Similarities and Dissimilarities between Bacteria and Cyanobacteria
We will discuss about the similarities and Dissimilarities between Bacteria and Cyanobacteria.
- A prokaryotic nucleus carries both bacteria and cyanobacteria.
- Both are unicellular or colonial and the complicated structures are in filamentous form.
- Both groups have comparable structure of the cell wall and division of cells.
- The typical cellular organelles found in eukaryotic cells lack both.
- The genetic material is DNA without histone proteins.
- Cells have a gelatinous sheath surrounding them.
- Both have similar forms of cells, i.e. Spherical, spiral and cylindrical.
- No zoospores are formed in the blue-green algae and bacteria during asexual reproduction.
- Desiccation and high temperatures can be tolerated by members of both groups.
- Like saprophytic bacteria, in the absence of light, blue-green algae may live on dead organic matter.
- For both blue-green algae and bacteria, genetic recombination is present.
- Both bacteria nd cyanobacteria have the ability to fix nitrogen.
Dissimilarities between Cyanobacteria and Bacteria :
- While most of the bacteria are flagellate, cyanobacteria are always flagellate.
- While most bacteria are anaerobic, all cyanobacteria are aerobic.
- The cells of cyanobacteria is larger than bacteria.
- All cyanobacteria have chlorophyll for photosynthesis, while bacteria have bacteriochlorophyll.
- In bacteria, the hydrogen source is H2S, while in cyanobacteria, it is H20.
- Bacteria may be autotrophic or heterotrophic but Cyanobacteria is autotrophic.
- Bacteria Cellwall may be 1-2 layered but cell wall of Cyanobacteria is 4 layered.
- Accessory pigment is absent in bacteria while phycocyanin and phycoerythrin are present in cyanobacteria
- The reserve food material in bacteria is Glycogen while in cyanobacteria it is Cyanophycean starch.
- Heterocyst is absent in case of bacteria but is present in cyanobacteria.