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André Aptroot - One of the best experts on this subject based on the ideXlab platform.
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Five new records of Pyrenula (Pyrenulaceae) for New Zealand
New Zealand Journal of Botany, 2019Co-Authors: Andrew Marshall, André Aptroot, Dan Blanchon, Peter J. De LangeAbstract:ABSTRACTPyrenula (Pyrenulaceae) is a poorly studied genus of lichenized mycobiota in New Zealand. Following the sampling of lichens from over 50 vegetation plots established within the Auckland Reg...
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Eight new species of Pyrenulaceae from the Neotropics, with a key to 3-septate Pyrgillus species
The Lichenologist, 2018Co-Authors: André Aptroot, Harrie J. M. Sipman, Cléverton De Oliveira Mendonça, Joel Alejandro Mercado Diaz, Shirley Cunha Feuerstein, Iane Paula Rego Cunha-dias, Thamires Pereira, Marcela Eugenia Da Silva CáceresAbstract:Eight new species of Pyrenulaceae are described as new to science from Brazil, Guyana and Puerto Rico. Pyrenula sanguineomeandrata Aptroot & Mercado Diaz (with a thallus with red, KOH+ purple pigmentation of lines or a reticulum, simple ascomata with vertical ostioles, a deep red inspersed, KOH+ orange hamathecium, and dark brown 3-septate ascospores 25–29×10–12 μm) and P. sanguineostiolata Aptroot & Mercado Diaz (with a thallus with deeply immersed simple ascomata with vertical ostioles, which are superficial and bright red, and 3-septate ascospores 25–28×9–12 μm) are described from submontane evergreen forests in Puerto Rico. Pyrenula biseptata Aptroot & M. Caceres (with simple ascomata with vertical ostioles, an inspersed hamathecium and 2-septate ascospores 11–12×4·5–5·0 μm) and P. xanthinspersa Aptroot & M. Caceres (with an ecorticate thallus containing lichexanthone, simple ascomata with vertical ostioles, not inspersed hamathecium and 3-septate ascospores 14–17×6·0–7·5 μm) are described from rainforest in Amazonian Brazil. Pyrenula subvariabilis Aptroot & Sipman (with fused ascomata with lateral ostioles and submuriform ascospores 17–20(–25)×6–9 μm) and SulcoPyrenula biseriata Aptroot & Sipman (with a thallus containing lichexanthone, simple ascomata with lateral ostioles and lozenge-shaped ascospores with 8 locules, (13–)15–17(–20)×8–10 (width)×6–7 (thickness) μm) are described from savannahs in Guyana. Special attention is paid to the genus Pyrgillus : two new species from the 3-septate core group of this small genus are described from Brazil, viz. P. aurantiacus Aptroot & M. Caceres (with a corticate thallus containing lichexanthone, mazaedium with orange, KOH+ violet, UV+ red pruina and ascospores of 13–16×6·0–7·5 μm) and P. rufus Aptroot & M. Caceres (with a corticate thallus containing lichexanthone, mazaedium with dark red, KOH+ orange, UV+ red pruina and ascospores of 15·0–17·5×5·0–6·5 μm). An updated key to the 3-septate species of Pyrgillus is provided.
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Pyrenula clavatispora, a new species from Florida with narrowly clavate ascospores, with a key to similar species
The Bryologist, 2017Co-Authors: André Aptroot, Ralph S. CommonAbstract:Abstract The new species Pyrenula clavatispora is described from Florida. It has 7–12-septate, narrowly clavate ascospores and clavate asci. The only somewhat similar species are distributed over various islands in the Pacific Ocean. A key is provided for all species of Pyrenula with ascospores over 4 times as long as wide.
