Question

Write the names of microbes found in following food material

idli
dosa
yoghurt
bread
root nodules of leguminous
spoiled potato curry​

Answer 1

dosa-Lactobacillus fermentum

yoghurt-Lactobacillus delbrueckii

bread-yeast

root nodules of leguminous-rhizobium

spoiled potato curry : Staphylococcus aureus and Bacillus subtilis

Answer 2

Explanation:

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1. IDLI...

During idli batter fermentation, the predominant microfloras present are Leuconostoc mesenteroides, Streptococcus faecalis, Pediococcus cerevisiae which are responsible for leavening and acidification (Mukherjee et al., 1965). The fermentation of idli batter occurs due to the presence of certain microorganism viz.

2. DOSA....

Leuconostoc mesenteroides, Streptococcus faecalis, Lactobacillus fermentum and Bacillus amyloliquefaciens were the predominant bacteria responsible for souring and leavening of dosa batter. Yeasts whenever present, belonged mainly to Saccharomyces cerevisiae, Debaryomyces hansenii and Trichosporon beigelli.

3. YOGHURT....

bulgaricus to produce lactic acid, which acts on milk protein to give yoghurt its texture and its characteristic acidic taste. Other bacteria found in yoghurt are Lactobacillus acidophilus or casei, Streptococcus salivarius subsp. thermophilus and Bifidobacterium bifidus.

4. BREAD....

Yeast (Saccharomyces cerevisiae) contributes both to the texture and flavour of bread. A dough is made by mixing yeast with flour, salt and water. The yeast ferments sugars in the mixture to make alcohol and bubbles of carbon dioxide.

5. POTATO CURRY....

According to the question,microbes present in the following food materials are : Yoghurt: Lactobacillus bulgaricus and Streptococcus thermophilus. Bread: Yeast. Spoiled potato curry : mainly different kind of fungus.

6. NODULES OF LEGUMINOUS

They contain symbiotic bacteria called rhizobia within the nodules, producing nitrogen compounds that help the plant to grow and compete with other plants.

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