منابع مشابه
Lichens
What are lichens? The term lichen refers to a symbiotic association between a filamentous fungus, the ‘mycobiont’, and at least one photosynthetic organism, the ‘photobiont’, consisting of a micro alga, a cyanobacterium, or both (Figure 1). Although the symbiotic nature of lichens was first revealed in 1867, the development of a lichen thallus is often so integrated (Figure 1D) that they have b...
متن کاملStudies on the Chemistry of Lichens
The Norwegian lichen species Lecanora (Aspicilia) Myrinii has been chemically investigated with regard to its content of aromatic lichen compounds, hydroxy fatty acids, soluble and bound sugars, and amino acids. Norstictic acid and a tetrahydroxy fatty acid have been isolated. In addition to these two compounds, free galactose, glucose, mannose, sucrose, fructose and 33 ninhydrin-positive compo...
متن کاملlichens on extensive green roofs : evapotranspiration , Cladonia
Green roofs are constructed ecosystems that provide ecosystem services in urban environments. Shallow substrate green roofs subject the vegetation layer to desiccation and other environmental extremes, so researchers have evaluated a variety of stress-tolerant vegetation types for green roof applications. Lichens can be found in most terrestrial habitats. They are able to survive extremely har...
متن کاملOn the Inside Photoprotection in Lichens
Lichens are often found growing on exposed rocks or trees, where they face high levels of irradiation while in the desiccated state. To grow and survive, lichens must resist photodamage while desiccated and resume photosynthesis soon after hydration. Since PSII is often a target of desiccation-induced damage, lichens must render PSII largely inactive and/or minimize the amount of solar radiatio...
متن کاملLichens survive in space: results from the 2005 LICHENS experiment.
This experiment was aimed at establishing, for the first time, the survival capability of lichens exposed to space conditions. In particular, the damaging effect of various wavelengths of extraterrestrial solar UV radiation was studied. The lichens used were the bipolar species Rhizocarpon geographicum and Xanthoria elegans, which were collected above 2000 m in the mountains of central Spain an...
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ژورنال
عنوان ژورنال: Annals and Magazine of Natural History
سال: 1877
ISSN: 0374-5481
DOI: 10.1080/00222937708682253