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Six new species of the lichen genus Pyrenula ( Pyrenulaceae ) from Northeast Brazil
Phytotaxa, 2016Co-Authors: Cléverton De Oliveira Mendonça, André Aptroot, Marcela Eugenia Da Silva CáceresAbstract:Six new Pyrenula species are described as new to science, viz. Pyrenula aurantiothallina C. O. Mendonca, Aptroot & M. Caceres , with orange thallus with KOH+ purple anthraquinone, simple low conical ascomata, inspersed hamathecium, and ascospores 3-septate, 19.5–22.5 × 7–8.5 µm, generally somewhat constricted at the septa; Pyrenula coccinea C. O. Mendonca, Aptroot & M. Caceres , with yellowish brown thallus and ascomata with 6 to 25 together immersed in a pseudostromata with partly fused outer walls but separate, apical ostioles, covered with red pruina, ascospores 3-septate, 15–18(–20) × 5–6 µm; Pyrenula diamantinensis C. O. Mendonca, Aptroot & M. Caceres , with thallus yellowish brown, corticate, partly with a layer of whitish pruina, with (often eroded) pseudocyphellae, ascomata flattened to subglobose, numerous, partly covered by a layer of whitish pruina, 0.3–0.5 mm diam., mostly with 2–10 sideways touching but not totally fused, clypeus in upper half much thicker than below, ascospores 3-septate, 26–33 × 11–16 µm, lumina mostly obliquely quadrangular; Pyrenula lilacina C. O. Mendonca, Aptroot & M. Caceres, with lilac thallus, simple ascomata, and ascospores 3-septate, 31–37 × 11–14 µm; Pyrenula supralaetior C.O. Mendonca, Aptroot & M. Caceres , which is similar to P. laetior Mull. Arg., but with ascospores 25–31 × 11–13 µm; and Pyrenula violaceastroidea C. O. Mendonca, Aptroot & M. Caceres, with ascomata pyriform, aggregated by 3–6 perithecia with a shared ostiole but without joint walls (parmentarioid), ostiole, ascomata and thallus partly covered by wine-red to purplish, KOH+ purple, anthraquinone. They were all found by the first author during several recent field trips in the North and Northeast of Brazil.
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Preliminary checklist of the lichens of Madagascar, with two new thelotremoid Graphidaceae and 131 new records
Willdenowia, 2016Co-Authors: André AptrootAbstract:Abstract: A checklist of 500 lichens known from Madagascar is published for the first time, including 131 new records. The following 22 species, mostly crustose lichens from rain forests, are here reported for the first time from the continent of Africa: Agonimia opuntiella (Buschardt & Poelt) Vězda, Amandinea efflorescens (Mull. Arg.) Marbach, Anisomeridium ambiguum (Zahlbr.) R. C. Harris, Bacidina simplex var. cyanophila Lucking, Bogoriella miculiformis (Nyl. ex Mull. Arg.) Aptroot & Lucking, B. minutula (Mull. Arg.) Aptroot & Lucking, Catillaria ophthalmocarpa Vain., Coccotrema porinopsis (Nyl.) Imshaug ex Yoshim., Constrictolumina leucostoma (Mull. Arg.) Lucking & al., Dibaeis arcuata (Stirt.) Kalb & Gierl, Graphis argentia Makhija & Adaw., G. consimilis Vain., Lecanora flavidorufa Hue, L. pangerangoensis Zahlbr., L. subflava Tuck., Megalotremis pustulata Aptroot, Mycoporum californicum (Zahlbr.) R. C. Harris, Myeloconis erumpens P. M. McCarthy & Elix, Polychidium dendriscum (Nyl.) Henssen, Pyrenula h...
Takao Tanahashi - One of the best experts on this subject based on the ideXlab platform.
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biosynthetic origin of alkylated decaline type polyketides and induction of a new metabolite by addition of benzoate in cultured mycobionts of Pyrenula sp
Phytochemistry Letters, 2018Co-Authors: Yukiko Takenaka, Takao TanahashiAbstract:Abstract The assembly pattern of acetate units and methyl groups in the biosynthesis of a polyketide, pyrenulic acid C (1), in cultured mycobionts of a Vietnamese Pyrenula sp. was verified by administration of sodium [1-13C]-acetate, sodium [1,2-13C2]-acetate, and L-[methyl-13C]-methionine. The cultured mycobionts were induced to produce a new polyketide, pyrenulic acid I (2), by addition of sodium benzoate to malt-yeast extract medium supplemented with 5% sucrose. Its structure was determined by spectroscopic methods.
