Wyniki wyszukiwania

1

4-Hydroxynonenal and oxidative stress in several organelles and its damaging effects on cell functions

100%

Gallo G., Sprovieri P., Martino G.

Journal of Physiology and Pharmacology

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2020

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tom 71

|

nr 1

2

Trafficking of pollen tube organelles along the cytoskeleton

86%

Romagnoli S., Cai G., Cresti M.

Acta Biologica Cracoviensia. Series Botanica. Supplement

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2005

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tom 47

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nr 1

3

The complete structure of the cucumber [Cucumis sativus L.] chloroplast genome: its composition and comparative analysis

86%

Plader W., Yukawa Y., Sugiura M., Malepszy S.

Cellular and Molecular Biology Letters

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2007

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tom 12

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nr 4

584-594

The complete nucleotide sequence of the cucumber (C. sativus L. var. Borszczagowski) chloroplast genome has been determined. The genome is composed of 155,293 bp containing a pair of inverted repeats of 25,191 bp, which are separated by two single-copy regions, a small 18,222-bp one and a large 86,688-bp one. The chloroplast genome of cucumber contains 130 known genes, including 89 protein-coding genes, 8 ribosomal RNA genes (4 rRNA species), and 37 tRNA genes (30 tRNA species), with 18 of them located in the inverted repeat region. Of these genes, 16 contain one intron, and two genes and one ycf contain 2 introns. Twenty-one small inversions that form stem-loop structures, ranging from 18 to 49 bp, have been identified. Eight of them show similarity to those of other species, while eight seem to be cucumber specific. Detailed comparisons of ycf2 and ycf15, and the overall structure to other chloroplast genomes were performed.

4

Mechanical and functional aspects of membrane skeletons

86%

Svetina S., Bozic B., Derganc J., Zeks B.

Cellular and Molecular Biology Letters

|

2001

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tom 06

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nr 2

5

Properties of layered membranes as the basis for membrane fusion and vesiculation processes

86%

Svetina S., Iglic A., Zeks B.

Biophysics of Membrane Transport

|

1994

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tom 12

|

nr 2

6

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

PP2A phosphatase interacts with CPK kinase and regulates pathogenesis responses triggered by intracellular ROS signals

72%

Kangasjarvi S., Denessiouk K., Trotta A., Konert G., Rahikainen M., Li S., Mhamdi A., Noctor G.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2013

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tom 94

|

nr 2

7

Budowa niektorych genow organelli roslinnych

72%

Augustyniak H.

Biotechnologia

|

1993

|

nr 4

118-124

8

Are all red algal parasites cut from the same cloth?

72%

Salomaki E. D., Lane C. E.

Acta Societatis Botanicorum Poloniae

|

2014

|

tom 83

|

nr 4

Parasitism is a common life strategy throughout the eukaryotic tree of life. Many devastating human pathogens, including the causative agents of malaria and toxoplasmosis, have evolved from a photosynthetic ancestor. However, how an organism transitions from a photosynthetic to a parasitic life history strategy remains mostly unknown. This is largely because few systems present the opportunity to make meaningful comparisons between a parasite and a close free-living relative. Parasites have independently evolved dozens of times throughout the Florideophyceae (Rhodophyta), and often infect close relatives. The accepted evolutionary paradigm proposes that red algal parasites arise by first infecting a close relative and over time diversify and infect more distantly related species. This provides a natural evolutionary gradient of relationships between hosts and parasites that share a photosynthetic common ancestor. Elegant microscopic work in the late 20th century provided detailed insight into the infection cycle of red algal parasites and the cellular interactions between parasites and their hosts. Those studies led to the use of molecular work to further investigate the origins of the parasite organelles and reveal the evolutionary relationships between hosts and their parasites. Here we synthesize the research detailing the infection methods and cellular interactions between red algal parasites and their hosts. We offer an alternative hypothesis to the current dogma of red algal parasite evolution and propose that red algae can adopt a parasitic life strategy through multiple evolutionary pathways, including direct infection of distant relatives. Furthermore, we highlight potential directions for future research to further evaluate parasite evolution in red algae.

