What are the characteristics of Bacillus subtilis?

Characteristics of B. subtilis

  • Rod-shaped bacterium that forms small clumps or chains, or stays by itself.
  • Gram positive.
  • Has a single circular chromosome that is located in the nucleoid region of the cytoplasm.
  • Peritrichous flagella, or little tails, covering the cell.
  • Forms endospores.
  • Heterotrophic.
  • Facultative anaerobe.

Is Bacillus subtilis Gram-positive or Gram-negative?

Bacillus subtilis is the best-characterized member of the Gram-positive bacteria.

How do you identify Bacillus?

Bacillus species are rod-shaped, endospore-forming aerobic or facultatively anaerobic, Gram-positive bacteria; in some species cultures may turn Gram-negative with age. The many species of the genus exhibit a wide range of physiologic abilities that allow them to live in every natural environment.

What are five characteristics of bacterial colony morphology?

Colonies are described on the basis of size, shape, texture, elevation, pigmentation, and effect on growth medium. In this blog post, you will find common criteria that are used to characterize the bacterial growth.

Why Bacillus subtilis is Gram-positive?

Bacillus subtilis, known also as the hay bacillus or grass bacillus, is a Gram-positive, catalase-positive bacterium, found in soil and the gastrointestinal tract of ruminants and humans….

Bacillus subtilis
Phylum: Firmicutes
Class: Bacilli
Order: Bacillales
Family: Bacillaceae

Why is Bacillus subtilis a model organism?

Bacillus subtilis is the best studied model organism of the Gram-positive lineage. It is naturally transformable and has an extremely powerful genetic toolbox. It is an important industrial organism, being proficient at secreting proteins and making small fine chemicals, as well as acting as a plant growth promoter.

Is Bacillus subtilis mannitol positive?

When the Bacillus subtilis was isolated on the Mannitol Salt Agar plate, the color of the plate also changed from red to yellow. Bacillus subtilis is not able to ferment mannitol and yet the Mannitol test yielded a positive result.

Is Bacillus subtilis aerobic or anaerobic?

The Gram-positive soil bacterium Bacillus subtilis, generally regarded as an aerobe, grows under strict anaerobic conditions using nitrate as an electron acceptor and should be designated as a facultative anaerobe.

What shape are the bacteria classified as Bacillus subtilis?

Bacillus subtilis, known also as the hay bacillus or grass bacillus, is a Gram-positive, catalase-positive bacterium, found in soil and the gastrointestinal tract of ruminants and humans. A member of the genus Bacillus, B. subtilis is rod-shaped, and can form a tough, protective endospore, allowing it to tolerate extreme environmental conditions.

How is Bacillus subtilis used as a model organism?

Bacillus subtilis is one of the best characterized bacteria and is used as a model organism for Gram-positive bacteria. B. subtilis is a rod-shaped bacterium, which produces endospores that allow the survival of extreme environmental conditions including heat and desiccation.

What kind of material does Bacillus subtilis degrade?

Bacillus subtilis can also degrade polyethylene (plastic polymers). B. subtilis and a few other bacteria types are abel to use polyethylene as their only carbon (energy) source. As these bacteria extract carbon and produce heat, the plastic polymers slowly degrade.

What does a bacillus sp.colony look like?

Colony: Colony morphology is highly variable and depends on various strains and the species. Large to very large, grey white colonies, maybe dry in appearance or may look wet and blistery have been observed. Liquid growth: Growth is uniform and solution appears turbid.