senescence

Cultivation of human viruses

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The cultivation of viruses from material taken from lesions is an important step in the diagnosis of many viral diseases. Studies of the basic biology and multiplication processes of human viruses also require that they are grown in the laboratory under experimental conditions. Human pathogenic viruses can be propagated in three types of cell systems. … Read more

Plant hormones ( Phytohormones )

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Organic compounds produced within the plants body. Regulates growth and development in plants. Move from the site of production to the site of action. Mainly produced in apical bud, young leaves, root tip, embryo, etc. Important characters Produced at the apices of roots, stems and leaves. Transported to other parts of the plants through phloem. … Read more