Posted inMicrobiology

Different Systems of Classification

Early Taxonomists 2000 years ago, Aristotle was the first taxonomist Aristotle divided organisms into plants & animals He subdivided them by their habitat ---land, sea, or air dwellers. Biological classification…
Posted inMicrobiology

Introduction to Microbiology

Microorganisms are present everywhere on earth which includes humans, animals, plants and other living creatures, soil, water and atmosphere  MICROBIOLOGY : the study of small living things. MICRO = small, BIO…
Posted inCell Biology

TRANSPORT ACROSS PLASMA MEMBRANE

Membrane Function Membranes organize the chemical activities of cells. The outer plasma membrane – forms a boundary between a living cell and its surroundings – Exhibits selective permeability Controls traffic…
Posted inBiotechnology

BACTERIOPHAGE VECTORS

BACTERIOPHAGE Virus that infect bacteria is known as bacteriophage. It was discovered by Frederick W.Twort and Felix d’ Herelle . D’ Herelle coined the term bacteriophage meaning ‘bacterial eater’ to…
Posted inPlant Pathology

Brown or leaf rust of wheat

Puccinia triticina (P. recondita) DISEASE:  Leaf or Brown rust PATHOGEN:  Puccinia triticina (Syn. Puccinia recondita f. sp. tritici) HOSTS: Wheat, barley and  common Barberry (Berberis, Mahoberberis and Mahonia spp.) Symptoms The most common…
Posted inPlant Pathology

LATE BLIGHT OF POTATO

The disease was recorded simultaneously in Europe and North America in 1830. It became very well established in Europe by 1842 and was one of the important causes of the…
Posted inPlant Pathology

EARLY BLIGHT OF POTATO

POTATO •A member of the Solanaceae family, the cultivated potato (Solanum tuberosum) is closely related to the tomato, pepper, and eggplant. •Indians in Peru were the first people to cultivate…
Posted inPlant Pathology

Loose smut of wheat

Ustilago triticOrder: Ustilaginales Family: Ustilaginaceae Blossom penetration type Smut mean sooty (black) or charcoal like powder Responsible for heavy losses when susceptible varieties with infected seeds are grown year after year…