Colobanthus quitensis
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA388703 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Colobanthus quitensis Organism overview
| PRJNA267165 | ENA
Project description:Colobanthus quitensis Transcriptome or Gene expression
| PRJNA266913 | ENA
Project description:Colobanthus quitensis Transcriptome or Gene expression
| PRJNA268301 | ENA
Project description:Colobanthus quitensis Transcriptome or Gene expression
| PRJNA266912 | ENA
Project description:Global warming is strongly affecting the Maritime Antarctica climate and the consequent melting of perennial snow and ice covers resulted in increased colonization by plants. Colobanthus quitensis is a vascular plant highly adapted to the harsh environmental conditions of Antarctic Peninsula and understanding how the plant is responding to global warming is a new challenging target for modern cell physiology. To this aim, we performed differential proteomic analysis on C. quitensis plants grown in natural conditions compared to plants grown for one year inside Open Top Chambers (OTCs) which determine an increase of about 4 °C at midday, mimicking the effect of global warming. A thorough analysis of the up- and down-regulated proteins highlighted an extensive metabolism reprogramming leading to the hypothesis that (i) photorespiration could play an important role in reducing ROS-mediated photodamage improving OTC plants protection against photoinhibition; (ii) OTC plants activate stronger antioxidant defenses as confirmed by enzymatic activity and TBARS content measurement; (iii) the deposition of cell wall components is impaired in OTC plants due to the down-regulation of many enzymes involved in their biosyn-thesis; (iv) OTC plants could suffer of a reduced freezing tolerance due to lower concentration of soluble sugars acting as osmoprotectants.
2021-07-26 | PXD027038 | Pride
Project description:Due to the progressive environmental change that the Antarctic Peninsula has undergone over time, a more comprehensive overview of the metabolic features of Colobanthus quitensis becomes particularly interesting to assess its ability to respond to environmental stresses. To this end, a differential proteomic approach has been used to study the response of C. quitensis to different environmental cues.
2023-03-11 | PXD037324 | Pride
Project description:Calcium oxalate (CaOx) crystals are widespread among plant species. Their functions are not yet completely understood; however, they can provide tolerance against multiple environmental stress factors. Recent evidence suggested that CaOx crystals function as carbon reservoirs since its decomposition provides CO2 that may be used as carbon source for photosynthesis. This might be advantageous in plants with reduced mesophyll conductance, such as the Antarctic plant Colobanthus quitensis, which have shown CO2 diffusion limitations. In this study, we evaluate the effect of two CO2 concentrations in the CaOx crystals decomposition and chlorophyll fluorescence of C. quitensis. Plants were exposed to airflows with 400 ppm and 11.5 ppm CO2 and the number and relative size of crystals, electron transport rate (ETR), and oxalate oxidase (OxO) activity were monitored along time (10 h). Here we showed that leaf crystal area decreases over time in plants with 11.5 ppm CO2, which was accompanied by increased OxO activity and only a slight decrease in the ETR. These results suggested a relation between CO2 limiting conditions and the CaOx crystals decomposition in C. quitensis. Hence, crystal decomposition could be a complementary endogenous mechanism for CO2 supply in plants facing the Antarctic stressful habitat.
| S-EPMC7600318 | biostudies-literature
Project description:Because so few viruses in the family Barnaviridae have been reported, we searched for more of them in public sequence databases. Here, we report the complete coding sequence of Colobanthus quitensis associated barnavirus 1, mined from a transcriptome of the Antarctic pearlwort Colobanthus quitensis. The 4.2-kb plus-strand sequence of this virus encompasses four main open reading frames (ORFs), as expected for barnaviruses, including ORFs for a protease-containing polyprotein, an RNA-dependent RNA polymerase whose translation appears to rely on - 1 ribosomal frameshifting, and a capsid protein that is likely to be translated from a subgenomic RNA. The possible derivation of this virus from a fungus associated with C. quitensis is discussed.
| S-EPMC5999160 | biostudies-literature
Project description:The presence of calcium oxalate (CaOx) crystals has been widely reported in the plant kingdom. These structures play a central role in various physiological functions, including calcium regulation, metal detoxification, and photosynthesis. However, precise knowledge about their possible roles and functions in plants is still limited. Therefore, the present work aims to study the ecotypic variability of Colobanthus quitensis, an extremophile species, concerning CaOx crystal accumulation. The CaOx crystals were studied in leaves of C. quitensis collected from different provenances within a latitudinal gradient (From Andes mountains in central Chile to Antarctica) and grown under common garden conditions. Polarized light microscopy, digital image analysis, and electron microscopy were used to characterize CaOx crystals. The presence of CaOx crystals was confirmed in the four provenances of C. quitensis, with significant differences in the accumulation among them. The Andean populations presented the highest accumulation of crystals and the Antarctic population the lowest. Electron microscopy showed that CaOx crystals in C. quitensis are classified as druses based on their morphology. The differences found could be linked to processes of ecotypic differentiation and plant adaptation to harsh environments.
| S-EPMC8470922 | biostudies-literature