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Pseudocyphellaria Allanii
''Pseudocyphellaria allanii'' is a species of corticolous (bark-dwelling) and foliose (leafy) lichen in the family Peltigeraceae. Found in New Zealand, it was formally described as a new species in 1982 by Bernd Renner and David Galloway. The type specimen was collected by Galloway on the path to Emily Falls on Mount Peel (South Canterbury); here it was found growing on a fallen ''Pseudowintera'' on a stream bank. The lichen contains the secondary compounds 7β-acetoxyhopan-22-ol and hopan-15α-22-diol, which are derivatives of the triterpene compound hopane. The specific epithet ''allanii'' honours New Zealand botanist Harry Allan Harry Howard Barton Allan (27 April 1882 – 29 October 1957) was a New Zealand teacher, botanist, scientific administrator, and writer. Despite never receiving a formal education in botany, he became an eminent scientist, publishing ove ..., who "described the vegetation of Mt Peel, and who later promoted interest in New Zealand lichens" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corticolous Lichen
A corticolous lichen is a lichen that grows on bark.Alan Silverside's Lichen Glossary (a-f), Alan Silverside/ref> This is contrasted with lignicolous lichen, which grows on wood that has had the bark stripped from it,Alan Silverside's Lichen Glossary (g-o), Alan Silverside/ref> and saxicolous lichen, which grows on rock.Alan Silverside's Lichen Glossary (p-z), Alan Silverside/ref> Examples of corticolous lichens include the crustose lichen ''Graphis plumierae'', foliose lichen ''Melanohalea subolivacea'' and the fruticose ''Bryoria fuscescens ''Bryoria fuscescens'' is a species of lichen of the family Parmeliaceae. As of July 2021, its conservation status has not been estimated by the IUCN. In Iceland, where it grows as an epiphyte on downy birch stems and branches, it is classified ...''.Náttúrufræðistofnun Íslands celandic Institute of Natural History(1996). Válisti 1: Plöntur.' (in Icelandic) Reykjavík: Náttúrufræðistofnun Íslands. References Lichenolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Derivative (chemistry)
In chemistry, a derivative is a compound that is derived from a similar compound by a chemical reaction. In the past, derivative also meant a compound that ''can be imagined to'' arise from another compound, if one atom or group of atoms is replaced with another atom or group of atoms, but modern chemical language now uses the term structural analog for this meaning, thus eliminating ambiguity. The term "structural analogue" is common in organic chemistry. In biochemistry, the word is used for compounds that at least theoretically can be formed from the precursor compound. Chemical derivatives may be used to facilitate analysis. For example, melting point (MP) analysis can assist in identification of many organic compounds. A crystalline derivative may be prepared, such as a semicarbazone or 2,4-dinitrophenylhydrazone (derived from aldehydes or ketones), as a simple way of verifying the identity of the original compound, assuming that a table of derivative MP values is available ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichens Described In 1982
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 ( |
Pseudocyphellaria
''Pseudocyphellaria'' is a genus of large, leafy lichens that are sometimes referred to as "specklebelly" lichens.Brodo, I. M., S. D. Sharnoff, and S. Sharnoff. 2001. ''Lichens of North America''. Yale University Press: New Haven. The genus has a widespread distribution, especially in south temperate regions, and contains about 170 species. They resemble ''Lobaria'', except that most species of ''Pseudocyphellaria'' have conspicuous pseudocyphellae on their lower surface, a characteristic that was once considered unique to this genus. Some species contain pulvinic acid-related pigments; in these species the soredia and pseudocyphellae can be bright yellow. Taxonomy ''Pseudocyphellaria'' was originally circumscribed in 1890 by Finnish lichenologist Edvard August Vainio, with ''P. aurata'' as the type species. In the 2010s, molecular phylogenetic analyses showed that this species, along with a few others, nested within a small clade separate from most ''Pseudocyphellaria''. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harry Allan
Harry Howard Barton Allan (27 April 1882 – 29 October 1957) was a New Zealand teacher, botanist, scientific administrator, and writer. Despite never receiving a formal education in botany, he became an eminent scientist, publishing over 100 scientific papers, three introductory handbooks on New Zealand plants, and completing the first volume of a flora in his lifetime. Born in Nelson, he was educated at Nelson College and later Auckland University College, from which he graduated MA in 1908. He worked for many years as a teacher of English and agricultural studies at secondary schools around New Zealand. Throughout his teaching career, he became increasingly interested in and knowledgeable of botany, and wrote several articles in academic journals. He often collaborated and spoke with botanists, such as Alfred and Leonard Cockayne. For his lengthy botanical study of Mount Peel, he was awarded the degree of Doctor of Science (DSc) in 1923. He became a member of the Linn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botanical Name
