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John A Elix - One of the best experts on this subject based on the ideXlab platform.
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Buellia
2012Co-Authors: John A ElixAbstract:Thallus crustose, superficial, thin, smooth to rugulose, continuous, membranous to rimose and areolate or scaly, 1–5 cm wide, 35–70 μm thick, corticate or not, rarely immersed and inconspicuous. Prothallus absent or present as a thin dark brown or black marginal line. Isidia and soredia absent. Upper surface white, grey-white to grey, yellow-grey, brown or greenish. Photobiont a unicellular green alga; cells 8–14 μm diam., not forming a continuous layer. Medulla and lower cortex present or absent. Ascomata apothecial, orbicular, sessile or rarely subimmersed; disc dark brown to black, rarely pruinose, plane to convex or weakly concave; margin concolorous with the disc, usually persistent, becoming excluded in convex apothecia; thalline exciple absent; proper exciple carbonised, dark red-brown to ±black, consisting of radiating agglutinated hyphae, uniformly pigmented or with a paler inner zone. Epihymenium 10–30 μm thick, brown or greenish, K+ violet, yellow-green, olive or K–; hypothecium 50–170 μm thick, brown to dark brown, occasionally not differentiated from the exciple; hymenium 60–150 μm thick, colourless, often inspersed with oil droplets, amyloid. Paraphyses septate, 1–2 μm thick, simple or with short branches near the apices; apices clavate, 3–5 μm thick, usually brown-capitate, K+ purple or K–. Asci of Lecanoratype
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Buellia rhizocarpica a new corticolous species from mexico
Lichenologist, 2010Co-Authors: Javier Etayo, Mireia Giralt, John A ElixAbstract:Buellia rhizocarpica is described from Mexico. This corticolous species is characterized by a yellowish, granulose thallus, the presence of rhizocarpic acid and an unknown pulvinic acid derivative, apothecia containing large amounts of micromera-green together with yellow crystals which react K+ pinkish and by the presence of very small, Buellia-type ascospores. It grows in a well-preserved Pinus hartwegii forest at c. 4000 m altitude at the base of the volcano Popocatepetl.
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Buellia nordinii a new triseptate species from venezuela
Lichenologist, 2010Co-Authors: Mireia Giralt, Klaus Kalb, John A ElixAbstract:Abstract: Buellia nordinii , a new muscicolous or lignicolous species characterized by a blastidiatethalluscontainingatranorin,apotheciawithafinegranularsurface,markedlyenlargedparaphysestipsand large triseptate ascospores is described from Venezuela. The species grows in very humidsituations near the ground in open paramo vegetation at high elevations. It is compared with otherknown asexually reproducing and triseptate Buellia taxa. Key words: Lecanoromycetes, lichenized fungi, Physciaceae , South America, taxonomy Introduction A very characteristic specimen of Buellia wasfound growing with Rinodina fuscoisidiata Giralt et al . (2010: 3, sub Buellia aff. proxi-mata ), an isidiate, muscicolous taxon re-cently described from high altitudes in theParamo vegetation of Venezuela (Giralt et al .2010).Thepresenceofadditionalspecimensintheherbariumofthesecondauthor(hb.K.Kalb) allowed detailed morphological andchemical studies which have shown that theycan be clearly distinguished from all otherknown triseptate
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Buellia lindingeri and rinodina hallii physciaceae two closely related species
The Bryologist, 2010Co-Authors: Mireia Giralt, Pieter P G Van Den Boom, John A ElixAbstract:A comparative study of the morphology, anatomy and chemistry of Buellia lindingeri and Rinodina hallii clearly shows that these taxa are very closely related but not conspecific. The unique epihymenia distinguishes them from most species of both Buellia and Rinodina but, as they are more closely related to Rinodina, Buellia lindingeri is transferred to that genus.
