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Liquid Culture Systems for in vitro Plant Propagation

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Nutrition of plants <strong>in</strong> greenhouses and <strong>in</strong> <strong>vitro</strong> 485<br />

Table 6: The effect of alternative RS-media compared with M. et al. (1972) medium on<br />

biomass yield, number of plants and survival after root<strong>in</strong>g <strong>in</strong> Sa<strong>in</strong>tpaulia ionantha (from<br />

Ayeh, 1998)<br />

At transplant<strong>in</strong>g (per jar)<br />

Media Biomass (g) No. of plants Survival after root<strong>in</strong>g (%)<br />

M. et al. (1972) 11.2 b 42.0 b 50.4 b<br />

RS-1997-1 14.4 ab 49.9 ab 87.5 a<br />

RS-1997-3 15.0 a 62.1 a 89.9 a<br />

*<br />

Different letters represent statistical differences at 5% level analysed by SAS Statistical<br />

package (ANOVA).<br />

Table 7: The effect of alternative RS-media compared with M. et al. (1972) medium on<br />

number of days from pott<strong>in</strong>g to first visible bud, the first open flower and plant on size <strong>in</strong><br />

Sa<strong>in</strong>tpaulia ionantha (from Ayeh, 1998)<br />

Media<br />

First visible<br />

bud (days)<br />

First open<br />

flower (days)<br />

Size (cm 2 )<br />

s<strong>in</strong>gle leaf whole plant<br />

M. et al. (1972) 104.2 b 112.2 b 17.4 c 161.1 c<br />

RS-1997-1 85.2 ab 93.4 ab 20.5 b 198.2 b<br />

RS-1997-3 71.6 a 80.0 a 24.5 a 245.5 a<br />

*<br />

Different letters represent statistical differences at 5% level analysed by SAS Statistical<br />

package (ANOVA).<br />

subcultur<strong>in</strong>g periods. Ayeh and Hvoslef-Eide tested these <strong>for</strong> Sa<strong>in</strong>tpaulia,<br />

Begonia and Gypsophila at NLH (Ayeh, 1998). The results from<br />

Sa<strong>in</strong>tpaulia are presented here (tables 6 and 7).<br />

Sa<strong>in</strong>tpaulia ionantha was propagated on these three media from table 5<br />

and compared <strong>for</strong> multiplication rate, survival rate at transfer, days-toflower<strong>in</strong>g<br />

and plant size and quality. The experiments were repeated six<br />

times. Table 6 shows that the best medium (RS-1997-3) <strong>for</strong> Sa<strong>in</strong>tpaulia gave<br />

greater biomass per jar, greater number of plants, as well as greater survival<br />

rate when transferred to greenhouse conditions. The most dramatic effect of<br />

this medium was flower<strong>in</strong>g 32 days earlier (Table 7), than <strong>in</strong> the medium<br />

proposed by Murashige et al. (1972). The plants also produced a greater<br />

number of flowers <strong>in</strong> the best nutrient medium (Table 8). Leifert and his coworkers<br />

have also demonstrated that the PO4 3- concentration of MS medium

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