|
Ocellularia Diospyri
''Ocellularia diospyri'' is a rare species of corticolous (bark-dwelling) lichen in the family Graphidaceae. It is found in northern Thailand. Taxonomy The lichen was formally described as a new species in 2002 by lichenologists Natsurang Homchantara and Brian J. Coppins. The type specimen was collected from Ton Krabak Yai National Park (Tak Province) at an elevation of about ; here, in a mixed forest, it was found growing on the trunk of a '' Diospyros'' tree. This genus is alluded to in the specific epithet ''diospyri''. The lichen is only known to occur at the type locality. Description ''Ocellularia diospyri'' has a smooth, shiny, oliveaceous thallus with a thick cortex. The apothecia occur solitarily and are immersed in the medulla. They have a diameter of 0.6–0.65 mm, with a brown, fused exciple. The columella (the sterile central axis of the apothecia) is carbonized (blackened) and is visible from the small apothecial pore; it measures 0.08–0.2 mm i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cortex (botany)
In botany, a cortex is an outer layer of a stem or root in a vascular plant, lying below the epidermis but outside of the vascular bundles. The cortex is composed mostly of large thin-walled parenchyma cells of the ground tissue system and shows little to no structural differentiation. The outer cortical cells often acquire irregularly thickened cell walls, and are called collenchyma cells. Plants Stems and branches In the three dimensional structure of herbaceous stems, the epidermis, cortex and vascular cambium form concentric cylinders around the inner cylindrical core of pith. Some of the outer cortical cells may contain chloroplasts, giving them a green color. They can therefore produce simple carbohydrates through photosynthesis. In woody plants, the cortex is located between the periderm (bark) and the vascular tissue (phloem, in particular). It is responsible for the transportation of materials into the central cylinder of the root through diffusion and may als ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichens Of Thailand
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Introduction to Lichens – An Alliance between Kingdoms . University of California Museum of Paleontology. Lichens have properties different from those of their component organisms. They come in many colors, sizes, and forms and are sometimes plant-like, but are not s. They may have tiny, leafless branches (); flat leaf-like structures ( [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichens Described In 2002
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Introduction to Lichens – An Alliance between Kingdoms . University of California Museum of Paleontology. Lichens have properties different from those of their component organisms. They come in many colors, sizes, and forms and are sometimes plant-like, but are not s. They may have tiny, leafless branches (); flat leaf-like structures ( |
Lichen Species
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Introduction to Lichens – An Alliance between Kingdoms . University of California Museum of Paleontology. Lichens have properties different from those of their component organisms. They come in many colors, sizes, and forms and are sometimes plant-like, but are not s. They may have tiny, leafless branches (); flat leaf-like structures ( |
List Of Ocellularia Species
This is a list of species in the crustose lichen genus ''Ocellularia''. , Species Fungorum accepts 343 species of ''Ocellularia''. A *'' Ocellularia abbayesiana'' *'' Ocellularia africana'' *'' Ocellularia agasthiensis'' – India *'' Ocellularia alba'' *'' Ocellularia albobullata'' *'' Ocellularia albocincta'' *'' Ocellularia albocolumellata'' – New Caledonia *'' Ocellularia albogilva'' *'' Ocellularia albomaculata'' *'' Ocellularia albothallina'' – New Caledonia *'' Ocellularia albula'' *'' Ocellularia allospora'' *'' Ocellularia allosporiza'' *'' Ocellularia americana'' *'' Ocellularia andamanica'' *'' Ocellularia annuloelevata'' – India *''Ocellularia antillensis'' *'' Ocellularia apayoensis'' *'' Ocellularia aptrootiana'' – Sri Lanka *'' Ocellularia arachchigei'' *'' Ocellularia arecae'' *'' Ocellularia ascidioidea'' *''Ocellularia auberianoides'' *''Ocellularia auratipruinosa'' – Costa Rica *''Ocellularia aurulenta'' *'' Ocellularia au ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Constictic Acid
Constictic acid is a chemical compound of the depsidone class. It was first isolated in 1968 from lichen of the genus ''Usnea''. It has since been found in many other lichen genera including ''Menegazzia'', '' Crespoa'', and ''Xanthoparmelia ''Xanthoparmelia'' (commonly known as green rock shields or rock-shield lichens) is a genus of foliose lichen in the family Parmeliaceae.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, ''Xanthoparmelia'' is syn ...''. References Lactones Benzaldehydes Heterocyclic compounds with 4 rings Phenols Methoxy compounds Benzodioxepines Lichen products {{organic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stictic Acid
