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Thiobacillus denitrificans is involved in the process of converting nitrogen oxides in the soil into nitrogen gas, which can lead to a decline in soil fertility and agricultural output. What is the role of this microorganism?

1. Thiobacillus denitrificans facilitates the oxidation of thiosulfate and sulfur into sulfate.
2. Thiobacillus denitrificans aids in the conversion of ferrous ions into ferric ions.
3. Thiobacillus denitrificans can withstand high levels of various ions such as iron, copper, cobalt, nickel, and zinc.
4. Thiobacillus denitrificans participates in denitrification, transforming nitrogen oxides into atmospheric nitrogen.

Correct answer: Thiobacillus denitrificans participates in denitrification, transforming nitrogen oxides into atmospheric nitrogen.

Solution

Thiobacillus denitrificans is a denitrifying bacterium that converts nitrates and nitrites into free nitrogen gas (N2), a process known as denitrification, which can reduce soil fertility.

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