Organic and Inorganic Constituent in Essential in Plants and Nutrients Required to Plants

3724 Words Apr 28th, 2011 15 Pages
ORGANIC AND INORGANIC CONSTITUENT IN ESSENTIAL IN PLANTS AND NUTRIENTS REQUIRED TO PLANTS
Organic constituent
DEFINITION
An organ, system, or other discrete element of an organism the part of the plant that carries out photosynthesis.
EXPLANATION: The chemical compounds of living things are known as organic compounds because of their association with organisms. Organic compounds, which are the compounds associated with life processes, are the subject matter of organic chemistry. Among the numerous types of organic compounds, four major categories are found in all living things: carbohydrates, lipids, protein, and nucleic acids.
Carbohydrates
Almost all organisms use carbohydrates as sources of energy. In addition, some carbohydrates
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Such nutrients are termed macronutrients, where the prefix macro- (large) refers to the quantity needed, not the size of the nutrient particles themselves. Other nutrients, called micronutrients, are required only in trace amounts for plants to remain healthy. Such micronutrients are usually absorbed as ions dissolved in water taken from the soil, though carnivorous plants acquire some of their micronutrients from captured prey. The following tables list element nutrients essential to plants. Uses within plants are generalized.
Macronutrients. (Necessary in large quantities)
Element Form of uptake Notes
Nitrogen NO3–, NH4+ Nucleic acids, proteins, hormones, etc.
Oxygen O2 H2O Cellulose, starch, other organic compounds
Carbon CO2 Cellulose, starch, other organic compounds
Hydrogen H2O Cellulose, starch, other organic compounds
Potassium K+ Cofactor in protein synthesis, water balance, etc.
Calcium Ca2+ Membrane synthesis and stabilization
Magnesium Mg2+ Element essential for chlorophyll
Phosphorus H2PO4– Nucleic acids, phospholipids, ATP
Sulfur SO42– Constituent of proteins and coenzymes
Micronutrients. (Necessary in small quantities)
Element Form of uptake Notes
Chlorine Cl- Photosystem II and stomata function
Iron Fe2+, Fe3+ Chorophyll formation
Boron HBO3 Crosslinking pectin
Manganese Mn2+ Activity of some enzymes
Zinc Zn2+ Involved in the synthesis of enzymes and chlorophyll
Copper Cu+ Enzymes for lignin synthesis
Molybdenum MoO42- Nitrogen