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Mollicutes: General Characteristics

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Questions and Answers

What distinguishes MOLLICUTES from bacteria?

Ability to grow on artificial media

Gram-positive staining

Absence of true cell wall (correct)

Presence of cross walls

How are phytoplasmas distinguished in terms of cell wall structure?

Possess peptidoglycan cell walls

Lack a true cell wall (correct)

Contain cellulose cell walls

Have gram-positive cell walls

Which statement is true regarding the reproduction of phytoplasmas?

Reproduce by forming spores

Have flagella for motility

Multiply through binary transverse fission (correct)

Require artificial media for growth

What is a distinguishing feature of spiroplasmas regarding shape?

Helical and branched nonhelical filaments (A) Signup and view all the answers

How do spiroplasmas move within their environment?

By a slow undulation of the filament (B) Signup and view all the answers

Why are phytoplasmas unable to be grown on artificial media?

Absence of a cell wall (A) Signup and view all the answers

Where are phytoplasma and spiroplasma present?

In the sap of the phloem sieve tubes (B) Signup and view all the answers

How are phytoplasma and spiroplasma transmitted from plant to plant?

Mainly by leafhoppers (A) Signup and view all the answers

What is required for the vector to transmit mollicutes after feeding on infected plants?

An incubation period of 10 to 45 days (B) Signup and view all the answers

Where does the mollicute multiply first within the insect vector if acquired from the plant?

In the intestinal cells (A) Signup and view all the answers

When do more insects become vectors for mollicutes?

When feeding on young leaves and stems of infected plants (D) Signup and view all the answers

What body parts of the insect vectors can phytoplasma and spiroplasma grow in?

Alimentary canal, hemolymph, salivary glands, intracellularly in various body organs (D) Signup and view all the answers