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  • Botany & Mycology 2009 - Abstract Search
    is null or not a SELECT 13 16 34 Abstract Detail Tropical and Subtropical Lichens Diversity and Floristics Herrera Campos Maria A 1 Clerc Philippe 2 Shrubby soredio isidiate species of Usnea in Mexico The systematic study of the genus in México is relatively recent and represents a contribution to its understanding around the world particularly for the delimitation of the diagnostic characters that define its species Morphological anatomical and chemical characters as well as the distribution in the country are studied for seven species of the U subfloridana aggregate U diplotypus Vainio U fulvoreagens Räsänen Räsänen U glabrescens Nyl ex Vainio Vainio U pacificana P Halonen U praetervisa Asahina P Clerc U subfloridana Stirton and U wasmuthii Räsänen two pertaining to the U lapponica group U substerilis Mot and U lapponica Vainio Several related species such as U flammea Stirton U halei P Clerc U trachista Mot U hirta L F H Wigg and U trachista Mot are included Among the species studied U wasmuthii exhibits the widest distribution in the country followed by U subfloridana while U pacificana U fulvoreagens and U flammeaare present in very few localities U pacificana U flammea and U glabrescens are first reported

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=905 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    13 16 36 SQL Statement is null or not a SELECT 13 16 36 Abstract Detail Tropical and Subtropical Lichens Diversity and Floristics Rosentreter Roger 1 DeBolt Ann 2 Studies on the federally endangered Florida endemic Cladonia perforata Cladonia perforata A Evans described in 1952 was first collected on Santa Rosa Island in northwest Florida by George Llano This lichen is restricted to the highest xeric white sand ridges in rosemary scrub habitat in Florida In 1993 C perforata was listed as endangered because of the significant loss of scrub habitat in Florida Less than 15 percent of the historic distribution of scrub habitat persists and land conversion to citrus and residential development continues to diminish scrub habitat almost daily This species is known to occur on approximately 30 sites in Florida all but two sites are in the South Florida Ecosystem Cladonia perforata is suspected of reproducing only by vegetative fragmentation it has no spore producing organs Therefore transplant experiments were conducted from areas with extensive 2004 hurricane windfall where C perforata has managed to persist but which are vulnerable to proposed burn treatments Translocated thalli were tethered on nylon fishing line in areas where prescribed burning is not

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=975 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    lichens that has been poorly known at the species level and the phylogenetic placement has been unclear Within the last five years a project has focused on these crustose lichens Phylogenetic studies based on molecular data sets could show that the family is not a monophyletic group but nested within Graphidaceae another family of mostly tropical crustose lichens Taxa previously placed in Thelotremataceae mostly fall into two distinct clades the Thelotrema clade with species having lateral paraphyses and the Ocellularia clade with often carbonized apothecial margins The two families Graphidaceae and Thelotremataceae were mainly distinguished based on their ascoma morphology which was shown to be of minor taxonomic importance Consequently the two families were merged with Graphidaceae being the older name for the family Further evolutionary trends of ascoma types within these lichens and the phylogenetic position of the order Ostropales to which Graphidaceae sensu lato belongs has been studied Several transitions from apothecial to perithecial ascoma types were identified within Ostropomycetidae based on ancestral character reconstructions and maximum likelihood based methods The classification within thelotremoid Graphidaceae was also addressed based on molecular data a revised generic concept was developed for the Thelotrema clade with the description of additional genera

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=714 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    Locations or Search Botany Mycology 2009 Home Login Send Email Message From Name From Email To A Mangold Subject Message Please type in the 5 characters between 0 and 9 and between A and F shown above and submit the

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=contactbyemail&id=14597 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    an extreme habitat for active microbial life During freezing and binding of water in ice crystals ions are expelled in the remaining liquid water veins These veins and liquid water at the base of polythermal glaciers provide still poorly understood and explored habitats for microbial life Preventing the osmotic stress by media with lowered water activity and low incubation temperatures we were the first to isolate surprisingly high number of fungi from melted subglacial ice of four different polythermal glaciers Spitzbergen Norway Isolates were identified based on morphology secondary metabolite profiles and molecular data The majority of fungi were basidiomycetous yeasts with Cryptococcus liquefaciens as the dominant species Representatives of the genus Cladosporium and the ubiquitous pleomorphic halotolerant Aureobasidium pullulans were found particularly in ice containing precipitated gypsum crystals The sediment rich subglacial ice contained a very high occurrence and diversity of filamentous Penicillium spp with P crustosum as the dominant species Multilocus analyses showed that most Arctic fungal isolates form distinct genotypes which were later described as species or subspecies Subglacial environments constitute a unique ecosystem since they enable on the geological scale occasional enrichment of the most robust species able to tolerate a broad range of temperatures and

