Abstract
Silicolytic bacteria are widely distributed playing significant role in silicon cycle. They convert silica into free silicic acid which is taken up by various life forms. Silicases catalyze dissolution of silica into silicic acid. Herein, diversity of silicolytic bacteria in different types of soil samples and wild grasses was studied by plate assay using different media. Silicase activity of two isolates from two different habitats was compared. The results revealed that silicolytic bacteria were abundant in number but their population varied in different habitats. Paddy field soil and wild grasses harbored the highest population of silicolytic bacteria. Different screening media were evaluated. Pigment and exo-polysachharide were also produced by some silicolytic endophytes. Statistical analysis showed that silicolytic bacterial population in paddy soil and wild grasses was significantly abundant as compared to that in dumping land and contaminated soil around heavy metal industries.
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