Strategies for nutrient uptake and storage

Often fungi take up all nutrients they get hold of irrespective of their needs. Fungi growing on different media with different mineral nutrient concentrations still show the same depletion of carbon although the need for carbon for growth is greater the higher the mineral nutrient concentration (Fig 15 A). Similarly growing on different carbon concentrations the uptake of phosphorous is the same (Fig 15B). Thus fungi are able to store both carbon and phosphorus intracellularly and the ratio between elements in a fungus will reflect the ratio of available elements in contact with the mycelium.

Fig 15. Glucose concentration profile under a fungal colonies grown on media with different mineral concentrations (A). Phosphorus concentration under fungal colonies grown on media with different glucose concentrations (B). Medium 3&6 is 2 times more concentrated than 2&5 that is 2 times more concentrated than 1&4.

  • 5-------------—,-.-I-.-,-.-.. ------
  • 5-4-3-3-1 0 ï Z 3 + S
  • 5-------------—,-.-I-.-,-.-.. ------
  • 5-4-3-3-1 0 ï Z 3 + S

cm fratri the ccntrc af the cûlanies

B 12

cm fratri the ccntrc af the cûlanies

B 12

■5 -4 -3 -Z -1 Û 1 2 3 A 5 cm frsm the centre of the colonies
0 0

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