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=252 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    organo sedimentary ecosystem found in a wide range of habitats Fluctuating diel and seasonal physicochemical gradients characterize these ecosystems resulting in both strata and microenvironments that harbor specific microbial communities We have used traditional and molecular techniques TRFLP TTGE and cloning to document the presence of fungi within tropical and temperate hypersaline microbial mats In this study we evaluate how the fungal community changes through time and space and its possible role in the degradation of complex carbohydrates EPS Microbial mat samples were taken from April 2006 to January 2008 in two natural lagoons in Puerto Rico and in Slovenia from May to September 2008 Traditional and molecular techniques show strong spatial and temporal heterogeneities Higher abundance of isolates and phylotypes are observed during the wet season and diversity decrease from the top oxic to the bottom anoxic layers Cladosporium Aspergillus and Penicillium are among the more common species detected with both traditional and molecular techniques while Acremonium species have been detected only by cloning Enrichments of mat slurries and xanthan a model EPS without antibiotics full community show faster degradation than enrichments with antibiotics fungal community This suggests that the degradation may be the result of the consortium of

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=542 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    00 Abstract Detail Unusual fungal niches Zalar Polona 1 Gunde Cimerman Nina 1 Life at the edge extremotolerant fungi in salterns Environments with extreme physicochemical parameters have been long thought to be inhabited exclusively by a wide variety of Bacteria and Archaea In the last decade we realized that also Eukaryotes have a great capacity to adapt to various extreme conditions Fungi are amongst the successful ones a diversity of fungal species has been uncovered in cold dry salty or acidic habitats While studying fungi from salty environments worldwide we have observed endemic as well as cosmopolitian taxa many of which we described as new species The initial studies have been conducted at the salterns Secovlje situated at the Mediterranean coast while later studies have been extended to salterns and salt lakes located worlwide The prevailing mycobiota is scattered along the tree of fungal Kingdom with the main groups in the ascomycetous orders Capnodiales Eurotiales Saccharomycetales and basidiomycetous orders Wallemiales Sporidiobolales and Tremellales These fungal groups are ecologically very versatile with the only exception of Wallemiales which occurs in osmotically stressed environments only An overview of halophilic and halotolerant fungal groups in hypersaline waters will be presented Many studies exist on the adaptations of prokaryotic microorganisms to life at high salt concentrations while information on eukaryotic microbes was limited to mechanisms employed by the halophilic alga Dunaliella salina Selected dominant species of halophilic fungi represent appropriate eukaryotic models for in depth studies of adaptation to extreme physicochemical conditions Three model species differing in their degree of halotolerance will be presented The ubiquitous halotolerant black yeast Aureobasidum pullulans the extremely halotolerant black yeast Hortaea werneckii and the most halophilic eukaryote known to date the basidiomycetous fungus Wallemia ichthyophaga These model organisms will be compared on the level of cell wall composition

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=320 (2016-02-01)
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  • Botany & Mycology 2009 - Abstract Search
    Date Time Locations or Search Botany Mycology 2009 Home Login Unable to connect to database 13 17 01 Unable to connect to database 13 17 01 SQL Statement is null or not a SELECT 13 17 01 Abstract Detail Unusual fungal niches Dianese Jose C 1 Pereira Carvalho Rita de Cassia 1 Chaves Zuleide M 1 Plant trichomes as a micro habitat for hyphomycetes In the Brazilian tropical savanna many plant species show phyllosphere containing a dense abaxial layer of trichomes Covering those leaf appendages several fungi are commonly found e g parasitic cercosporoid fungi in genera Pseudocercospora Passalora Stenella and Parastenella However most trichome associated fungi are epiphytic hyphomycetes lacking a parasitic interaction with the host A first species was described in 2003 Janetia salvertiae and three new genera Trichomatomyces Trichosporodochium Phaeoidiomyces were published in 2004 and eight more in 2009 Trichomatoclava Echinoconidiophorum Globoconidiopsis Globoconidium Helminthosporiomyces Microtrichosphaera Phragmoconidium and Vesiculohyphomyces The epiphytic condition of these fungi became clear in light microscope observations As the micro habitat considered has been overlooked by mycologists it is expected that this discussion will motivate further studies to reveal the real magnitude of the mycobiota associated with the plant trichomes Log in to add

    Original URL path: http://2009.botanyconference.org/engine/search/index.php?func=detail&aid=104 (2016-02-01)
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