Describe the economic importance of FUNGI AND BACTERIA

Fungi

  • some cause decay to our food
  • some cause diseases to humans and animals e.g. ringworms
  • may be used as food e.g. mushrooms, yeast
  • some are used in production of antibiotics e.g. penicillin, chloromycin, streptomycin
  • yeast is used in brewing industry, baking and source of vitamin B
  • many cause diseases to our crops e.g. late blight
  • important in recycling nutrients in soil since they cause decay of organic matter
  • mycorrhizal association in forest development may help in water intake/absorption
  • help in nitrogen fixation

BACTERIA

  • are useful in the manufacture of antibiotics
  • silage formation,
  • fermentation of cheese, butter, milk yoghurt
  • curing of tea, tobacco and retting flax
  • formation of vitamin B12 and K
  • enzymes such as amylase and invertase
  • hormones such as insulin
  • vinegar, acetic acid, lactic acid, citric acid
  • in septic tanks and modern sewage works make use of bacteria
  • biogas production
  • saprophytic bacteria are used in compost decomposition or cause decay
  • symbiotic bacteria are used in compost decomposition or cause decay
  • symbiotic bacteria in herbivores/ruminants help in digestion
  • some diseases in animals/humans and plants are caused by bacteria
  • many bacteria cause food spoilage/decay
  • nitrifying and nitrogen fixing bacteria increase soil fertility/make nitrates available
  • denitrifying bacteria reduce soil fertility/convert nitrates into nitrogen/reduce nitrates

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