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Polyketides from the cultured lichen mycobiont of a Vietnamese Pyrenula sp.
Journal of natural products, 2014Co-Authors: Yukiko Takenaka, Nobuo Hamada, Yoshiyuki Mizushina, Takao TanahashiAbstract:A spore-derived mycobiont of a crustose Pyrenula sp. lichen collected in Vietnam was cultivated on a malt-yeast extract medium supplemented with 10% sucrose. Chemical investigation of the cultivated colonies led to the isolation of eight new alkylated decalin-type polyketides (1–8) along with three known compounds. The structures of these compounds were elucidated by spectroscopic and chemical means. This is the first instance of this type of polyketide being isolated from a cultured lichen mycobiont. The isolated polyketides 1 and 7 exhibited inhibitory activities against mammalian DNA polymerases α and β with IC50 values ranging from 8.1 to 19.5 μM. Compound 1 showed cytotoxic effects against the HCT116 human colon carcinoma cultured cell line with an IC50 value of 6.4 ± 0.7 μM.
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Polyketides from the Cultured Lichen Mycobiont of a Vietnamese Pyrenula sp.
2014Co-Authors: Yukiko Takenaka, Nobuo Hamada, Yoshiyuki Mizushina, Takao TanahashiAbstract:A spore-derived mycobiont of a crustose Pyrenula sp. lichen collected in Vietnam was cultivated on a malt-yeast extract medium supplemented with 10% sucrose. Chemical investigation of the cultivated colonies led to the isolation of eight new alkylated decalin-type polyketides (1–8) along with three known compounds. The structures of these compounds were elucidated by spectroscopic and chemical means. This is the first instance of this type of polyketide being isolated from a cultured lichen mycobiont. The isolated polyketides 1 and 7 exhibited inhibitory activities against mammalian DNA polymerases α and β with IC50 values ranging from 8.1 to 19.5 μM. Compound 1 showed cytotoxic effects against the HCT116 human colon carcinoma cultured cell line with an IC50 value of 6.4 ± 0.7 μM
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Naphthopyrones from Cultured Lichen Mycobionts of Pyrenula sp.
ChemInform, 2010Co-Authors: Yukiko Takenaka, Naotaka Nagakura, Nobuo Hamada, Takao TanahashiAbstract:The new naphthopyrone derivative pyrenulin (I) and the known naphtho-α-pyrone derivative toralactone are isolated from the cultured mycobionts of the lichen Pyrenula sp.
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naphthopyrones from cultured lichen mycobionts of Pyrenula sp
Heterocycles, 2010Co-Authors: Takao Tanahashi, Yukiko Takenaka, Naotaka Nagakura, Nobuo HamadaAbstract:Spore-derived mycobionts of the lichen Pyrenula sp. were cultivated on a malt-yeast extract medium supplemented with 10% sucrose and their metabolites were investigated. A new naphthopyrone derivative, pyrenulin, as well as toralactone were isolated. Their structures were determined by spectroscopic methods. This is the first instance of the isolation of naphthalene derivatives from lichen mycobionts.
Nobuo Hamada - One of the best experts on this subject based on the ideXlab platform.
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Polyketides from the cultured lichen mycobiont of a Vietnamese Pyrenula sp.
Journal of natural products, 2014Co-Authors: Yukiko Takenaka, Nobuo Hamada, Yoshiyuki Mizushina, Takao TanahashiAbstract:A spore-derived mycobiont of a crustose Pyrenula sp. lichen collected in Vietnam was cultivated on a malt-yeast extract medium supplemented with 10% sucrose. Chemical investigation of the cultivated colonies led to the isolation of eight new alkylated decalin-type polyketides (1–8) along with three known compounds. The structures of these compounds were elucidated by spectroscopic and chemical means. This is the first instance of this type of polyketide being isolated from a cultured lichen mycobiont. The isolated polyketides 1 and 7 exhibited inhibitory activities against mammalian DNA polymerases α and β with IC50 values ranging from 8.1 to 19.5 μM. Compound 1 showed cytotoxic effects against the HCT116 human colon carcinoma cultured cell line with an IC50 value of 6.4 ± 0.7 μM.
