africa
… vessel size and frequency in the cross-sectional xylem anatomy of archaeological charcoal that statements may be made on rainfall trends over the last 2000 years. These results indicate a general decrease in rainfall from 2300 BP to the present with a slightly wetter period during the Little Ice …
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Towards Identifying Cis and Trans Regulators of Expression of Xylem Cysteine Protease 1 (XCP1) in Arabidopsis
Secondary xylem, commonly known as wood, is a valuable commercial commodity. Among the major components of wood are the elongated, thick-walled water-conducting cells known as tracheary elements. Understanding tracheary element differentiation and maturation is of scientific and commercial …
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Tissue and Cell-Type Localization and Partial Characterization of a Xylem Papain-Type Cysteine Protease From Arabidopsis
Cysteine proteases are associated with xylem tracheary element differentiation. XCP1 was recently identified as a xylem-specific cysteine protease in Arabidopsis (Zhao, et al., 2000). For this study a recombinant polyhistidine-tagged XCP1 (XCP1H6) was expressed and purified from an E. coli …
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A study of isotopic composition of xylem water of woody vegetation and groundwater along a precipitation gradient in Namibia
… analyzed in groundwater, surface water and plant xylem water. Groundwater samples from the north east part of the country (Enyana and Fair constantia) were most depleted, while samples from the southern part (Guruchas) were enriched. A very weak negative correlation (R2=0.07), statistically …
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Studies in the comparative anatomy of the vessel elements of the secondary xylem of Acer nigrum, Platanus occidentalis, and Rhododendron maximum
The literature was reviewed for information regarding anatomical studies of secondary xyqlem - particularly information pertaining to <u>Acer Nigrum, Platanus occidentalis</u>, and <u>Rhododendron maximum</u>.
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