6533b836fe1ef96bd12a0984

RESEARCH PRODUCT

The organic air pollutant cumene hydroperoxide interferes with NOantioxidant role in rehydrating lichen

Myriam CataláFrancisco GasullaJosé Reig-armiñanaA.e. Pradas Del RealEva BarrenoFrancisco J. García-breijoFrancisco J. García-breijo

subject

TrebouxiaChlorophyllAntioxidantLichensHealth Toxicology and Mutagenesismedicine.medical_treatmentBOTANICAToxicologymedicine.disease_causePhotosynthesisRamalina farinaceaLipid peroxidationchemistry.chemical_compoundBotanymedicineBenzene DerivativesDesiccationPhotosynthesisVolatile organic pollutantsBIOLOGIA VEGETALAir PollutantsbiologyDehydrationROSNitric oxideGeneral Medicinebiology.organism_classificationPollutionOxidative StressBiochemistrychemistryCumene hydroperoxideChlorophyllTrebouxiaNitrogen OxidesOxidation-ReductionOxidative stress

description

Organic pollutants effects on lichens have not been addressed. Rehydration is critical for lichens, a burst of free radicals involving NO occurs. Repeated dehydrations with organic pollutants could increase oxidative damage. Our aim is to learn the effects of cumene hydroperoxide (CP) during lichen rehydration using Ramalina farinacea (L.) Ach., its photobiont Trebouxia spp. and Asterochloris erici. Confocal imaging shows intracellular ROS and NO production within myco and phycobionts, being the chloroplast the main source of free radicals. CP increases ROS, NO and lipid peroxidation and reduces chlorophyll autofluorescence, although photosynthesis remains unaffected. Concomitant NO inhibition provokes a generalized increase of ROS and a decrease in photosynthesis. Our results suggest that CP induces a ompensatory hormetic response in Ramalina farinacea that could reduce the lichen s antioxidant resources after repeated desiccation-rehydration cycles. NO is important in the protection from CP.

yearjournalcountryeditionlanguage
2013-08-01
10.1016/j.envpol.2013.04.015https://hdl.handle.net/10251/45168