Photosynthetic
Photosynthesis Pho`to*syn"the*sis, n. (Plant Physiol.) The process of constructive metabolism by which carbohydrates are formed from water vapor and the carbon dioxide of the air in the chlorophyll-containing tissues of plants exposed to the action of light. It was formerly called {assimilation}, but this is now commonly used as in animal physiology. The details of the process are not yet clearly known. Baeyer's theory is that the carbon dioxide is reduced to carbon monoxide, which, uniting with the hydrogen of the water in the cell, produces formaldehyde, the latter forming various sugars through polymerization. Vines suggests that the carbohydrates are secretion products of the chloroplasts, derived from decomposition of previously formed proteids. The food substances are usually quickly translocated, those that accumulate being changed to starch, which appears in the cells almost simultaneously with the sugars. The chloroplasts perform photosynthesis only in light and within a certain range of temperature, varying according to climate. This is the only way in which a plant is able to organize carbohydrates. All plants without a chlorophyll apparatus, as the fungi, must be parasitic or saprophytic. -- {Pho`to*syn*thet"ic}, a. -- {Pho`to*syn*thet"ic*al*ly}, adv. [Webster 1913 Suppl.]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • photosynthetic — Able to use sunlight energy to convert atmospheric carbon dioxide into organic compounds. Nearly all plants, most algae and some bacteria are photosynthetic …   Glossary of Biotechnology

  • photosynthetic — photosynthesis ► NOUN ▪ the process by which green plants use sunlight to synthesize nutrients from carbon dioxide and water. DERIVATIVES photosynthesize (also photosynthesise) verb photosynthetic adjective …   English terms dictionary

  • photosynthetic — adjective see photosynthesis …   New Collegiate Dictionary

  • photosynthetic — See photosynthesis. * * * …   Universalium

  • photosynthetic — adjective of, relating to, or employing photosynthesis …   Wiktionary

  • photosynthetic — adj. (Biology) concerning photosynthesis, pertaining to the use of sunlight to produce carbohydrates (esp. in plants) …   English contemporary dictionary

  • photosynthetic — pho·to·synthetic …   English syllables

  • photosynthetic — adjective relating to or using or formed by photosynthesis • Ant: ↑nonphotosynthetic • Pertains to noun: ↑photosynthesis • Derivationally related forms: ↑photosynthesis * * * photosynthetˈic adjective …   Useful english dictionary

  • Photosynthetic picoplankton — is the fraction of the plankton performing photosynthesis composed by cells between 0.2 and 2 µm (picoplankton). It is especially important in the central oligotrophic regions of the world oceans that have very low concentration of nutrients.… …   Wikipedia

  • Photosynthetic reaction center protein family — Pfam box Symbol = Photo RC Name = Photosynthetic reaction centre protein width = caption = Pfam= PF00124 InterPro= IPR000484 SMART= PROSITE = PDOC00217 SCOP = 1prc TCDB = 3.E.2 OPM family= 2 OPM protein= 1dxr PDB=PDB3|1cltM:37 306 PDB3|4prcM:37… …   Wikipedia

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