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A new chemotype of Buellia triseptata (Physciaceae)
The Bryologist, 2010Co-Authors: Mireia Giralt, Anders Nordin, John A ElixAbstract:Two collections of a chemically distinctive corticolous Buellia species were discovered in the herbarium of Sampaio at the University of Porto (po). A detailed morphological and chemical study of the specimens, as well as of additional material for comparison purposes, showed that they agree with Buellia triseptata, only differing by containing xanthones. They are here provisionally regarded as representing a new chemotype of B. triseptata. Further, the generic assignment of B. triseptata is discussed.
Mireia Giralt - One of the best experts on this subject based on the ideXlab platform.
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orcularia a segregate from the lichen genera Buellia and rinodina lecanoromycetes caliciaceae
Phytotaxa, 2011Co-Authors: Klaus Kalb, Mireia GiraltAbstract:The new lichen genus Orcularia , based on Rinodina sect. Orcularia , is described. It is characterized by Orcularia- type ascospores and filiform conidia. So far the newly described O. elixii as well as O. insperata (type species), O. placodiomorpha and O. placodiomorphoides are found to belong to this genus. Descriptions, illustrations and a key for them are provided.
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the genus Buellia s l and some additional genera of physciaceae in the canary islands
Nova Hedwigia, 2011Co-Authors: Mireia Giralt, Pieter P G Van Den BoomAbstract:The Buellia s. lat. species that occur in the Canary Islands are described including the related genera Amandinea, Diplotomma and Tetramelas. Species of the genera Coscinocladium, Dimelaena and Diploicia are also included. Forty-one species have been identified. Nine species are new records for the archipelago. The study of the type specimens and additional material of Buellia caloplacivora, B. sequax and B. leptina demonstrated that the two former are not conspecific and that the third is a valid taxon. The new combinations Buellia gomerana and Buellia alisioae are proposed. A short description, including the chemistry, ecology and distribution of all taxa is provided. A key to the species known to occur in the study area is also included.
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Buellia rhizocarpica a new corticolous species from mexico
Lichenologist, 2010Co-Authors: Javier Etayo, Mireia Giralt, John A ElixAbstract:Buellia rhizocarpica is described from Mexico. This corticolous species is characterized by a yellowish, granulose thallus, the presence of rhizocarpic acid and an unknown pulvinic acid derivative, apothecia containing large amounts of micromera-green together with yellow crystals which react K+ pinkish and by the presence of very small, Buellia-type ascospores. It grows in a well-preserved Pinus hartwegii forest at c. 4000 m altitude at the base of the volcano Popocatepetl.
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Buellia nordinii a new triseptate species from venezuela
Lichenologist, 2010Co-Authors: Mireia Giralt, Klaus Kalb, John A ElixAbstract:Abstract: Buellia nordinii , a new muscicolous or lignicolous species characterized by a blastidiatethalluscontainingatranorin,apotheciawithafinegranularsurface,markedlyenlargedparaphysestipsand large triseptate ascospores is described from Venezuela. The species grows in very humidsituations near the ground in open paramo vegetation at high elevations. It is compared with otherknown asexually reproducing and triseptate Buellia taxa. Key words: Lecanoromycetes, lichenized fungi, Physciaceae , South America, taxonomy Introduction A very characteristic specimen of Buellia wasfound growing with Rinodina fuscoisidiata Giralt et al . (2010: 3, sub Buellia aff. proxi-mata ), an isidiate, muscicolous taxon re-cently described from high altitudes in theParamo vegetation of Venezuela (Giralt et al .2010).Thepresenceofadditionalspecimensintheherbariumofthesecondauthor(hb.K.Kalb) allowed detailed morphological andchemical studies which have shown that theycan be clearly distinguished from all otherknown triseptate
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Buellia lindingeri and rinodina hallii physciaceae two closely related species
The Bryologist, 2010Co-Authors: Mireia Giralt, Pieter P G Van Den Boom, John A ElixAbstract:A comparative study of the morphology, anatomy and chemistry of Buellia lindingeri and Rinodina hallii clearly shows that these taxa are very closely related but not conspecific. The unique epihymenia distinguishes them from most species of both Buellia and Rinodina but, as they are more closely related to Rinodina, Buellia lindingeri is transferred to that genus.
