plant physiology

2008-02-26T08:17:06+01:00

Physiology of Plant
Living organisms are extremely complex function system. An important group of these consists of plant, which have the capability to synthesize organic compounds from two basic raw material water and carbon dioxide, using the energy trapped from sunlight. They must be able to transport water, minerals and processed organic compounds to different parts of their body. Existence of all other organism depends on this capability of plants, but the organisms that derive their food directly or indirectly from plants need to have mechanism to digest this food and eliminate the toxic waste.
Plants germinate from seeds, grow, develop mature, reproduce, and die. Plant physiology is the study of these processes. In other words, plant physiology deals with how plant function. Plants are autographs and make their own food by utilizing carbon dioxide, sun light and water. But before plants become photo synthetically component after the emergence of leaves, the germinating plants get their food from reserves in the cotyledons as in peas and beans. As the plant grow, the rate of food production is shifted from cotyledons to fully exposed leaves, which take variety of shapes and sizes, and carry the process of photosynthesis. It is said that “only the sun gives without taking.” And plants play a big role in this process. The sun energy is converted to ATP, which is necessary for conversion of carbon dioxide to carbohydrates. The carbohydrates (glucose, sucrose or starch) are utilize in respiration by themselves (and also by animal which eat plants) to form ATP that provides the energy necessary for life’s function. The process of respiration that produces ATP uses oxygen that is released during photosynthesis. It is this oxygen that changed the atmosphere from one full of hydrogen to one rich in oxygen. Plants possess the capability of taking up nitrogen & other nutrients, along with water, from the soil through an elaborate root system. The inorganic and organic nutrients act as building blocks and help plants grow & reproduce. All these activities in plants, like any other living organism, follow the known chemical and physical laws.

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