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Showing posts with the label ECONOMIC BOTANY MATERIAL

Practical: Study of Nostoc

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 Practical: Study of Nostoc Nostoc is a filamentous, photosynthetic cyanobacterium. It commonly occurs in freshwater, moist soil, wet rocks and other damp habitats. Colonies are usually gelatinous because numerous filaments remain embedded in a mucilaginous matrix. Materials Required Fresh or preserved Nostoc material, clean glass slide, cover slip, dropper, dissecting needle, water, blotting paper and compound microscope. Procedure Take a small quantity of Nostoc colony with the help of a dissecting needle and place it on a clean glass slide. Add one or two drops of water and gently tease the material so that the filaments become separated. Place a cover slip carefully over the material without trapping air bubbles. Remove excess water with blotting paper. First observe the preparation under low power and then under high power of the compound microscope. Observations The plant body of Nostoc is thalloid and usually forms a soft, jelly-like colony. A colony contains numerous ...
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Most Common Cereals and Their Uses

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Most Common Cereals and Their Uses Cereals are the most important source of plant food to the human since since earliest time.The ancient civilizations were also dependent on several cereals. During their long period of cultivation their actual wild ancestors have been lost sight of, and countless new speciesand varieties have been evolved.In botanical literature cereals includes all the members of family Poaceae possessing the characterisiic fruit, Caryopsis. In this fruit the wall of the seed becomes fused with the ripening ovary wall to form the husk.The inseparable seed and ripening ovary wall is collectively known as “Grain”.Cereals are famous for nutritive values.These are the rich sources of carbohydrates,proteins,oils and vitamins. Cereals are widely used as principal food for almost all regions due to several reasons, viz., One or few of these cereals are available for each kind of climate; they also have a wide range of soil and moisture requirements; A little amount of l...
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