The term "Lithotroph" is created from the terms ' lithos' (rock) and ' troph' (consumer), meaning the "eaters of rock. " Many lithoautotrophs are extremophiles, but this is not universally so. Known lithotrophs are exclusively microbes or plants; No known macrofauna possesses the ability to utilize inorganic compounds as energy sources. A lithotroph is an organism that uses an inorganic substrate (usually of mineral origin) to obtain reducing equivalents for use in biosynthesis (e. g. , carbon dioxide fixation) or energy conservation via aerobic or anaerobic respiration. Lithotrophs belong to either the domain Bacteria or the domain Archaea. Macrofauna and lithotrophs can form symbiotic relationships, in which case the lithotrophs are called "prokaryotic symbionts. " An example of this is chemolithotrophic bacteria in deep sea worms or plastids, which are organelles within plant cells that may have evolved from photolithotrophic cyanobacteria-like organisms.
|Формат:|| Страниц 132|
Книга по Требованию