However, the mode and mechanism of division also help influence the type of shape that a given type of bacteria will have.įor Streptococcus pneumoniae, as is the case with the other diplococci bacteria, division occurs in the parallel plane perpendicular to the long axis.ĭuring cell division, the site of division is first marked by the equatorial ring (also known as the wall band). Here, it's worth noting that unlike most eukaryotic cells that tend to be irregular in shape, bacteria tend to have a regular shape (spherical, rod-like, etc).įor bacteria, the shape is defined and maintained by the cell wall (which consists of peptidoglycan, a cross-linked polymer). For coccoids (truly round bacteria) like Staphylococcus aureus and micrococcus, the cell division machinery is responsible for the synthesis of septal peptidoglycan and thus the growth of the cell wall.įor ovococcoid bacteria, like some diplococci, synthesis of the cell wall occurs through the cell division machinery that is responsible for synthesis of the septal peptidoglycan and the elongation complex responsible for the peripheral peptidoglycan. As such, they are often described as having an ovococcoid shape.īased on various studies, this shape is attributed to two distinct peptidoglycan machineries. As such, some species may not be truly round as is the case with staphylococci bacteria. Enterococcus - some species occur in pairs (while others form short chains)Īs mentioned, diplococci bacteria may appear rounded or elongated in shape.Streptococcus pneumoniae - usually occur in pairs.Neisseria cinerea and Neisseria gonorrhea Some examples of diplococci bacteria include: There are both Gram-positive and Gram-negative bacteria that are responsible for various infections in human beings.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |