Jürgens, Sascha-René

[["dc.bibliographiccitation.firstpage","531"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Annals of Botany"],["dc.bibliographiccitation.lastpage","539"],["dc.bibliographiccitation.volume","101"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Jürgens, Sascha-René"],["dc.contributor.author","Brinkmann, Martin"],["dc.contributor.author","Herminghaus, Stephan"],["dc.date.accessioned","2017-09-07T11:51:56Z"],["dc.date.available","2017-09-07T11:51:56Z"],["dc.date.issued","2007"],["dc.description.abstract","† Background and Aims The superhydrophobicity of the thallus surface in one of the most SO2-tolerant lichenspecies, Lecanora conizaeoides, suggests that surface hydrophobicity could be a general feature of lichen symbiosescontrolling their tolerance to SO2. The study described here tests this hypothesis.† Methods Water droplets of the size of a raindrop were placed on the surface of air-dry thalli in 50 lichen species ofknown SO2 tolerance and contact angles were measured to quantify hydrophobicity.† Key Results The wettability of lichen thalli ranges from strongly hydrophobic to strongly hydrophilic. SO2 toleranceof the studied lichen species increased with increasing hydrophobicity of the thallus surface. Extraction ofextracellular lichen secondary metabolites with acetone reduced, but did not abolish the hydrophobicity of lichenthalli.†Conclusions Surface hydrophobicity is the main factor controlling SO2 tolerance in lichens. It presumably originallyevolved as an adaptation to wet habitats preventing the depression of net photosynthesis due to supersaturationof the thallus with water. Hydrophilicity of lichen thalli is an adaptation to dry or humid, but not directly rainexposedhabitats. The crucial role of surface hydrophobicity in SO2 also explains why many markedly SO2-tolerantspecies are additionally tolerant to other (chemically unrelated) toxic substances including heavy metals."],["dc.identifier.doi","10.1093/aob/mcm306"],["dc.identifier.gro","3146226"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/3984"],["dc.language.iso","en"],["dc.notes.status","public"],["dc.notes.submitter","chake"],["dc.relation.issn","0305-7364"],["dc.title","Surface Hydrophobicity Causes SO2 Tolerance in Lichens"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]