Question

Which of the following can be used as a biocontrol agent in the treatment of plant disease?

• A. Lactobacillus
• B. Trichoderma
• C. Chlorella
• D. Anabaena

Answer 1

The correct option is B

Trichoderma

The correct option is B

Explanation of the correct option:

1. Trichoderma is a fungus.
2. It is used to combat plant diseases as a biocontrol agent.
3. It's a free-living fungus that thrives on the root surface.
4. Trichoderma strains have the ability to suppress fungal phytopathogens directly through mycoparasitism or indirectly through nutrition and space competition, environmental change, or promotion of plant development and defense mechanisms.
5. Trichoderma possesses a variety of processes that are particularly beneficial to plants, including those that increase plant growth, improve the solubilization of mineral nutrients, stimulate the creation of secondary metabolites and growth-regulating chemicals, boost plant defense, and create siderophores.

Explanation of the incorrect options:

Option A:

1. Humans' urinary and digestive systems contain probiotics of the Lactobacillus genus.
2. Diarrhea can be treated with them, and they can also enhance "gut health."

Option C:

1. Chlorella pyrenoidosa is a freshwater alga.
2. It's also known as seaweed.
3. It's utilized as both a food and a medication.

Option (D) :

1. Anabaena's cells resemble beads or barrels and can contain bigger spores.
2. There are both solitary and colony forms, with the latter resembling the closely related genus Nostoc.

Final answer: Trichoderma can be used as a biocontrol agent in the treatment of plant disease.