autotroph
au·to·troph
A0540600 (ô′tə-trŏf′, -trōf′)au•to•troph
(ˈɔ təˌtrɒf, -ˌtroʊf)n.
autotroph
| Noun | 1. |  autotroph - plant capable of synthesizing its own food from simple organic substances |
| 单词 | autotroph | |||
| 释义 | autotrophau·to·trophA0540600 (ô′tə-trŏf′, -trōf′)au•to•troph(ˈɔ təˌtrɒf, -ˌtroʊf)n. autotroph
autotrophautotroph(ôt`ətrōf'), in biology, an organism capable of synthesizing its own organic substances from inorganic compounds. Autotrophs produce their own sugars, lipids, and amino acids using carbon dioxide as a source of carbon, and ammonia or nitrates as a source of nitrogen. Organisms that use light for the energy to synthesize organic compounds are called photosynthetic autotrophs; organisms that oxidize such compounds as hydrogen sulfide (H2S) to obtain energy are called chemosynthetic autotrophs, or chemotrophs. Photosynthetic autotrophs include the green plants, certain algae, and the pigmented sulfur bacteria (see photosynthesisphotosynthesis, process in which green plants, algae, and cyanobacteria utilize the energy of sunlight to manufacture carbohydrates from carbon dioxide and water in the presence of chlorophyll. Some of the plants that lack chlorophyll, e.g. ..... Click the link for more information. ). Chemotrophs include the iron bacteria, the nitrifying bacteria, and the nonpigmented sulfur bacteria (see chemosynthesischemosynthesis, process in which carbohydrates are manufactured from carbon dioxide and water using chemical nutrients as the energy source, rather than the sunlight used for energy in photosynthesis. Much life on earth is fueled directly or indirectly by sunlight. ..... Click the link for more information. ). Heterotrophsheterotroph , living organism that obtains its energy from carbohydrates and other organic material. All animals and most bacteria and fungi are heterotrophic. In contrast, autotrophs are organisms that use inorganic substances as energy sources and carbon dioxide as a carbon source. ..... Click the link for more information. are organisms that must obtain their energy from organic compounds. autotroph[′ȯd·ō‚träf]autotrophautotroph[aw´to-trōf]au·to·troph(aw'tō-trōf),autotroph(ô′tə-trŏf′, -trōf′)au·to·troph(aw'tō-trōf)autotrophan organism that can manufacture its own organic requirements from inorganic materials independent of other sources of organic substrates. Autotrophs are either phototrophic (see PHOTOAUTOTROPH or CHEMOAUTOTROPHIC, energy being derived either by photosynthesis where chlorophyll is present, or from inorganic oxidation where it is absent (e.g. hydrogen sulphide is oxidized by sulphur bacteria). Autotrophs are primary producers (see PRIMARY PRODUCTION). Compare HETEROTROPH.autotroph
Synonyms for autotroph
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