Erin A Tripp - One of the best experts on this subject based on the ideXlab platform.
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disentangling geographical biotic and abiotic drivers of plant diversity in neotropical ruellia acanthaceae
PLOS ONE, 2017Co-Authors: Erin A Tripp, Yihsin Erica TsaiAbstract:It has long been hypothesized that biotic interactions are important drivers of biodiversity evolution, yet such interactions have been relatively less studied than abiotic factors owing to the inherent complexity in and the number of types of such interactions. Amongst the most prominent of biotic interactions worldwide are those between plants and pollinators. In the Neotropics, the most biodiverse region on Earth, hummingbird and bee pollination have contributed substantially to plant fitness. Using comparative methods, we test the macroevolutionary consequences of bird and bee pollination within a species rich lineage of flowering plants: Ruellia. We additionally explore impacts of species occupancy of ever-wet rainforests vs. dry ecosystems including cerrado and seasonally dry tropical forests. We compared outcomes based on two different methods of model selection: a traditional approach that utilizes a series of transitive likelihood ratio tests as well as a weighted model averaging approach. Analyses yield evidence for increased net diversification rates among Neotropical Ruellia (compared to Paleotropical lineages) as well as among hummingbird-adapted species. In contrast, we recovered no evidence of higher diversification rates among either bee- or non-bee-adapted lineages and no evidence for higher rates among wet or dry habitat lineages. Understanding fully the factors that have contributed to biases in biodiversity across the planet will ultimately depend upon incorporating knowledge of biotic interactions as well as connecting microevolutionary processes to macroevolutionary patterns.
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the draft genome of ruellia speciosa beautiful wild petunia acanthaceae
DNA Research, 2017Co-Authors: Erin A Tripp, Yongbin ZhuangAbstract:The genus Ruellia (Wild Petunias; Acanthaceae) is characterized by an enormous diversity of floral shapes and colours manifested among closely related species. Using Illumina platform, we reconstructed the draft genome of Ruellia speciosa, with a scaffold size of 1,021 Mb (or ∼1.02 Gb) and an N50 size of 17,908 bp, spanning ∼93% of the estimated genome (∼1.1 Gb). The draft assembly predicted 40,124 gene models and phylogenetic analyses of four key enzymes involved in anthocyanin colour production [flavanone 3-hydroxylase (F3H), flavonoid 3'-hydroxylase (F3'H), flavonoid 3',5'-hydroxylase (F3'5'H), and dihydroflavonol 4-reductase (DFR)] found that most angiosperms here sampled harboured at least one copy of F3H, F3'H, and DFR. In contrast, fewer than one-half (but including R. speciosa) harboured a copy of F3'5'H, supporting observations that blue flowers and/or fruits, which this enzyme is required for, are less common among flowering plants. Ka/Ks analyses of duplicated copies of F3'H and DFR in R. speciosa suggested purifying selection in the former but detected evidence of positive selection in the latter. The genome sequence and annotation of R. speciosa represents only one of only four families sequenced in the large and important Asterid clade of flowering plants and, as such, will facilitate extensive future research on this diverse group, particularly with respect to floral evolution.
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ruellia domatiata acanthaceae a striking new species from madagascar
Kew Bulletin, 2017Co-Authors: Iain Darbyshire, Erin A Tripp, Guy Eric OnjalalainaAbstract:The new species Ruellia domatiata I. Darbysh. & E. Tripp from northern Madagascar is described and illustrated and its affinities within the genus are discussed. This striking new species is currently assessed as Critically Endangered using the categories and criteria of the IUCN Red List. The presence of tuft-domatia on the undersurface of the leaves, a rare occurrence in the Acanthaceae family, is noted.