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Polyketides from the Cultured Lichen Mycobiont of a Vietnamese Pyrenula sp.
2014Co-Authors: Yukiko Takenaka, Nobuo Hamada, Yoshiyuki Mizushina, Takao TanahashiAbstract:A spore-derived mycobiont of a crustose Pyrenula sp. lichen collected in Vietnam was cultivated on a malt-yeast extract medium supplemented with 10% sucrose. Chemical investigation of the cultivated colonies led to the isolation of eight new alkylated decalin-type polyketides (1–8) along with three known compounds. The structures of these compounds were elucidated by spectroscopic and chemical means. This is the first instance of this type of polyketide being isolated from a cultured lichen mycobiont. The isolated polyketides 1 and 7 exhibited inhibitory activities against mammalian DNA polymerases α and β with IC50 values ranging from 8.1 to 19.5 μM. Compound 1 showed cytotoxic effects against the HCT116 human colon carcinoma cultured cell line with an IC50 value of 6.4 ± 0.7 μM
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Naphthopyrones from Cultured Lichen Mycobionts of Pyrenula sp.
ChemInform, 2010Co-Authors: Yukiko Takenaka, Naotaka Nagakura, Nobuo Hamada, Takao TanahashiAbstract:The new naphthopyrone derivative pyrenulin (I) and the known naphtho-α-pyrone derivative toralactone are isolated from the cultured mycobionts of the lichen Pyrenula sp.
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naphthopyrones from cultured lichen mycobionts of Pyrenula sp
Heterocycles, 2010Co-Authors: Takao Tanahashi, Yukiko Takenaka, Naotaka Nagakura, Nobuo HamadaAbstract:Spore-derived mycobionts of the lichen Pyrenula sp. were cultivated on a malt-yeast extract medium supplemented with 10% sucrose and their metabolites were investigated. A new naphthopyrone derivative, pyrenulin, as well as toralactone were isolated. Their structures were determined by spectroscopic methods. This is the first instance of the isolation of naphthalene derivatives from lichen mycobionts.
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Three isocoumarins and a benzofuran from the cultured lichen mycobionts of Pyrenula sp.
Phytochemistry, 2004Co-Authors: Yukiko Takenaka, Takao Tanahashi, Naotaka Nagakura, Atsuko Itoh, Nobuo HamadaAbstract:Abstract The spore-derived mycobionts of the lichen Pyrenula sp. were cultivated on a malt–yeast extract medium supplemented with 10% sucrose. The investigation of their metabolites resulted in isolation of four compounds, three isocoumarins and a biogenetically related benzofuran; their structures were determined by spectroscopic methods.
Yukiko Takenaka - One of the best experts on this subject based on the ideXlab platform.
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biosynthetic origin of alkylated decaline type polyketides and induction of a new metabolite by addition of benzoate in cultured mycobionts of Pyrenula sp
Phytochemistry Letters, 2018Co-Authors: Yukiko Takenaka, Takao TanahashiAbstract:Abstract The assembly pattern of acetate units and methyl groups in the biosynthesis of a polyketide, pyrenulic acid C (1), in cultured mycobionts of a Vietnamese Pyrenula sp. was verified by administration of sodium [1-13C]-acetate, sodium [1,2-13C2]-acetate, and L-[methyl-13C]-methionine. The cultured mycobionts were induced to produce a new polyketide, pyrenulic acid I (2), by addition of sodium benzoate to malt-yeast extract medium supplemented with 5% sucrose. Its structure was determined by spectroscopic methods.
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Polyketides from the cultured lichen mycobiont of a Vietnamese Pyrenula sp.
