Bacterial vs Fungal Colonies Bacterial colonies are the visible masses of bacterial cells on solid media. Bacteria are tiny microscopic organisms which can be seen only under the microscope. Surface - How does the surface of the colony appear? Hyphae of fungi run all over the solid media forming rhizoid or filamentous colonies.
Opacity - For example, transparent clearopaque, translucent almost clear, but distorted vision, like looking through frosted glassiridescent changing colors in reflected lightetc. Turn the Petri dish on end. For example, smooth, glistening, rough, dull opposite of glisteningrugose wrinkledetc.
Elevation - What is the cross sectional shape of the colony? All bacteria have a rigid cell wall, meaning they maintain a definite cell shape. You can detect these rings under a microscope. It is assumed that one bacterial colony arises from a single bacterial cell and is multiplied by binary fission into many bacteria.
Mycelium and spore colours also greatly differ among the fungal species. The characteristics of a colony shape, size, pigmentation, etc. Although bacterial and fungi colonies have many characteristics and some can be rare, there are a few basic elements that you can identify for all colonies: Coli Cells Bacteria are unicellular microorganisms with no chlorophyll pigments.
Colony morphology is a way scientists can identify bacteria. Bacterial colonies differ in the colony size, shape, colour, texture, elevation, margins, appearance of the surface, opacity, etc.Form of the bacterial colony: – The form refers to the shape of the colony.
These forms represent the most common colony shapes you are likely to encounter.
e.g. Different types of bacteria will produce different-looking colonies, some colonies may be coloured, some colonies are circular in shape, and others are irregular.
A specific terminology is used to describe common colony types. These are: Form - What is the basic shape of. Colony Morphology: Describing Bacterial Colonies_____ Frequently during the semester you will need to describe bacterial (or following outline will be helpful for verbally communicating the appearance of observed colonial growth.
1. Form – The form refers to the shape of the colony. These forms Surface – Bacterial colonies are. Nine obviously different colonies are numbered: some colony types recur in various areas of the plate (note # 3 and # 4). Not only are pigment differences seen, but also size, edge, pattern, opacity, and shine.
Two circles have been drawn around merging colonies, where the species of the 2 colonies are different. Bacteria grow tremendously fast when supplied with an abundance of nutrients.
Different types of bacteria will produce different-looking colonies, some colonies may be colored, some colonies are circular in shape, and others are irregular. The characteristics of a colony (shape, size, pigmentation, etc.) are termed the colony morphology.
Colonies that differ in appearance are typically different bacterial strains, species, or genera. However, colony morphology is not a reliable way to identify bacteria, as many different types of bacteria have similar colony morphology.Download