Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 105 for “"phloem"”.
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Dissection of phloem transport in cucurbitaceae by metabolomic analysis
… and perplexing questions relating to the phloem loading and transport mechanisms of Cucurbita maxima, by combining metabolomic analysis with cell biological techniques. This putative symplastic loading species has long been used for experiments on phloem anatomy, phloem biochemistry, …
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Identification and analysis of new phloem proteins from Brassicaceae and Cucurbitaceae
… aim of this work was the identification of new phloem sap proteins and a metabolic characterisation of this transport fluid. The experiments were performed on the three plant species C. sativus, C. maxima and B. napus. To characterise the phloem samples from B. napus, a new model plant for …
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Elucidation of the regulatory mechanism of SWEET11 phloem parenchyma cell-specific expression
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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On the role of sugar compartmentation and stachyose synthesis in symplastic phloem loading
Im Phloem werden Assimilate von den Source-Organen zu den Sink-Organen der Pflanze transportiert. Bei der Beladung des Phloems mit Assimilaten werden zwei mögliche Mechanismen unterschieden, die als apoplastische und symplastische Phloembeladung bezeichnet werden. Bei Pflanzenarten mit potentiell …
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Passive phloem loading and long-distance transport in a synthetic tree-on-a-chip
… photosynthetic cells to the export conduit (the phloem). In this thesis, we developed a synthetic microfluidic osmotic pump mimicking the mechanism of passive phloem loading, where sugars are transported by diffusion from a sugar reservoir to the phloem. This design allows the development of …
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Biophysikalische Untersuchung von Phloem-lokalisierten Carriern und Kaliumkanälen und deren Interaktion im Modellsystem der Xenopus Oozyte
Das Phloem stellt ein Netzwerk zur Assimilat- und Nährstofftranslokation sowie zur elektrischen Kommunikation innerhalb der Pflanze dar. In apoplastisch beladenden Pflanzen werden die funktionellen Eigenschaften des Phloems im Wesentlichen vom Zusammenspiel eines Transportmoduls, bestehend aus …
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Development of Phloem in the Stems of Botrychium Dissectum Variety Obliquum (Muhl.) Chute. And B. Oneidense (Gilb.) House
Made available in DSpace on 2014-12-14T13:23:10Z (GMT). No. of bitstreams: 1 7524438.pdf: 7350734 bytes, checksum: 75053b622d2467c93c328ed17eaf5888 (MD5) Previous issue date: 1975
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Der Keimblattapoplast von Ricinus communis L. - Kinetische Wechselwirkungen zwischen der Substratkonzentration und dem Langstreckentransport
… zwischen Blattapoplast, Blattgewebe, Phloem und Xylem nach Equilibrierung mit einer definierten apoplastischen Substratkonzentration zu messen und zu bilanzieren. Von Interesse waren die Elemente und Ionen Kohlenstoff (Saccharose), Stickstoff (Glutamin), Kalium, Phosphat und Sulfat. …
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The role of environment, sink capacity, and carbon translocation in determining C3 plant responses to elevated [CO2]
… 4, the hypothesis that different mechanisms of phloem loading can lead to a change in the photosynthetic response to elevated [CO2] was tested. Plants have evolved different strategies to load phloem with sugars to send to sink tissue. One method, apoplastic loading, uses active sugar …
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Cross-Species Translocation of mRNA from Host Plants into the Parasitic Plant Dodder
… tissue of a host plant. Contents of the host phloem translocate readily into the parasite, and shared plasmodesmata have been documented between host cortical cells and dodder searching hyphae. Dodder is known to transmit viruses from one host to another, which is consistent with viral ability …
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A multiscale study of plasmodesmata: from channel ultrastructure to plant architecture
… alterations resulting from mutation in the PHLOEM UNLOADING MEDIATOR gene or in the LONG CHAIN BASE KINASE 1 gene result in plasmodesmata morphological changes with consequences on cell-cell permeability. Moving to the protein component of plasmodesmata, I highlight that the family of …
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Spatio-temporal analysis of florigenic signals in Arabidopsis thaliana, Sinapis alba and Brassica napus
… signal is transduced to the shoot apex via the phloem to induce flowering remains to be elucidated. This study aimed at the identification of new candidates involved in the induction of flowering by employing three plant species, Arabidopsis thaliana, Sinapis alba and Brassica napus in …
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Zur Bedeutung von Saccharose-Transportern in Pflanzen mit offener Phloemanatomie
… Nährstoffe, wie z.B. Zucker, durch ein als Phloem bezeichnetes Transportgewebe. Der Langstreckentransport zwischen verschiedenen Teilen der Pflanze ist essentiell für deren Entwicklung und Ertragsbildung. Nach bisheriger Lehrmeinung gibt es zwei Wege, wie die Metabolite, insbesondere …
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Electron microscopic studies on barley yellow dwarf virus infection in oats
… by aphids that inject viral particles into the phloem of the host during the feeding process. BYDVs remain restricted to the phloem tissue and cause cytopathological alterations that ultimately lead to complete obliteration of the infected cell. Phloem cells are considered infected if they …
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Effects of Silicon -Based Fertilizer Applications on the Development and Reproduction of Insect Pests Associated With Greenhouse -Grown Crops
… fig plants do not inhibit feeding of certain phloem-feeding insect pests such as citrus mealybug and greenhouse whitefly. Although, silicon may function as a protective or mechanical barrier associated with increased epidermal leaf thickness/toughness and strengthening cell walls in certain …
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The developmental transcriptional landscape and organizing function of the sieve element in the root meristem
… elements, specialized tube-like cells in the phloem. While several regulators of sieve element differentiation have been described, many remain unknown. Furthermore, the temporal cascade of differentiation regulation remains unclear due to limited resolution in published data. In this study, …
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Identifying and characterizing genes that regulate vascular tissue-specific functions
… tissue-specific functions, we isolated xylem, phloem-cambium, and nonvascular tissues from the Arabidopsis root-hypocotyl, performed a genome-wide comparative analysis of tissue-specific transcripts using the 24K Affymetrix Arabidopsis ATH1 Genome Array (24K GeneChip), and identified potential …
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Molecular and Genomic Analysis of Nitrogen Regulation of Amino Acid Permease I (Aap1) in Arabidopsis
… transporter AAP1, this may lead to modulated phloem loading of amino acids and finally influence plant nitrogen status.
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Phosphate nutrition in the Ricinus communis L. seedling
… in the growth of seedlings. Uptake into the phloem was analyzed by incubating the cotyledons in Pi. The movement of 32P-labeled applied as an inorganic phosphate (Pi) was detected from the cotyledons to the hypocotyl, in particular to its apical hook near the cotyledons, suggesting that Pi …
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