Journal of natural products, 2014Co-Authors: Yukiko Takenaka, Nobuo Hamada, Yoshiyuki Mizushina, Takao TanahashiAbstract:A spore-derived mycobiont of a crustose Pyrenula sp. lichen collected in Vietnam was cultivated on a malt-yeast extract medium supplemented with 10% sucrose. Chemical investigation of the cultivated colonies led to the isolation of eight new alkylated decalin-type polyketides (1–8) along with three known compounds. The structures of these compounds were elucidated by spectroscopic and chemical means. This is the first instance of this type of polyketide being isolated from a cultured lichen mycobiont. The isolated polyketides 1 and 7 exhibited inhibitory activities against mammalian DNA polymerases α and β with IC50 values ranging from 8.1 to 19.5 μM. Compound 1 showed cytotoxic effects against the HCT116 human colon carcinoma cultured cell line with an IC50 value of 6.4 ± 0.7 μM.
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Polyketides from the Cultured Lichen Mycobiont of a Vietnamese Pyrenula sp.
2014Co-Authors: Yukiko Takenaka, Nobuo Hamada, Yoshiyuki Mizushina, Takao TanahashiAbstract:A spore-derived mycobiont of a crustose Pyrenula sp. lichen collected in Vietnam was cultivated on a malt-yeast extract medium supplemented with 10% sucrose. Chemical investigation of the cultivated colonies led to the isolation of eight new alkylated decalin-type polyketides (1–8) along with three known compounds. The structures of these compounds were elucidated by spectroscopic and chemical means. This is the first instance of this type of polyketide being isolated from a cultured lichen mycobiont. The isolated polyketides 1 and 7 exhibited inhibitory activities against mammalian DNA polymerases α and β with IC50 values ranging from 8.1 to 19.5 μM. Compound 1 showed cytotoxic effects against the HCT116 human colon carcinoma cultured cell line with an IC50 value of 6.4 ± 0.7 μM
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Naphthopyrones from Cultured Lichen Mycobionts of Pyrenula sp.
ChemInform, 2010Co-Authors: Yukiko Takenaka, Naotaka Nagakura, Nobuo Hamada, Takao TanahashiAbstract:The new naphthopyrone derivative pyrenulin (I) and the known naphtho-α-pyrone derivative toralactone are isolated from the cultured mycobionts of the lichen Pyrenula sp.
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naphthopyrones from cultured lichen mycobionts of Pyrenula sp
Heterocycles, 2010Co-Authors: Takao Tanahashi, Yukiko Takenaka, Naotaka Nagakura, Nobuo HamadaAbstract:Spore-derived mycobionts of the lichen Pyrenula sp. were cultivated on a malt-yeast extract medium supplemented with 10% sucrose and their metabolites were investigated. A new naphthopyrone derivative, pyrenulin, as well as toralactone were isolated. Their structures were determined by spectroscopic methods. This is the first instance of the isolation of naphthalene derivatives from lichen mycobionts.
Dalip K. Upreti - One of the best experts on this subject based on the ideXlab platform.
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Floristic Diversity Status Assessment of Lichens from Dima Hasao District, North East, India
2019Co-Authors: Gaurav K. Mishra, Sanjeeva Nayaka, Dalip K. UpretiAbstract:An enumeration of 142 species of lichens belonging to 60 genera and 27 families from Dima Hasao district in North East region is provided. The present study supplemented 98 species new to the lichen biota of Assam. The study added one new record of basidiolichen [Multiclavula vernalis (Schw.) Petersen] to the lichen biota of India. The lichen genus Graphis with 21 species exhibit its dominance in the area followed by Pyrenula and Parmotrema with nine and eight species respectively. Among the different localities in the area Umrangso towards Khundog showed maximum diversity of lichens represented by 58 species followed by the locality in and around circuit house, represented by 42 species. The dominance of Graphidioid community in the area indicates an evergreen open canopy forest as well as the presence of smooth bark trees in the region.