A botanical name is a formal scientific name conforming to the '' International Code of Nomenclature for algae, fungi, and plants'' (ICN) and, if it concerns a plant cultigen, the additional cultivar or Group epithets must conform to the ''International Code of Nomenclature for Cultivated Plants'' (ICNCP). The code of nomenclature covers "all organisms traditionally treated as algae, fungi, or plants, whether fossil or non-fossil, including blue-green algae ( Cyanobacteria), chytrids, oomycetes, slime moulds and photosynthetic protists with their taxonomically related non-photosynthetic groups (but excluding Microsporidia)." The purpose of a formal name is to have a single name that is accepted and used worldwide for a particular plant or plant group. For example, the botanical name ''Bellis perennis'' denotes a plant species which is native to most of the countries of Europe and the Middle East, where it has accumulated various names in many languages. Later, the plant was intro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hopane
Hopane is a natural chemical compound classified as a triterpene. It forms the central core of a variety of other chemical compounds which are collectively known as hopanoids. The first compound of the hopane family to be isolated and characterised was hydroxyhopanone, found in dammar resin. The name derives from ''Hopea'', a tree genus from which dammar is obtained. See also * Bacteriohopanepolyol Bacteriohopanepolyols (BHPs), bacteriohopanoids, or bacterial pentacyclic triterpenoids are commonly found in the lipid cell membranes of many bacteria. BHPs are frequently used as biomarkers in sedimentary rocks and can provide paleoecological inf ... References Triterpenes Hydrocarbons Cyclopentanes Isopropyl compounds {{organic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triterpene
Triterpenes are a class of chemical compounds composed of three terpene units with the molecular formula C30H48; they may also be thought of as consisting of six isoprene units. Animals, plants and fungi all produce triterpenes, including squalene, the precursor to all steroids. Structures Triterpenes exist in a great variety of structures. Nearly 200 different skeletons have been identified. These skeletons may be broadly divided according to the number of rings present. In general pentacyclic structures (5 rings) tend to dominate. Squalene is biosynthesized through the head-to-head condensation of two farnesyl pyrophosphate units. This coupling converts a pair of C15 components into a C30 product. Squalene serves as precursor for the formation of many triterpenoids, including bacterial hopanoids and eukaryotic sterols. Triterpenoids By definition triterpenoids are triterpenes that possess heteroatoms, usually oxygen. The terms ''triterpene'' and ''triterpenoid'' oft ... [...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] |
Foliose Lichen
Foliose lichen is one of the morphological classes of lichens, which are complex organisms that arise from the symbiotic relationship between fungi and a photosynthetic partner, typically algae. This partnership allows lichen to live in diverse climates that can range from cold, dry mountains to wet, warm valleys. Lichens develop quite slowly with recorded growth rates of 0.01–27mm/year depending on the species. Their lifespan averages between 30 and 60 years. Lichens have a main body part called the thallus, which is composed of hyphae, and houses the cortex and medulla. The cortex contains the photosynthetic cells while the medulla allows for gas exchange and makes up the bulk of the lichen's thallus. There are three main types of lichens: crustose, foliose, and fruticose. Foliose lichen are characterised by flattened leafy thalli, and an upper and lower cortex. Many have numerous layers, which are stratified, and aid in identifying different types. Foliose lichens attach to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudowintera
''Pseudowintera'' is a genus of woody evergreen flowering trees and shrubs, part of family Winteraceae. The species of ''Pseudowintera'' are native to New Zealand. Winteraceae are magnoliids, associated with the humid Antarctic flora of the southern hemisphere. Horopito can be chewed for a hot, peppery taste. *'' Pseudowintera axillaris'', is known as the lowland horopito. It is a shrub or small tree growing up to eight metres tall in lowland and lower montane forests from 35° to 42° South. In the South Island it grows West of the Main Divide. *''Pseudowintera colorata'', or mountain horopito, is an evergreen shrub or small tree (1–2.5 m) commonly called pepperwood because its leaves have a very hot bite. Its yellow and green leaves are blotched with red; new leaves in the spring are bright red. It is widespread throughout New Zealand, from lowland forests to higher montane forests, and from 36° 30' South as far southwards as Stewart Island/Rakiura. Because of its various use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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