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Liquid Culture Systems for in vitro Plant Propagation

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52 Anne Kathr<strong>in</strong>e Hvoslef-Eide et al.<br />

g/l<br />

pcv %<br />

70<br />

60<br />

50<br />

40<br />

30<br />

20<br />

10<br />

12<br />

10<br />

8<br />

6<br />

4<br />

2<br />

0<br />

0<br />

Fresh weight<br />

1 3 6 8 10 13<br />

Days<br />

Packed cell volume (pcv)<br />

1 3 6 8 10 13<br />

Days<br />

g/l<br />

cluster viability %<br />

4<br />

3,5<br />

3<br />

2,5<br />

2<br />

1,5<br />

1<br />

0,5<br />

0<br />

80<br />

70<br />

60<br />

50<br />

40<br />

30<br />

20<br />

10<br />

0<br />

Dry weight of cells<br />

1 3 6 8 10 13<br />

Days<br />

Cluster viability<br />

1 3 6 8 10 13<br />

Days<br />

Figure 4: The difference between identical suspension cultures of Cyclamen persicum Mill.<br />

<strong>in</strong> bioreactors (open diamonds) and Erlenmeyer flasks (closed squares) on fresh and dry<br />

weight, packed cell volume and cluster viability dur<strong>in</strong>g a two-week period, show<strong>in</strong>g standard<br />

deviations <strong>for</strong> each measurement.<br />

4.2 General discussion<br />

Our system is <strong>for</strong> batch-culture, where medium is changed once each<br />

week as the cultures are diluted and cells are harvested. Such a system is not<br />

considered to be optimal with regards to maximum cell growth <strong>in</strong> such a<br />

short period of time. A cont<strong>in</strong>uous mode of operation, with a cont<strong>in</strong>uous

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