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Exploration of homegardens as important lichen conservation areas in dargakona village of southern assam, Northeast India
Journal of Functional And Environmental Botany, 2012Co-Authors: Pulak Das, Jayashree Rout, Santosh Joshi, Dalip K. UpretiAbstract:Homegardens create a forest like multistory structure with different vertical and horizontal layers and its characteristic species diversity. The present paper throws light on the importance of homegardens as a significant lichen refuge. The study explored a lichen diversity of 44 species with a representation of 17 genera and 9 families. Graphidaceae is the dominant family followed by Pyrenulaceae and Arthoniaceae. Graphis and Pyrenula are found to be the dominant genera representing about 40% of total species richness. It is observed that the homegardens are shelters to about 15% of lichens which have restricted distribution (endemic) in eastern Himalayan region. The traditional wisdom along with ecological knowledge of the local people in maintaining homegardens in northeastern region seems to be helping in conserving the genetic heritage of wild lichen species of eastern Himalayan region. This becomes more important in the wake of wanton destruction of forests and hence lichens growing there.
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Diversity and Distribution of Lichens in Katarniaghat Wildlife Sanctuary, Uttar Pradesh
The Journal of Indian Botanical Society, 2011Co-Authors: Sanjeeva Nayaka, Dalip K. Upreti, Roshni KhareAbstract:The lichens of Katarniaghat Wildlife Sanctuary, Uttar Pradesh are studied for the first time. The survey in 11 localities resulted in 42 species with dominance of crustose and epiphytic lichens. The sanctuary has luxuriant growth of graphidaceous and pyrenocarpous lichens. The most dominant genera are Pyrenula and Graphis with 5 species each and the most common lichen species in the sanctuary are Dirinaria consimilis, Graphis subasahinae, Letrouitia transgressa and Pyrenula subacutalis. The present study added a total of 33 species to the lichen flora of Uttar Pradesh. Parmotrema mesotropum, P. praesorediosums and P. saccatilobum are the only parmelioid lichens known from the sanctuary can be considered as indicators of healthy, moist and shady environment of the sanctuary. Lichen diversity in different forest sites is discussed and lichen rich sites are identified for conservation. Although Katarniaghat is heavily influenced by anthropogenic activities, it appears that lichen flora of the sanctuary is less affected.
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A Comparative Study of Total Chlorophyll Content and Chlorophyll Degradation of Some Lichens in Disturbed and Undisturbed Sites of Along town, West Siang District, Arunachal Pradesh
Assam University Journal of Science and Technology, 2010Co-Authors: Urvashi Dubey, Dalip K. UpretiAbstract:Lichen samples of Pyrenula introducta, Leptogium denticulatum and Acanthothecis sps. were collected from both disturbed and undisturbed sites of Along, West Siang District, Arunachal Pradesh and total chlorophyll content, carotenoid and chlorophyll degradation are estimated. Total chlorophyll and carotenoid are maximum in Acanthothecis sps. followed by Pyrenula introducta and Leptogium denticulatum. Chlorophyll degradation ratio is found maximum in Leptogium denticulatum followed by Acanthothecis sps. and Pyrenula introducta. Chlorophyll degradation and total chlorophyll content are higher in disturbed site as compared to the undisturbed site.
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Lichen genus Pyrenula from India VII. Pyrenula mastophora spore type
Feddes Repertorium, 2008Co-Authors: Dalip K. UpretiAbstract:Twenty four species of the lichen genus Pyrenula having Pyrenula mastophora type of spores are described. Pyrenula bilirana VAINIO, P. cinereovelata VAINIO, P. comirana VAINIO, P. costaricensis MUELL.-ARG., P. fuscolurida VAINIO, P. limae VAINIO, P. melaleuca MUELL.-ARG., P. microcarpoides MUELL.-ARG., P. obscurior VAINIO and P. santensis (NYL.) MUELL.-ARG. are new records for Indian lichen flora. Von der Flechtengattung Pyrenula werden 24 Arten, deren Sporen dem Pyrenula mastophora Typ entsprechen, beschrieben. Dabei werden folgend Arten erstmals aus Indien gemeldet: Pyrenula bilirana VAINIO, P. cinereovelata VAINIO, P. comirana VAINIO, P. costaricensis MUELL.-ARG., P. fuscolurida VAINIO, P. limae VAINIO, P. melaleuca MUELL.-ARG., P. microcarpoides MUELL.-ARG., P. obscurior VAINIO und P. santensis (NYL.) MUELL.-ARG.
