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 35 for “"Plastids"”.
-
Gene expression in plastids of higher plants: evolutionary and functional aspects of different RNA polymerases - coordinated assembly of multiprotein-complexes
… how far the transcriptional apparatus within plastids was adapted to nuclear needs, three approaches have been undertaken. Firstly, the tobacco homologues of the NEP-enzymes known from Arabidopsis were determined and characterised. Secondly, an extensive transcript analysis for all plastid …
-
Feeding, Dark Survival, and Foreign Organelle Retention in an Antarctic Dinoflagellate
The retention by protists of foreign plastids and other organelles obtained from algal prey is an ecologically important example of mixotrophy and also represents a potential pathway for the symbiogenetic evolution of novel permanent plastids. A gymnodinoid dinoflagellate isolated from the Ross …
-
Coevolution of plastid genomes and transcript processing pathways in photosynthetic alveolates
Following their endosymbiotic uptake, plastids undergo profound changes to genome content and to their associated biochemistry. I have investigated how evolutionary transitions in plastid genomes may impact on biochemical pathways associated with plastid gene expression, focusing on the highly …
-
THE ORIGIN OF THE DINOFLAGELLATE PLASTID
… between haptophyte and dinoflagellate plastids, while the nuclear-encoded genes suggest a relationship with heterokonts. Chromophyte plastid monophyly is supported by these data but the single origin of the chromophyte plastid from red algae does not mean that the host lineages are …
-
An investigation into the chloroplast transformation of wheat, and the use of a cyanobacterial CCM gene for improving photosynthesis in a C3 plant
… targets are absent of metabolically active plastids. This study has developed a robust regeneration protocol for a previously undescribed tissue, termed the primary inflorescence leaf sheath (piLS), which is rich in active chloroplasts. Functional wheat specific chloroplast transformation …
-
Improved plastid transformation in Marchantia polymorpha
Plastids are subcellular organelles which perform photosynthesis in plants and algae. They are descended from free-living photosynthetic bacteria which were engulfed by early eukaryotes ~1.5 billion years ago. Nearly all plastids retain a small genome separate from the nuclear genome of the plants …
-
ΜΕΛΕΤΗ ΤΟΥ ΦΛΟΙΩΜΑΤΟΣ ΣΤΟ ΑΓΡΩΣΤΩΔΕΣ ΦΥΤΟ AEGILOPS COMOSA VAR THESSALICA ΣΕ ΕΠΙΠΕΔΟ ΟΠΤΙΚΗΣ ΚΑΙ ΗΛΕΚΤΡΟΝΙΚΗΣ ΜΙΚΡΟΣΚΟΠΙΑΣ
… IN WHICH MICROTUBULES PLAY A SIGNIFICANT ROLE. PLASTIDS DEVELOP CUNEATE CRYSTALLOID INCLUSIONS OFPROTEINASES COMPOSITION AND PROVIDE THE INITIAL INDICATION OF DIFFERENTIATIONONSET. MATURE SIEVE ELEMENTS ARE DEVOID OF FUNCTIONAL NUCLEUS, ORGANIZED CYTOPLASM, RIBOSOMES, DICTYOSOMES, MICROTUBULES …
-
A DNA Determination in Developing Chick Marginal Tissue
… and Miller, 1966; Chevremont et al., 1960), plastids (Chun et al., 1963; Gibor and Granick, 1964), and as distinct particles in the cytoplasm (Rabinovitch and Plaut, 1962; Prescott et al., 1962).
-
Can Plant Plastid Produce a Candidate Influenza Vaccine?
… the A/Sichuan/2/87 H3N2 influenza subtype in plastids achieved HA gene transcription but no protein accumulation, suggesting that the HA protein may be unstable in the plastid. The aim of this work is to investigate alternative strategies that might achieve HA antigen accumulation in plastids. …
-
ΜΕΛΕΤΗ ΜΕ ΤΟ ΟΠΤΙΚΟ ΚΑΙ ΤΟ ΗΛΕΚΤΡΟΝΙΚΟ ΜΙΚΡΟΣΚΟΠΙΟ ΤΗΣ ΚΑΡΠΟΣΠΟΡΙΟΓΕΝΕΣΗΣ ΣΤΟ ΘΑΛΑΣΣΙΟ ΡΟΔΟΦΥΚΟΣ GRACILARIA VERRUCOSA (HUDSON) PAPENFUSS
… LARGE NUCLEUS, FEW STARCH GRAINS, AS WELL AS PROPLASTIDSWITH A PERIPHERAL THYLAKOID. THE SECOND STAGE CARPOSPORES ARE REORGANIZED BYTHE INCREASED NUMBERS OF STARCH GRAINS, THE FORMATION OF SMALL STRAIGHT-PROFILED DICTROSOMES WHICH PRODUCE CARPOSPORE WALL MATERIAL AND THE PRESENCE OF DARK-STAINING …
-
Control of Substrate Supply to the Chloroplast 2-C-methyl-D-erythritol-4-phosphate Pathway
… metabolism of the cyanobacterial ancestors of plastids, resulting in the absence of key ED pathway genes in endosymbiont genomes of plants. This conclusion partly rests on clarifying the distinct biochemical functions of two highly similar protein classes. One is present in both prokaryotes and …
-
Phosphatidylglycerophosphat-Synthasen aus Arabidopsis thaliana
… PGPS1 is imported into both Mitochondria and plastids. Moreover, it seems likely that phosphatidylglycerol can be imported into mitochondria from the endomembranes of A. thaliana.
-
Investigating the Role of RAP2.12 and GAPDH in Photosynthetic CO2 Fixation to Improve Drought Tolerance
… been revealed that the relative amounts of GAPDH plastids subunit (A2B2) and (A4) vary between species, but almost always the A2B2 form is predominant (Howard et al., 2011b). Previously, plants without A4 have been recognised, but no plants without A2B2 have been identified. The second hypothesis …
-
Functional analysis of the CP12 gene family in Arabidopsis
… they may have a wider role in non-photosynthetic plastids through the plants’ life cycle and that their function may not be restricted to the Calvin-Benson cycle. The main aim of this study was to determine the functional significance of having three CP12 isoforms and to explore the importance of …
-
Characterization of plant tocopherol cyclases
… proceeds at the inner envelope membrane of plastids. In the tocopherol biosynthetic pathway, tocopherol cyclase (TC) catalyses the key step in the biosynthesis of the chromanol substructure of the vitamin E family. To investigate the role of TC in the tocopherol biosynthesis, the present …
-
Illuminating Organellar and Molecular Organization of the Endomembrane System
… in a eukaryotic cell, except mitochondria and plastids. Different compartments in the endomembrane system communicate with each other through vesicular transport as well as direct membrane-membrane contact. In this work, I first probe spatial organization of membrane contact sites between the …
-
Genomic Organization of Fatty Acid Desaturase-2 (Fad2 ) and Fatty Acid Desaturase-6 (Fad6) ESTs in Maize
… of oleic acid to linoleic acids in the plastids in plants. Expressed Sequence Tag (EST) clones from putative maize homologs for fad2 and fad6 have been identified. The maize fad2 ESTs showed an amino acid homology of 67--77% to fad2 of Soybean, Arabidopsis and Brassica species. The maize …
Page 1 of 2