151
          
        
        
          
            Penicillin
          
        
        
          In 1928, Sir Alexander
        
        
          Fleming made an important
        
        
          discovery. He realised
        
        
          that the mould
        
        
          
            Penicillium
          
        
        
          
            notatum
          
        
        
          makes a chemical
        
        
          that kills bacteria. That
        
        
          chemical, called penicillin, is
        
        
          used today as a medicine to
        
        
          treat many illnesses.
        
        
          A mushroom under the Malheur National Forest, USA, covers 8.9 square kilometres.
        
        
          
            Fungi
          
        
        
          
            Wine:
          
        
        
          Yeast turns grape
        
        
          juice into wine by changing
        
        
          sugar into alcohol.
        
        
          
            Cheese:
          
        
        
          Blue cheeses are
        
        
          made with a mould called
        
        
          
            Penicillium roquefortii
          
        
        
          .
        
        
          
            Soy sauce:
          
        
        
          This is made by
        
        
          adding fungi and yeast to
        
        
          soy beans and roasted wheat.
        
        
          
            Medicine:
          
        
        
          Fungi can be
        
        
          used to cure many diseases
        
        
          that were once fatal.
        
        
          
            Uses of fungi
          
        
        
          Fungi have many uses in
        
        
          the home and in industry.
        
        
          
            Pesticide:
          
        
        
          Fungi can be an
        
        
          environmentally friendly
        
        
          way of killing insects or
        
        
          weeds.
        
        
          
            Yeast
          
        
        
          Yeast are microscopic,
        
        
          single-celled fungi. When
        
        
          they feed, they turn sugar
        
        
          into carbon-dioxide gas
        
        
          and alcohol. Yeast plays
        
        
          an important part in
        
        
          bread-making. As it releases
        
        
          gas, it makes bread rise.
        
        
          Penicillin on
        
        
          a petri dish
        
        
          
            Shaggy parasol
          
        
        
          
            mushroom
          
        
        
          
            Shaggy cap
          
        
        
          
            mushroom
          
        
        
          
            Common
          
        
        
          
            chantarelle
          
        
        
          
            mushroom
          
        
        
          
            Chicken of the
          
        
        
          
            woods fungus
          
        
        
          The bacteria
        
        
          have retreated
        
        
          from the
        
        
          penicillin,
        
        
          leaving a
        
        
          clear ring.
        
        
          
            Truffles
          
        
        
          Truffles are strong-
        
        
          smelling fungi that grow
        
        
          underground. They are a
        
        
          delicacy used in cookery.
        
        
          Truffle hunters use pigs
        
        
          and dogs to sniff them out.
        
        
          
            Sir Alexander Fleming (1881–1955)
          
        
        
          White truffle
        
        
          Black
        
        
          perigord
        
        
          truffle