9

Plastid origin: who, when and why?

72%

Ku C., Roettger M., Zimorski V., Nelsen-Sathi S., Sousa F. L., Martin W. F.

Acta Societatis Botanicorum Poloniae

|

2014

|

tom 83

|

nr 4

The origin of plastids is best explained by endosymbiotic theory, which dates back to the early 1900s. Three lines of evidence based on protein import machineries and molecular phylogenies of eukaryote (host) and cyanobacterial (endosymbiont) genes point to a single origin of primary plastids, a unique and important event that successfully transferred two photosystems and oxygenic photosynthesis from prokaryotes to eukaryotes. The nature of the cyanobacterial lineage from which plastids originated has been a topic of investigation. Recent studies have focused on the branching position of the plastid lineage in the phylogeny based on cyanobacterial core genes, that is, genes shared by all cyanobacteria and plastids. These studies have delivered conflicting results, however. In addition, the core genes represent only a very small portion of cyanobacterial genomes and may not be a good proxy for the rest of the ancestral plastid genome. Information in plant nuclear genomes, where most genes that entered the eukaryotic lineage through acquisition from the plastid ancestor reside, suggests that heterocyst-forming cyanobacteria in Stanier’s sections IV and V are most similar to the plastid ancestor in terms of gene complement and sequence conservation, which is in agreement with models suggesting an important role of nitrogen fixation in symbioses involving cyanobacteria. Plastid origin is an ancient event that involved a prokaryotic symbiont and a eukaryotic host, organisms with different histories and genome evolutionary processes. The different modes of genome evolution in prokaryotes and eukaryotes bear upon our interpretations of plastid phylogeny.

10

Organelle movement in Actinophrys sol and its inhibition by cytochalasin B

72%

Suzaki T., Arikawa M., Saito A., Omura G., Khan S. M. M. K., Sakaguchi M., Hausmann K.

Acta Protozoologica

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2003

|

tom 42

|

nr 1

11

Aggregations of organelles in sporogenesis of Pteridophyta and microsporogenesis of Gymnospermae

72%

Gielwanowska I., Szczuka E.

Bulletin of the Polish Academy of Sciences. Biological Sciences

|

1997

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tom 45

|

nr 2-4

12

Glycogen is metabolized in organelles-glycosomes

72%

Kielan Rybicka K.

Wiadomości Parazytologiczne

|

1998

|

tom 44

|

nr 3

13

Drozdze modelowym organizmem eukariotycznym w biologii molekularnej

58%

Rytka J., Palamarczyk G.

Postępy Biochemii

|

1993

|

tom 39

|

nr 3

152-155

14

Protein translocons in photosynthetic organelles of Paulinella chromatophora

58%

Gagat P., Mackiewicz P.

Acta Societatis Botanicorum Poloniae

|

2014

|

tom 83

|

nr 4

The rhizarian amoeba Paulinella chromatophora harbors two photosynthetic cyanobacterial endosymbionts (chromatophores), acquired independently of primary plastids of glaucophytes, red algae and green plants. These endosymbionts have lost many essential genes, and transferred substantial number of genes to the host nuclear genome via endosymbiotic gene transfer (EGT), including those involved in photosynthesis. This indicates that, similar to primary plastids, Paulinella endosymbionts must have evolved a transport system to import their EGT-derived proteins. This system involves vesicular trafficking to the outer chromatophore membrane and presumably a simplified Tic-like complex at the inner chromatophore membrane. Since both sequenced Paulinella strains have been shown to undergo differential plastid gene losses, they do not have to possess the same set of Toc and Tic homologs. We searched the genome of Paulinella FK01 strain for potential Toc and Tic homologs, and compared the results with the data obtained for Paulinella CCAC 0185 strain, and 72 cyanobacteria, eight Archaeplastida as well as some other bacteria. Our studies revealed that chromatophore genomes from both Paulinella strains encode the same set of translocons that could potentially create a simplified but fully-functional Tic-like complex at the inner chromatophore membranes. The common maintenance of the same set of translocon proteins in two Paulinella strains suggests a similar import mechanism and/or supports the proposed model of protein import. Moreover, we have discovered a new putative Tic component, Tic62, a redox sensor protein not identified in previous comparative studies of Paulinella translocons.

