Joana R. Expósito

Joana R. Expósito
King Juan Carlos University | URJC · Biology and Geology

PhD student

About

6
Publications
947
Reads
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18
Citations
Additional affiliations
November 2016 - November 2021
King Juan Carlos University
Position
  • PhD Student
October 2015 - June 2016
Universidad Autónoma de Madrid
Position
  • Master's Student
September 2011 - July 2015
King Juan Carlos University
Position
  • Student

Publications

Publications (6)
Chapter
Lichens are symbiotic organisms constituted by heterotrophic fungi (the main mycobiont and minority yeasts), photosynthetic partners (photobionts), either cyanobacteria (cyanobionts) or green microalgae (phycobionts), and bacterial consortia. Due to that, the holobiont is ruled by several coordinated genomes from different kingdoms (super-clades)....
Article
Full-text available
Lichen desiccation/rehydration cycles lead to an increased oxidative stress modulated by the multifaceted mediator nitrogen monoxide (NO). Active cell death, frequently triggered by oxidative damage with NO participation, has been confirmed even in unicellular organisms. This adaptive mechanism has not been studied in lichens and no specific experi...
Article
Full-text available
Lichens undergo desiccation/rehydration cycles and are permeable to heavy metals, which induce free radicals. Nitrogen monoxide (NO) regulates important cellular functions, but the research on lichen NO is still very scarce. In Ramalina farinacea thalli, NO seems to be involved in the peroxidative damage caused by air pollution, antioxidant defence...
Chapter
Full-text available
Lichens are symbiotic organisms, originated by mutualistic associations of heterotrophic fungi (mycobiont), photosynthetic partners (photobionts) which can be either cyanobacteria (cyanobionts) or green microalgae (phycobionts), and bacterial consortia. They are poikilohydric organisms without cuticles or nutrient absorption organs adapted to anhyd...
Article
Full-text available
Lichens are poikilohydrous symbiotic associations between a fungus, photosynthetic partners, and bacteria. They are tolerant to repeated desiccation/rehydration cycles and adapted to anhydrobiosis. Nitric oxide (NO) is a keystone for stress tolerance of lichens; during lichen rehydration, NO limits free radicals and lipid peroxidation but no data o...

Projects

Project (1)
Project
Characterization of NO in Ramalina farinacea