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.
Results
Showing 1 to 20 of 22 for “"Phytochrome"”.
-
Analysis of phytochrome signaling pathways in Zea mays
Phytochromes are photoreceptors that mediate red and far-red light signaling and control growth and development of plants in response to different light conditions. The genome of Arabidopsis, a dicot, contains five members of the phytochrome family, phyA-phyE. In contrast, genomes of monocots …
-
The Function and Regulation of Photobodies in Phytochrome Signaling
… the red- and far-red light-sensing phytochromes (phys) are arguably the best studied, but the earliest events in the phy signaling pathway remain poorly understood. One of the earliest phy signaling events is the translocation of photoactivated phys from the cytoplasm to the nucleus, …
-
Characterisation of mutants involved in Phytochrome A nuclear import and signal transduction
… of the screen was to isolate and characterise Phytochrome A (phyA) nuclear transport mutants. The screening was performed in two steps. First, the mutagenised seedlings were selected on the basis of differences in hypocotyl length. In a second step, the selected putants were screened for …
-
Characterization of eid3 and the putative rei mutants : new insights on Phytochrome A signaling
To identify highly specific components of phytochrome A (PhyA) signaling, a new screening program (SP) was performed. This SP consists of repetitive pulse treatment of 20 minutes red light followed by 20 minutes far-red light. This multiple pulse program was applied to isolate mutants which were …
-
Studies on Structure and Dynamics of Components of Phytochrome Mediated Light Signaling in Plants and Cyanobacteria
From a structural point of view, phytochrome mediated light signaling in plants and bacteria constitutes a scarcely understood system. Albeit the tremendous research activity in the field, no X-ray or NMR-based structural information is available. For the first time now, the crystal structures of …
-
Molecular Genetic Analysis of Cyclic GMP Signaling in Higher Plants
… is regulated by the red/far-red light receptor phytochrome. Moreover, it has become clear that the phytochrome signaling pathway functions within the context of a global regulatory network that exists in plants and permits fine control of a multitude of responses to various environmental …
-
A physiological and genetic analysis of the role of phytochrome in photoperiodic induction of flowering in Arabidopsis Thaliana
… that both a blue light photoreceptor and phytochrome promoted flowering. The induction of flowering by phytochrome was through a HIR mode. Three of the photoreceptor mutants, hy, isolated by Koornneef et al. (1980) were used. In daylength transfer experiments all the hy mutants studied …
-
The transduction of light signals controlling floral induction in Pharbitis nil
… light pulse, acting through the photoreceptor, phytochrome, can cause inhibition of induction, whilst at other time points, a brief light pulse promotes a change in phase of the rhythm. The aim of the research presented in this thesis was to investigate the signal transduction pathway linking …
-
Light Effect on Seed Chlorophyll Content and Germination Performance of Tomato and Muskmelon Seeds
… from tomato cultivar Money Maker and two phytochrome mutants: phytochrome A mutant, fri-1 and phytochrome B mutant, tri-1. The SeedMaster Analyzer (Satake USA Inc., Houston Texas) was used to measure CF and to sort individual seeds according to CF levels. Immature tomato seeds and …
-
Natural Variation in Arabidopsis thaliana Growth in Response to Ambient Temperatures
… identified which harbours the candidate gene PHYTOCHROME B (PHYB). Secondly, fine-mapped ‘Environmental QTL’ were also discovered for the genotype by environment (G x E) interaction. PHYTOCHROME D (PHYD) is a candidate for a temperature-responsiveness QTL. For QTL cloning, functional …
-
Isolation of the aldose reductase gene (XvAld1) from the resurrection plant Xerophyta viscosa, and characterisation of the gene product and transgenic plants expressing the gene
… high or low temperature responses, light and phytochrome responsiveness, wounding, as well as G-box, CAAT and TATA-boxes.
-
Spatiotemporal Control of Actin Cytoskeletal Machinery in Cells: Multivalency Mediated Protein Clustering at the Plasma Membrane and Optogenetic Tool Development
… based on the light-dependent interaction of Phytochrome B (PhyB) and phytochrome interacting factor 3 (Pif3). My method allows subcellular control of protein function via light-induced reconstitution of a split protein. In particular, I show that light-dependent activation of SopE, a …
-
A study of photoperiodic inhibition of flower development in Lemna Persusilla 6746
… interruption, suggesting similar requirements in phytochrome (Pfr) levels for the two phases of flowering.</p><p>Partial flower development occurring in continuous white or red light is further inhibited by an increase in light intensity. Photosynthetic inhibitors, including …
-
Light-sensing in bacteria
… levels. Our results suggest that the PYP-phytochrome hybrid Ppr plays a role as a global regulator of transcription. A BLUF and a bacteriophytochrome on the other hand showed changes in expression levels of a number of genes involved in motility. Lastly, deletion of a LOV domain containing …
-
Genetic dissection of sorghum height and maturity variation using sorghum converted lines and their exotic progenitors
… Two major maturity loci, Ma1 (PRR37) and Ma3 (phytochrome B), and a single major dwarfing locus, Dw3 (PGP1/br2), have been cloned. Sorghum conversion (SC) lines are exotic varieties that have been introgressed with early maturity and dwarfing QTL from a common, temperate-adapted donor using a …
-
Spectroscopic investigation of phytochromes and NIR fluorescent variants
… [IR]) were used for the investigation of phytochromes. Phytochromes are bistable photoreceptor proteins that bind bilins (BV, PCB, PΦB) as chromophores. Various plant, cyanobacterial, and bacterial variants regulate biological processes through the light dependent switching between …
-
Analysis of the regulation of GIGANTEA transcript and protein accumulation in Arabidopsis and recombinant expression
… colours of light and darkness demonstrated that PHYTOCHROME A, ZTL, and CRYPTOCHROME 1 (CRY1) and/or CRY2 are responsible for the regulation of GI mRNA cycling. The same photoreceptors are involved in post-transcriptional regulation of GI, with CRY1 and/or CRY2 seemingly causing de-stabilisation …
-
Development of intermonoploid somatic hybrids of potato and their molecular analysis based on polymorphism for retroelement Tst1
… anther-specific gene, repetitive DNA, and the phytochrome F gene.
Page 1 of 2