15

Paulinella chromatophora - rethinking the transition from endosymbiont to organelle

58%

Nowack E. C. M.

Acta Societatis Botanicorum Poloniae

|

2014

|

tom 83

|

nr 4

Eukaryotes co-opted photosynthetic carbon fixation from prokaryotes by engulfing a cyanobacterium and stably integrating it as a photosynthetic organelle (plastid) in a process known as primary endosymbiosis. The sheer complexity of interactions between a plastid and the surrounding cell that started to evolve over 1 billion years ago, make it challenging to reconstruct intermediate steps in organelle evolution by studying extant plastids. Recently, the photosynthetic amoeba Paulinella chromatophora was identified as a much sought-after intermediate stage in the evolution of a photosynthetic organelle. This article reviews the current knowledge on this unique organism. In particular it describes how the interplay of reductive genome evolution, gene transfers, and trafficking of host-encoded proteins into the cyanobacterial endosymbiont contributed to transform the symbiont into a nascent photosynthetic organelle. Together with recent results from various other endosymbiotic associations a picture emerges that lets the targeting of host-encoded proteins into bacterial endosymbionts appear as an early step in the establishment of an endosymbiotic relationship that enables the host to gain control over the endosymbiont.

16

Effect of moderate water deficit on calcium level in Sium latifolium L. leaf cells

58%

Nedukha O. M.

Zeszyty Problemowe Postępów Nauk Rolniczych

|

2010

|

tom 545

The distribution and content of calcium ions in organelles, cytoplasm and celi walls of leaf mesophyll and epidermis of Sium latifolium air-water and terrestrial plants at various developmental stage was investigated. It was established that the relative content of Ca2+ in cells changed in relation to growth stage and environmental growth conditions. Moderate water deficit led to the increase of calcium content in chloroplasts and nucleus of palisade mesophyll, and in cell walls of adaxial epidermis of plants that were collected at flowering phase. At fruitage stage, water deficit led to the decrease of Ca2+ in chloroplasts and in cytoplasm of mesophyll cells and in cell walls of epidermis. The obtained results show that these data can be used as a basis for future studies on the mechanisms of calcium redistribution and the role of ion channels in plant cells under water deficit.

17

Influence of environmental changes on physiology and development of polar vascular plant

58%

Gielwanowska I., Pastorczyk M., Kellmann-Sopyla W.

Papers on Global Change

|

2011

|

nr 18

Polar vascular plants native to the Arctic and the Antarctic geobotanical zone have been growing and reproducing effectively under difficult environmental conditions, colonizing frozen ground areas formerly covered by ice. Our macroscopic observations and microscopic studies conducted by means of a light microscope (LM) and transmission electron microscope (TEM) concerning the anatomical and ultrastructural observations of vegetative and generative tissue in Cerastium arcticum, Colobanthus quitensis, Silene involucrata, plants from Caryophyllaceae and Deschampsia antarctica, Poa annua and Poa arctica, from Poaceae family. In the studies, special attention was paid to plants coming from diversity habitats where stress factors operated with clearly different intensity. In all examinations plants, differences in anatomy were considerable. In Deschampsia antarctica the adaxial epidermis of hairgrass leaves from a humid microhabitat, bulliform cells differentiated. Mesophyll was composed of cells of irregular shapes and resembled aerenchyma. The ultrastructural observations of mesophyll in all plants showed tight adherence of chloroplasts, mitochondria and peroxisomes, surface deformations of these organelles and formation of characteristic outgrowths and pocket concavities filled with cytoplasm with vesicles and organelles by chloroplasts. In reproduction biology of examined Caryophyllaceae and Poaceae plants growing in natural conditions, in the Arctic and in the Antarctic, and in a greenhouse in Olsztyn showed that this plant develops two types of bisexual flowers. Almost all ovules developed and formed seeds with a completely differentiated embryo both under natural conditions in the Arctic and the Antarctic and in a greenhouse in Olsztyn.