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time calibrated phylogenies of hummingbirds and hummingbird pollinated plants reject a hypothesis of diffuse co evolution
Aliso, 2013Co-Authors: Erin A Tripp, Lucinda A McdadeAbstract:Neotropical ecosystems house levels of species diversity that are unmatched by any other region on Earth. One hypothesis to explain this celebrated diversity invokes a model of biotic interactions in which interspecific interactions drive diversification of two (or more) lineages. When the impact of the interaction on diversification is reciprocal, diversification of the lineages should be contemporaneous. Although past studies have provided evidence needed to test alternative models of diversification such as those involving abiotic factors (e.g., Andean uplift, shifting climatological regimes), tests of the biotic model have been stymied by lack of evolutionary time scale for symbiotic partners. In this study, we infer timescales for diversification of hummingbirds and a species-rich plant lineage that is ,50% hummingbird pollinated, Ruellia (Acanthaceae). Results demonstrate that hummingbirds originated about 20 million years before New World Ruellia and that all but one major hummingbird clade was extant before the plant group originated. Thus, the classic model of ‘‘diffuse co-evolution’’ between hummingbirds and this group of plants is rejected by our data. However, together with the observation that the Neotropical clade of Ruellia (,350 species) is far more species rich than its Old World sister group (,75 species), our results are consistent with the hypothesis that plant diversification in the Neotropics has been facilitated in part by a pre-existing diversity of hummingbirds. This hypothesis may find support in other lineages of Neotropical plants that similarly exhibit asymmetrical partitioning of species diversity in the Paleovs. Neotropics.
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taxonomic revision of ruellia section chiropterophila acanthaceae a lineage of rare and endemic species from mexico
Systematic Botany, 2010Co-Authors: Erin A TrippAbstract:Abstract Ruellia section Chiropterophila as here recognized contains 11 species endemic to areas in and around the transnational Volcanic Belt of Mexico: the Sierra Madre del Sur, the Balsas Depression, and the Altiplano. Most of these species are rare, and nearly half are known only from one or two collections. Of the remaining six, two are restricted to single states. One species described as new to science, Ruellia laslobasensis , is distinguished from a close relative by its smaller corollas, calyces, and fruits. Ruellia chilpancingana is placed into synonymy with R. sororia. Ruellia section Urceolata is synonymized with sect. Chiropterophila. Two species previously treated in sect. Chiropterophila, Ruellia petiolaris (as R. palmeri) and R. carmenaemiliae, are excluded from the section. Phylogenetic analyses using three chloroplast markers (trnC-trnR, trnG-trnS, psbA-trnH) and one nuclear marker (ITS + 5.8S) were conducted to test the monophyly of sect. Chiropterophila and to reconstruct relationships...
S Ott - One of the best experts on this subject based on the ideXlab platform.
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dna damage of the lichen Buellia frigida after 1 5 years in space using randomly amplified polymorphic dna rapd technique
Planetary and Space Science, 2019Co-Authors: Theresa Backhaus, J Meesen, Rene Demets, Jeanpierre De Vera, S OttAbstract:Abstract As part of the ESA space experiment BIOMEX (Biology and Mars Experiment) the lichen Buellia frigida has been exposed to space and simulated Mars analogue conditions on the expose facility EXPOSE-R2 placed outside the Russian Zvezda module on the International Space Station (ISS) for 1.5 years. Randomly Amplified Polymorphic DNA (RAPD) technique has been carried out to study the effect of space conditions on the DNA integrity as well as to assess DNA damage. The RAPD profiles of the space exposed lichen samples demonstrate conspicuous changes compared to the control profiles. For the survival of cells and entire organisms the DNA integrity is an essential prerequisite. The results of the study presented indicate a minor resistance potential of the lichen Buellia frigida towards Low Earth Orbit and Mars analogue conditions effecting the survival potential and the resistance of the symbiotic organism.
