Parmotrema hydrium, a new species of Parmeliaceae in southeastern Brazil

Benatti, Michel Navarro; Gernert, Maria; Schmitt, Imke

doi:10.1590/s0102-33062013000400021

Cited by 14 publications

(12 citation statements)

References 10 publications

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“…Chemical constituents were checked by spot tests with potassium hydroxide (K), sodium hypochlorite (C) and para-phenylenediamine (P), and also examined under UV light (360 nm). Since a single, relatively small specimen was available for observation, chemical constituents were first analyzed using HPLC, following the same procedures described in detail at Benatti et al (2013), followed by TLC, solvent A. Thallus fragments up to 4.5 cm wide, membranaceous, corticolous, greenish gray, lobate. Lobes irregularly branched, (0.5−) 1.0−2.5 (−3.5) mm wide, contiguous to overlapping laterally, adnate, loosely attached.…”

Section: Methodsmentioning

confidence: 99%

Canoparmelia pustulifera, a new species of Parmeliaceae containing perlatolic acid from Southern Brazil

et al. 2017

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-Canoparmelia pustulifera Benatti, S.M. Martins, Vos & Holt is a new lichen species discovered during a trip near Parque Estadual de Itapuã, in Rio Grande do Sul State, Southern Brazil. The species is the second pustulate Canoparmelia species discovered after C. albomaculata, and contains perlatolic acid and several other still-undetermined medullary substances. Palvras-chave:Canoparmelia caroliniana, maculae, pustulae, soredia RESUMO -Canoparmelia pustulifera, uma nova espécie de Parmeliaceae contendo ácido perlatólico do Sul do Brasil. Canoparmelia pustulifera Benatti, S.M. Martins, Vos & Holt é uma nova espécie de líquen descoberta durante uma expedição próxima ao Parque Estadual de Itapuã, Estado do Rio Grande do Sul, Região Sul do Brasil. É a segunda espécie pustulada de Canoparmelia descoberta, após C. albomaculata, e contém ácido perlatólico além de diversas outras substâncias medulares indeterminadas .

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Section: Methodsmentioning

confidence: 99%

Canoparmelia pustulifera, a new species of Parmeliaceae containing perlatolic acid from Southern Brazil

et al. 2017

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“…On the Pyramid, the inhibitory effects-which are more evident on the borders of some tracks-can be explained considering the higher and more recent metabolic activity in the younger peripheral parts of thalli [60]. A complementary hypothesis is that the previous surface colonisation and the related hyphal penetration and chemical deterioration (e.g., by oxalic acid) may have predominantly modified the stone substrate and increased its bioreceptivity in the parts covered by the oldest parts of the thallus [61], prevailing on the inhibitory effect.…”

Section: Hypothesis On the Aetiological Agent Of The Tracksmentioning

confidence: 99%

Biodeterioration Patterns and Their Interpretation for Potential Applications to Stone Conservation: A Hypothesis from Allelopathic Inhibitory Effects of Lichens on the Caestia Pyramid (Rome)

et al. 2020

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The colonisation of stone by different organisms often leaves biodeterioration patterns (BPs) on the surfaces even if their presence is no longer detectable. Peculiar weathering patterns on monuments and rocks, such as pitting phenomena, were recognised as a source of information on past colonisers and environmental conditions. The evident inhibition areas for new bio-patinas observed on the marble blocks of the Caestia Pyramid in Rome, recognisable as tracks of previous colonisations, seem a source for developing new natural products suitable for restoration activities. To hypothesise past occurring communities and species, which gave rise to such BPs, we carried out both in situ observations and analyses of the rich historical available iconography (mainly photographs). Moreover, we analysed literature on the lichen species colonising carbonate stones used in Roman sites. Considering morphology, biochemical properties and historical data on 90 lichen species already reported in Latium archaeological sites, we suppose lichen species belonging to the genus Circinaria (Aspicilia s.l.) to be the main aetiological agent of such peculiar BPs. These results seem relevant to highlight the long-lasting allelopathic properties of some lichen substances potentially applicable as a natural product to control colonisation, improving the environmental and economical sustainability of stone restoration.

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“…The detection of compounds was done using OpenLAB CDS ChemStation software (Agilent Technologies) by comparing spectra and retention time against a library of spectra from authentic metabolites. For more details see [50] …”

Section: High-performance Liquid Chromatographymentioning

confidence: 99%

Chemosyndrome Variation in Mycobiont Culture and Thallus of <em>Parmelina carporrhizans</em> and <em>Parmelina quercina</em>

Alors¹,

Divakar²,

Anjuli³

et al. 2017

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Abstract:We cultured Parmelina carporrhizans and P. quercina in Corn Meal Agar and 0.2% glucose Malt Yeast Agar for 160 days. Chemosyndrome of natural thalli and mycobiont cultures were analyzed by HPLC. Lecanoric acid, atranorin, chloratranorin and ergosterol were detected in P. carporrhizans thalli, while lecanoric acid, chloratranorin and aliphates were found in P. quercina thalli. The secondary methabolites pattern between thalli and mycobiont culture was completely different in both species. Both species secreted the phenalenone myeloconone C in culture media and was also detected in P. quercina mycobiont aggregates. Interestingly, the phenolic compounds produced by the mycobiont culture of P. carporrhizans are related to those produced by natural thallus by the same biosynthetic pathway, while the chemosyndrome of P. quercina mycobiont implies switch of biosynthetic pathway from acetate-polymalonate pathway to shikimic acid pathway, with pulvinic acid as major compound of mycobiont culture. The role of Myelochonone C, confluentic acid and pulvinic acid produced by mycobiont culture is discussed as possible adaptive vantage in field as photoprotective agent or as byproduct result of stressing artificial culture conditions.

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Parmotrema hydrium, a new species of Parmeliaceae in southeastern Brazil

Cited by 14 publications

References 10 publications

Canoparmelia pustulifera, a new species of Parmeliaceae containing perlatolic acid from Southern Brazil

Canoparmelia pustulifera, a new species of Parmeliaceae containing perlatolic acid from Southern Brazil

Biodeterioration Patterns and Their Interpretation for Potential Applications to Stone Conservation: A Hypothesis from Allelopathic Inhibitory Effects of Lichens on the Caestia Pyramid (Rome)

Chemosyndrome Variation in Mycobiont Culture and Thallus of <em>Parmelina carporrhizans</em> and <em>Parmelina quercina</em>

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