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Q.
For retting of jute the fermenting microbe used is
ManipalManipal 2012
Solution:
Retting is a controlled microbial decomposition of pectin without simultaneous decomposition of fibres. Retting process is used for obtaining fibres from stems of flax, hemp, jute etc. For this purpose, stems of fibre yielding plants are immersed in water for long period where decomposition sets in. Retting is facilitated by anaerobic butyric acid bacteria such as Clostridium botulinum, Clostridium tetani and Clostridium perfringens. These bacteria primarily decompose the plant pectin thus, freeing the fibres. If process of retting continues for a long time then cellulose fermenting bacteria develop and destroy the fibres.