Stictic acid is an aromatic organic compound, a product of secondary metabolism in some species of lichens. Stictic acid is the subject of preliminary biomedical research. Stictic acid has cytotoxic and apoptotic effects ''in vitro''. Computational studies suggest stictic acid may also stimulate p53 p53, also known as Tumor protein P53, cellular tumor antigen p53 (UniProt name), or transformation-related protein 53 (TRP53) is a regulatory protein that is often mutated in human cancers. The p53 proteins (originally thought to be, and often s ... reactivation. References Phenolic acids Phenol ethers Oxygen heterocycles Lactones Lichen products {{aromatic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secondary Metabolite
Secondary metabolites, also called specialised metabolites, toxins, secondary products, or natural products, are organic compounds produced by any lifeform, e.g. bacteria, fungi, animals, or plants, which are not directly involved in the normal growth, development, or reproduction of the organism. Instead, they generally mediate ecological interactions, which may produce a selective advantage for the organism by increasing its survivability or fecundity. Specific secondary metabolites are often restricted to a narrow set of species within a phylogenetic group. Secondary metabolites often play an important role in plant defense against herbivory and other interspecies defenses. Humans use secondary metabolites as medicines, flavourings, pigments, and recreational drugs. The term secondary metabolite was first coined by Albrecht Kossel, a 1910 Nobel Prize laureate for medicine and physiology in 1910. 30 years later a Polish botanist Friedrich Czapek described secondary metabolit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocellularia
''Ocellularia'' is a genus of lichens in the family Graphidaceae. The genus was circumscribed by Georg Friedrich Wilhelm Meyer in 1825. Species *'' Ocellularia africana'' *'' Ocellularia allosporoides'' *'' Ocellularia andamanica'' *''Ocellularia antillensis'' *'' Ocellularia aptrootiana'' *'' Ocellularia arecae'' *'' Ocellularia asiatica'' *''Ocellularia auberianoides'' *''Ocellularia auratipruinosa'' *''Ocellularia aurulenta'' *''Ocellularia bahiana'' *''Ocellularia baileyi'' *''Ocellularia balangoda'' *''Ocellularia bicuspidata'' *''Ocellularia bipindensis'' *''Ocellularia bonplandiae'' *''Ocellularia brunneospora'' *'' Ocellularia bullata'' *'' Ocellularia cameroonensis'' *'' Ocellularia cavata'' *'' Ocellularia chiriquiensis'' *'' Ocellularia clandestina'' *'' Ocellularia cloonanii'' *'' Ocellularia concolor'' *'' Ocellularia confluens'' *'' Ocellularia conglomerata'' *'' Ocellularia crocea'' *'' Ocellularia cruentata'' *'' Ocellularia decolorata'' *'' Ocellularia diacida' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Micrometre
The micrometre ( international spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is a unit of length in the International System of Units (SI) equalling (SI standard prefix "micro-" = ); that is, one millionth of a metre (or one thousandth of a millimetre, , or about ). The nearest smaller common SI unit is the nanometre, equivalent to one thousandth of a micrometre, one millionth of a millimetre or one billionth of a metre (). The micrometre is a common unit of measurement for wavelengths of infrared radiation as well as sizes of biological cells and bacteria, and for grading wool by the diameter of the fibres. The width of a single human hair ranges from approximately 20 to . The longest human chromosome, chromosome 1, is approximately in length. Examples Between 1 μm and 10 μm: * 1–10 μm – length of a typical bacterium * 3–8 μm – width of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascospore
An ascus (; ) is the sexual spore-bearing cell produced in ascomycete fungi. Each ascus usually contains eight ascospores (or octad), produced by meiosis followed, in most species, by a mitotic cell division. However, asci in some genera or species can occur in numbers of one (e.g. ''Monosporascus cannonballus''), two, four, or multiples of four. In a few cases, the ascospores can bud off conidia that may fill the asci (e.g. ''Tympanis'') with hundreds of conidia, or the ascospores may fragment, e.g. some ''Cordyceps'', also filling the asci with smaller cells. Ascospores are nonmotile, usually single celled, but not infrequently may be coenocytic (lacking a septum), and in some cases coenocytic in multiple planes. Mitotic divisions within the developing spores populate each resulting cell in septate ascospores with nuclei. The term ocular chamber, or oculus, refers to the epiplasm (the portion of cytoplasm not used in ascospore formation) that is surrounded by the "bourrelet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
