2. Actinobacteria
The Actinobacteria are a phylum of Gram-positive
bacteria.
They can be terrestrial or aquatic.
They are of great economic importance to humans.
In soil, they behave much like fungi.
Some soil actinobacteria symbiosis with plants.
3. Nature of Cell
Gram Positive prokaryotic bacteria.
It consist branched filamentous hyphae having
resemblance with fungal hyphae.
It reproduce asexually by spore formation.
They are saprophytic and chemoorganotrophic in
nature.
They are free living and found in both land and
water.
They shows symbiotic relationship with plants.
4. Cell Structure
Thick peptidoglycan layer present in the cell wall.
Actinobacteria have high guanine (G) plus cytosine (C)
(G+C) DNA base content in their genome.
The cell is able to change its shape.
Chromosome is organized in prokaryotic nucleoid.
Some have mycolic acid in their cell wall.
10. Economic Importance
Positive Negative
Production of antibiotics
like Streptomycin
Nitrogen fixation in plants
by Frankia sp.
Production of Probiotics
Production of enzymes
Causes scab disease in
potato
Causes chronic infection in
human
They causes earthy odour
of moist soil
They causes cutaneous,
subcutaneous lesion,
pulmonary infections etc.