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Liquid Culture Systems for in vitro Plant Propagation

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Somatic embryogenesis of Gentiana 349<br />

Table 1: Percentage of aggregate fractions <strong>in</strong> 3-year-old cell suspension of G. cruciata and<br />

G. tibetica (<strong>in</strong> 1.0 ml of suspension, after 5 days of subculture)<br />

Aggregate fraction (�m) G. cruciata G. tibetica<br />

70 –120 54 ± 0.59 36± 0.70<br />

120-240 29 ± 0.54 30 ± 0.67<br />

240-450 11 ± 0.37 14 ± 0.51<br />

450-500 6 ± 0.27 17 ± 0.55<br />

>500 0.6 ± 0.09 3 ± 0.24<br />

Table 2: Ratio (R) of coefficient of fresh (FM) and dry (DM) mass of cell suspensions<br />

cultured <strong>in</strong> MS supplemented with Dic + NAA + BAP + AS<br />

Age of<br />

culture<br />

Gentiana cruciata Gentiana tibetica<br />

FM* DM* R FM* DM* R<br />

1-year-old 4.0 3.1 0.78 3.8 3.2 0.84<br />

2-year-old 4.1 3.4 0.83 3.4 3.8 1.12<br />

3-year-old 2.2 2.0 0.91 1.4 2.6 1.86<br />

* ratio of f<strong>in</strong>al to <strong>in</strong>itial cell mass<br />

Table 3: 2C value describe by cytometic DNA (pg) content <strong>in</strong> control plant, 3-year-old PEM<br />

and regenerants of G. cruciata and G. tibetica. Mitotic activity of PEM - the ratio of cells <strong>in</strong><br />

phase G 2 to phase G 1 (<strong>in</strong> bold)<br />

Species Control plants PEM Regenerants<br />

G. cruciata 2.45 ± 0.13<br />

G. tibetica 2.51 ± 0.036<br />

1.5 ± 0.03<br />

(6%)<br />

1.15 ± 0.35<br />

(18 %)<br />

2.77 ± 0.65<br />

2.74 ± 0.68

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