Fungal Reserve Materials

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Fungal Reserve Materials

Fungal Reserve Materials -

Some species of yeast (fungi) can store large amounts of fat and carbohydrates under certain growth conditions.

Glycogen is believed to be a reserve food material that accumulates in older cells.

It disappears when the cells are placed in a fresh growth medium.

It also accumulates in asci during sporulation. Fat globules of various sizes are distributed in the yeast cytoplasm.

These globules are prominent especially during sporulation and serve as food for ascospores.

When cultured in a medium rich in a carbon source and poor in nitrogen, yeast, such as Torula, can store lipids upto 20 per cent of its dry weight.

In addition to carbohydrates and fat, yeast cells also contain metachromatic granules.

The presence and size of these is dependent on the phosphate concentration in the growth medium

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