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.
- The process in green plants and certain other organisms by which carbohydrates are synthesized from carbon dioxide and water using light as an energy source. Most forms of photosynthesis release oxygen as a byproduct.
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പ്രകാശോര്ജ്ജം ഉപയോഗിച്ച് ക്ലോറോഫില് മുഖേന സസ്യങ്ങള് സങ്കീര്ണ്ണയൗഗികങ്ങള് നിര്മ്മിക്കുന്ന വിധം - Prakaashorjjam Upayogichu Klorophil Mukhena Sasyangal Sankeernnayaugikangal Nirmmikkunna Vidham | Prakashorjjam Upayogichu Klorophil Mukhena Sasyangal Sankeernnayougikangal Nirmmikkunna Vidham ;ഛായാഗ്രഹണം - Chaayaagrahanam | Chayagrahanam ;പ്രകാശസംശ്ലേഷണം - Prakaashasamshleshanam | Prakashasamshleshanam ;