Tree canopy biodiversity in the Great Smoky Mountains National Park: ecological and developmental observations of a new myxomycete species of Diachea
| Autor: | Uno Eliasson, Thomas W. Gaither, Harold W. Keller, Melissa Skrabal |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
0106 biological sciences
0301 basic medicine Peridium Tree canopy biology Physiology Ecology Sporangium Biodiversity Cell Biology General Medicine 030108 mycology & parasitology Fraxinus biology.organism_classification 010603 evolutionary biology 01 natural sciences Species description 03 medical and health sciences Taxon Botany Genetics Lichen Molecular Biology Ecology Evolution Behavior and Systematics |
| Zdroj: | Mycologia. 96:537-547 |
| ISSN: | 1557-2536 0027-5514 |
| DOI: | 10.1080/15572536.2005.11832952 |
| Popis: | A survey and inventory of tree canopy bio? diversity for cryptogams (myxomycetes, macrofungi, mosses, liverworts, lichens and ferns) in the Great Smoky Mountains National Park resulted in the dis- covery of an undescribed myxomycete species. This taxon is classified in the order Physarales, family Di- dymiaceae and genus Diachea. A combination of morphological characteristics distinguishes Diachea arboricola H.W. Keller & M. Skrabal sp. nov. from all other species in the genus: peridium iridescent gold to silvery gray; stalk reddish orange above and whitish below, filled with crystals; capillitial threads stiff, di- chotomously branched and arising from the tip of the columella; spore ornamentation uniformly cov- ering the entire spore surface, appearing spiny with light microscopy, with scanning electron microscopy as vertical processes with capitate, clustered, spike- like tips. This type of spore ornamentation has not been found in any other Diachea species. Diachea ar? boricola is known only from the tree canopy, ranging in height from roughly 3 to 21 m, on three tree spe? cies, Fraxinus americana, Juniperus virginiana and Quercus alba. Observations of plasmodial growth and fruiting body development are described based on moist chamber cultures. Tree canopy observations in situ suggest that the plasmodium of this species mi- grates over extensive vertical areas of tree bark. Eco? logical factors are discussed that include pH of bark substrata. The species description is based on abun? dant sporangia from 17 different collections. A key |
| Databáze: | OpenAIRE |
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