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resistance of the lichen Buellia frigida to simulated space conditions during the preflight tests for biomex viability assay and morphological stability
Astrobiology, 2015Co-Authors: J Meesen, P Wuthenow, P Schille, Elke Rabbow, J P De Vera, S OttAbstract:Abstract Samples of the extremotolerant Antarctic endemite lichen Buellia frigida are currently exposed to low-Earth orbit–space and simulated Mars conditions at the Biology and Mars Experiment (BIOMEX), which is part of the ESA mission EXPOSE-R2 on the International Space Station and was launched on 23 July 2014. In preparation for the mission, several preflight tests (Experimental and Scientific Verification Tests, EVT and SVT) assessed the sample preparation and hardware integration procedures as well as the resistance of the candidate organism toward the abiotic stressors experienced under space and Mars conditions. Therefore, we quantified the post-exposure viability with a live/dead staining technique utilizing FUN-1 and confocal laser scanning microscopy (CLSM). In addition, we used scanning electron microscopy (SEM) to investigate putative patterns of morphological-anatomical damage that lichens may suffer under the extreme exposure conditions. The present results demonstrate that Buellia frigida ...
Jae Seoun Hur - One of the best experts on this subject based on the ideXlab platform.
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Two New Corticolous Buellioid Species from South Korea
2019Co-Authors: Dong Liu, Laszlo Lőkos, Sergey Y Kondratyuk, Jung Shin Park, Josef P. Halda, Min-hye Jeong, Jung-jae Woo, Jae Seoun HurAbstract:Several buellioid specimens were collected from South Korea during field surveys and two new species are described based on morphology, chemistry, and molecular phylogeny. Buellia boseongensis sp. nov. is similar to B. polyspora but differs in having a UV + orange thallus and cryptolecanorine apothecia. Sculptolumina coreana sp. nov., resembles S. japonica, but differs in having a smooth entire continuous thallus, which reacts K–, a narrower excipulum, thicker epihymenium, narrower subhymenium, and in containing secondary metabolites other than flavo-obscurin and myeloconone. A key to the buellioid lichens reported from Korea is also presented.
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new species and new records of Buellia lichenized ascomycetes from jeju province south korea
Mycobiology, 2016Co-Authors: Xin Yu Wang, Dong Liu, Laszlo Lőkos, Sergey Y Kondratyuk, Jung Shin Park, Jae Seoun HurAbstract:A new species and 2 new records of lichen genus Buellia were discovered from Chuja-do Island in Jeju Province during a recent floristic survey: B. chujana X. Y. Wang, S. Y. Kondr., L. Lőkos & J.-S. Hur sp. nov., B. halonia (Ach.) Tuck., and B. mamillana (Tuck.) W. A. Weber. The new species is characterized by a brown, areolate thallus, the presence of perlatolic acid, and a saxicolous habitat. Together with previously recorded species, 10 Buellia species were confirmed from Jeju-do Island. Among these species, 3 growing in the exposed rocky area contained xanthone (yellowish lichen thallus, UV + orange), indicating that production of xanthone in this genus might be a defense strategy against the harm of UV light. Although the genus Buellia has been thoroughly studied in Korea before, novel species have been discovered continuously, and large species diversity has been found in this crustose genus, even from a small rocky island. This study indicates that the coastal area harbors a vast number of crustose lichen species, and there is great potential to discover unknown lichens in the coastal rocky area in Korea.
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Further additions to lichen genus Buellia de not. In South Korea.
Mycobiology, 2010Co-Authors: Yogesh Joshi, Young Jin Koh, Jae Seoun HurAbstract:The paper describes two new records of the lichen genus Buellia (B. badia and B. nashii) from South Korea. A detailed taxonomic description and comments are presented for both taxa. An updated key representing all Buellia species known from South Korea is also provided.
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notes on lichen genus Buellia de not lichenized ascomycetes from south korea
Mycobiology, 2010Co-Authors: Yogesh Joshi, Young Jin Koh, Xin Yu Wang, Laszlo Lokos, Jae Seoun HurAbstract:Based on a literature survey and assessment of the important features of lichen genus Buellia (spore shape and size, anatomy of the exciple as well as analysis of the lichen substances), the present paper describes four new records of B. maritima, B. polyspora, B. spuria and B. stellulata from South Korea. Among them, B. maritima and B. polyspora are firstly reported in East Asia including in China, the Korean Peninsula and Japan. Brief description of all the new records along with earlier described species placed under genus Amandinea and Hafellia are provided with their distribution and chemistry. A key to all the Buellia species reported so far from South Korea is also provided.
