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Diploschistes hensseniae
Lumbsch & Elix is described as new to science. It is characterized by its terricolous habitat, perithecioid closed ascomata, relatively small spores, cylindrical asci, and the presence of diploschistesic and orsellinic acids in addition to lecanoric acid. It occurs on soil in arid regions of Australia. 相似文献
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Three species which contain both gyrophoric and lecanoric acids and possess perithecioid ascomata are recognized in the genusDiploschistes. D. badius andD. gyrophoricus are described as new, whileD. subcupreus is reduced to synonymy withD. sticticus. Two species occur in the southern hemisphere, whileD. badius is found in N. America. 相似文献
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H. Thorsten Lumbsch Thomas Lunke G. Benno Feige Siegfried Huneck 《Plant Systematics and Evolution》1995,198(3-4):275-286
The anatomy, chemistry and developmental morphology ofAnamylopsora pulcherrima is investigated. Some characters, including the ascus structure, suggest a close affinity with theAgyriaceae. However, the chemistry and the pycnidial structure differ as well as the ascoma ontogeny.Anamylopsora has a gymnocarpous ascoma development and the ascogonia are produced in stipes.Trapelia coarctata, as a typical member of theAgyriaceae, shows a hemiangiocarpous ascoma ontogeny. The anatomical, chemical and ontogenetical characters of several families are compared withAnamylopsora and it is shown that the genus is best placed in a monotypic familyAnamylopsoraceae
Lumbsch & Lunke, fam. nova, which is placed in theAgyriineae (Lecanorales).This paper is dedicated to Prof. DrAino Henssen (Marburg) on the occasion of the 70th birthday. 相似文献
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Matthew P. Nelsen Robert Lücking C. Kevin Boyce H. Thorsten Lumbsch Richard H. Ree 《Geobiology》2020,18(1):3-13
The early‐successional status of lichens in modern terrestrial ecosystems, together with the role lichen‐mediated weathering plays in the carbon cycle, have contributed to the long and widely held assumption that lichens occupied early terrestrial ecosystems prior to the evolution of vascular plants and drove global change during this time. Their poor preservation potential and the classification of ambiguous fossils as lichens or other fungal–algal associations have further reinforced this view. As unambiguous fossil data are lacking to demonstrate the presence of lichens prior to vascular plants, we utilize an alternate approach to assess their historic presence in early terrestrial ecosystems. Here, we analyze new time‐calibrated phylogenies of ascomycete fungi and chlorophytan algae, that intensively sample lineages with lichen symbionts. Age estimates for several interacting clades show broad congruence and demonstrate that fungal origins of lichenization postdate the earliest tracheophytes. Coupled with the absence of unambiguous fossil data, our work finds no support for lichens having mediated global change during the Neoproterozoic‐early Paleozoic prior to vascular plants. We conclude by discussing our findings in the context of Neoproterozoic‐Paleozoic terrestrial ecosystem evolution and the paleoecological context in which vascular plants evolved. 相似文献
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J?Craig CohenEmail author Lennart?KA?Lundblad Jason?HT?Bates Michael?Levitzky Janet?E?Larson 《BMC genetics》2004,5(1):21
Background
Cystic Fibrosis is a pleiotropic disease in humans with primary morbidity and mortality associated with a lung disease phenotype. However, knockout in the mouse of cftr, the gene whose mutant alleles are responsible for cystic fibrosis, has previously failed to produce a readily, quantifiable lung phenotype. 相似文献8.
The phylogenetic relationships of the lichen genus Placopsis and related genera in the Agyriales were analyzed using molecular data. We obtained a total of 66 new sequences from the nuclear ITS, LSU and the mitochondrial SSU rDNA. Phylogenetic analyses were conducted in a Bayesian and a maximum-parsimony framework. Our analyses show that Placopsis is paraphyletic with members of Orceolina nesting within the genus. A morphological character supporting the Placopsis-Orceolina clade is the non-amyloid ascus. The section Aspiciliopsis as defined by sunken fruiting bodies is not supported, but the type species of Aspiciliopsis is more closely related to Orceolina. This clade shares apothecia with reduced amphithecia as apomorphic character. We suggest resurrecting the generic name Aspiciliopsis. Trapelia is the sister genus to Placopsis and Aspiciliopsis/Orceolina. 相似文献
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H. T. Lumbsch 《Plant biology (Stuttgart, Germany)》1999,1(3):321-326
Abstract: The structure and development of the ascomata in Mycoporum elabens were studied. No pseudoparaphyses or para-physoids are developed but the asci grow into a network formed by stretched ascostromatic tissue which appears similar to pseudoparaphyses at the mature stage. The ascomata do not open regularly but burst open at several points, thus imitating plurilo-cularous stromata. This development agrees with that observed for the Dothideales sensu stricto and so it is proposed to place the Mycoporaceae here. Although algal cells were found in the surroundings of the ascomata, they did not have close contact with the fungal hyphae. Thus, Mycoporum elabens is interpreted as being non-lichenized. 相似文献
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Iris M Costa Tallybia HT Nasser Marilene Demasi Rafaella MP Nascimento Luis ES Netto Sayuri Miyamoto Fernanda M Prado Gisele Monteiro 《BMC microbiology》2011,11(1):268