18

Microtubule patterns and organelles during microsporogenesis in apomictic Chondrilla juncea L.

58%

Koscinska-Pajak M., Bednara J.

Acta Biologica Cracoviensia. Series Botanica

|

2003

|

tom 45

|

nr 2

This study investigated patterns of cytoskeletal organization during microsporogenesis in Chondrilla juncea L., an autonomous apomict with a triploid chromosome number (2n = 15). The distribution of microtubules and organelles is not typical. The microtubules do not form a normal phragmoplast and consequently the organelle equatorial plate observed in many taxons is not present. The organelles are dispersed randomly in both the central and peripheral parts of the cytoplasm.

19

Characterization of plant genomes using fluorescence in situ hybridization

58%

Fuchs J., Schubert I.

Prace Naukowe Uniwersytetu Śląskiego w Katowicach

|

1998

|

tom 1696

20

The involvement of organelles in plant sexual reproduction: A post-genomic approach

58%

Berthome R., Froger N., Hiard S., Balasse H., Martin-Canadell A., Budar F.

Acta Biologica Cracoviensia. Series Botanica

|

2003

|

tom 45

|

nr 1

To study mitochondria and plastid involvement in plant development, particularly in sexual reproduction, we made use of the Arabidospis thaliana T-DNA insertion collection developed in Versailles. Mutants affected in the nuclear genes that encode proteins predicted to be targeted to organelles were identified using two complementary strategies. In the first (forward genetics), mutants chosen for their sterile or gametophytic lethal phenotype were screened for T-DNA insertion in genes encoding mitochondrial or plastid proteins after systematic sequencing of the Flanking Sequence Tag (FST). The second (reverse genetics) enabled us to identify other mutants using the following tools: systematic A. thaliana proteome analysis, bioinformatics software to predict the sub-cellular localization of putative proteins, and the FST sequencing program FlagDB. Preliminary results for the first set of 82 putative mutants are presented and discussed.

Ograniczanie wyników

4-Hydroxynonenal and oxidative stress in several organelles and its damaging effects on cell functions

Trafficking of pollen tube organelles along the cytoskeleton

The complete structure of the cucumber [Cucumis sativus L.] chloroplast genome: its composition and comparative analysis

Mechanical and functional aspects of membrane skeletons

Properties of layered membranes as the basis for membrane fusion and vesiculation processes

PP2A phosphatase interacts with CPK kinase and regulates pathogenesis responses triggered by intracellular ROS signals

Budowa niektorych genow organelli roslinnych

Are all red algal parasites cut from the same cloth?

Plastid origin: who, when and why?

Organelle movement in Actinophrys sol and its inhibition by cytochalasin B

Aggregations of organelles in sporogenesis of Pteridophyta and microsporogenesis of Gymnospermae

Glycogen is metabolized in organelles-glycosomes

Drozdze modelowym organizmem eukariotycznym w biologii molekularnej

Protein translocons in photosynthetic organelles of Paulinella chromatophora

Paulinella chromatophora - rethinking the transition from endosymbiont to organelle

Effect of moderate water deficit on calcium level in Sium latifolium L. leaf cells

Influence of environmental changes on physiology and development of polar vascular plant

Microtubule patterns and organelles during microsporogenesis in apomictic Chondrilla juncea L.

Characterization of plant genomes using fluorescence in situ hybridization

The involvement of organelles in plant sexual reproduction: A post-genomic approach