Blackmeristematicfungicansurvivehighdosesofradiationandareresistanttodesiccation.Theseadaptationshelpthemtocolonizeharsholigotrophichabitats,e.g.,onthesurfaceandsubsurfaceofrocks.Oneoftheirmostcharacteristicstress-resistancemechanismsistheaccumulationofmelanininthecellwalls.This,productionofotherprotectivemoleculesandaplasticmorphologyfurthercontributetoecologicalflexibilityofblackfungi.Increasedgrowthratesofsomespeciesafterexposuretoionizingradiationevensuggestyetunknownmechanismsofenergyproduction.OtherunusualmetabolicstrategiesmayincludeharvestingUVorvisiblelightorgainingenergybyformingfacultativelichen-likeassociationswithalgaeorcyanobacteria.Thelatterisnotentirelysurprising,sincecertainblackfungallineagesarephylogeneticallyrelatedtocladesoflichen-formingfungi.Similartoblackfungi,lichen-formingfungiareadaptedtogrowthonexposedsurfaceswithlowavailabilityofnutrients.Theyalsoefficientlyuseprotectivemoleculestotoleratefrequentperiodsofextremestress.Traitssharedbybothgroupsoffungimayhavebeenimportantinfacilitatingtheevolutionandradiationoflichen-symbioses.
Titolo: | Polyextremotolerant black fungi: oligotrophism, adaptivepotential, and a link to lichen symbioses. | |
Autori: | ||
Data di pubblicazione: | 2012 | |
Rivista: | ||
Abstract: | Blackmeristematicfungicansurvivehighdosesofradiationandareresistanttodesiccation.Theseadaptationshelpthemtocolonizeharsholigotrophichabitats,e.g.,onthesurfaceandsubsurfaceofrocks.Oneoftheirmostcharacteristicstress-resistancemechanismsistheaccumulationofmelanininthecellwalls.This,productionofotherprotectivemoleculesandaplasticmorphologyfurthercontributetoecologicalflexibilityofblackfungi.Increasedgrowthratesofsomespeciesafterexposuretoionizingradiationevensuggestyetunknownmechanismsofenergyproduction.OtherunusualmetabolicstrategiesmayincludeharvestingUVorvisiblelightorgainingenergybyformingfacultativelichen-likeassociationswithalgaeorcyanobacteria.Thelatterisnotentirelysurprising,sincecertainblackfungallineagesarephylogeneticallyrelatedtocladesoflichen-formingfungi.Similartoblackfungi,lichen-formingfungiareadaptedtogrowthonexposedsurfaceswithlowavailabilityofnutrients.Theyalsoefficientlyuseprotectivemoleculestotoleratefrequentperiodsofextremestress.Traitssharedbybothgroupsoffungimayhavebeenimportantinfacilitatingtheevolutionandradiationoflichen-symbioses. | |
Handle: | http://hdl.handle.net/11368/2735501 | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.3389/fmicb.2012.00390 | |
Appare nelle tipologie: | 1.1 Articolo in Rivista |