Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Background: In field, C. quitensis is subjected to many abiotic extreme environmental conditions, such as low temperatures, high UV-B, salinity and reduced water potentials, but not metal or metalloid high concentrations in soil, however, other members of Caryophyllaceae family have tolerance to high concentrations of metals, this is the case of Silene genre. In this work, we hypothesize that C. quitensis have the same mechanisms of Silene to tolerate metals, involving accumulation and induction of antioxidant systems, sugar accumulation and the induction of thiols such as phytochelatins to tolerate.
Results: The results showing an effective antioxidant defensive machinery involving non-enzymatic antioxidants such as phenolics, GSH and ascorbic acid, in another hand, GSH-related oligomers (phytochelatins) and sugars was induced as a defensive mechanism.
Conclusions: Colobanthus quitensis exhibits certain mechanisms to tolerate copper in vitro demonstrating its plasticity to tolerate several abiotic stress conditions.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6234666 | PMC |
| http://dx.doi.org/10.1186/s40659-018-0197-0 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Vernalization of Winter Crops Increases Photosynthetic Energy Conversion Efficiency and Seed Yield.
Plants (Basel)
July 2025
Department of Biology, Western University, 1151 Richmond St., London, ON N6A 3K7, Canada.
We summarize our present knowledge of the regulation of photostasis and photosynthetic performance versus photoprotection in response to vernalization and conclude that the enhanced photosynthetic performance of winter crops is due to an inherent increase in photosynthetic energy conversion efficiency induced by vernalization which translates into high seed yield in the field as well as under controlled environment conditions. This is consistent with the published data for enhanced photosynthetic performance of the only two extant terrestrial angiosperms, and , native to the frigid conditions of terrestrial Antarctica. The Cold Binding factor family of transcription factors (CBFs/DREBs) governs the enhanced photosynthetic performance of winter cereals as well as the Antarctic angiosperms.
View Article and Find Full Text PDFAccelerated aging in Colobanthus quitensis seeds: understanding stress responses in an extremophile species.
Planta
July 2025
Laboratorio de Biotecnología y Estudios Ambientales, Departamento de Ciencias y Tecnología Vegetal, Escuela de Ciencias y Tecnologías, Universidad de Concepción, Los Ángeles, Chile.
Accelerated aging effectively evaluates Colobanthus quitensis seed quality, revealing that deterioration reduces germination performance and total sugars, while increasing indole-3-acetic acid levels, indicating physiological decline. Seed deterioration affects all species and presents a major challenge for the management of germplasm banks. Colobanthus quitensis is one of the two extremophile vascular species native to Antarctica and is recognized for its biotechnological potential in environmental stress studies and as a bioindicator of climate change.
View Article and Find Full Text PDFA Double Edge-Sword in Antarctica: In Situ Passive Warming Exacerbates Drought and Heat Stress Differentially in the Native Vascular Species.
Physiol Plant
July 2025
Laboratorio de Fisiología y Biología Molecular Vegetal, Dpt. de Cs. Agronómicas y Recursos Naturales, Facultad de Cs. Agropecuarias y Medioambiente, Instituto de Agroindustria, Universidad de La Frontera, Temuco, Chile.
We investigated the impact of open-top chamber (OTC) passive warming systems at molecular and ecophysiological levels on Deschampsia antarctica (DA) and Colobanthus quitensis (CQ) in Antarctica. In this field campaign, OTC led to more benign conditions early in the growing season but ultimately intensified drought stress and increased extreme heat events, affecting photosynthetic capacity, metabolism and dehydration tolerance in DA; however, CQ remained relatively unaffected. DA exhibited significant reductions in photosynthesis primarily due to stomatal and mesophyll limitations.
View Article and Find Full Text PDFTranscriptomic responses of Antarctic plants to in situ warming: Uncovering molecular mechanisms behind physiological adjustments.
Ann Bot
June 2025
Division of Life Sciences, Korea Polar Research Institute, Incheon, Republic of Korea.
Background And Aims: Previous studies using open-top chambers to simulate warming in Antarctic field conditions have shown distinct physiological responses between the two Antarctic vascular plants Colobanthus quitensis and Deschampsia antarctica. While C. quitensis exhibited significantly increased photosynthetic capacity and growth under in situ warming conditions, D.
View Article and Find Full Text PDFRhizosphere and soil metagenomes and metagenome-assembled genomes from the Byers Peninsula, Livingston Island (62°S), Antarctica.
Microbiol Resour Announc
July 2025
Departamento de Microbiología, Facultad de Ciencias de la Salud, Universidad de Talca, Campus Talca, Talca, Chile.
Rhizosphere microbes establish functional interactions with their hosts, impacting plant fitness. To further understand plant effects on microbial composition and functional diversity, we present 52 metagenomes and 1,484 metagenome-assembled genomes (MAGs) from soil and the rhizosphere of and .
View Article and Find Full Text PDF