Which of the following is not a cyanobacteria ?

Glomus

The correct answer is Option (2) - Glomus

Cyanobacteria, also known as blue-green algae, are autotrophic microorganisms found in various aquatic and terrestrial environments. Many species of cyanobacteria, including Anabaena, Nostoc, Oscillatoria, and more, have the ability to fix atmospheric nitrogen. In agricultural contexts like paddy fields, cyanobacteria play a significant role as essential biofertilizers. These blue-green algae contribute to soil fertility by adding organic matter.

In our country, a wide range of commercial biofertilizers is readily available in the market. Farmers regularly use these biofertilizers in their fields. This practice serves multiple purposes, including replenishing soil nutrients and reducing the reliance on chemical fertilizers.

Fungi are also known to form symbiotic associations with plants (mycorrhiza). Many members of the genus Glomus form mycorrhiza.