Can you provide an example of bacteria that converts nitrites into nitrates?
Nitrobacter is a key genus of bacteria that oxidizes nitrites (NO₂⁻) into nitrates (NO₃⁻) through a process called nitrification. These chemolithotrophic bacteria obtain energy by oxidizing nitrites and play a critical role in the second step of the nitrification process. The complete nitrification process involves two stages: first, Nitrosomonas bacteria convert ammonia (NH₃) to nitrites, then Nitrobacter completes the transformation by converting nitrites to nitrates. Nitrates are the primary nitrogen form that most plants absorb and use for growth. This bacterial conversion is essential in soil ecosystems, wastewater treatment plants, and aquariums, where maintaining proper nitrogen cycling prevents toxic ammonia and nitrite accumulation.
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