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Table 4 Effect of various concentrations of phenylalanine on the total caffeic acid derivatives and total hydrolysable sugars of Double Decker and Rubinstern calli after 3 months of cultivation

From: Active compounds and biological activity of in vitro cultures of some Echinacea purpurea varieties

Varieties

Phenylalanine conc. (mg/l)

Total caffeic acid derivative conc. (mg/g DW)

Total hydrolysable sugar conc. (mg/g DW)

Double Decker

0

0.57d

69.2b

50

4.62b

74.6b

100

8.20a

85.1a

150

0.78c

71.9b

LSD 0.05

 

0.19

7.05

Rubinstern

0

0.88d

73.4c

50

2.55b

95.8a

100

5.58a

66.3d

150

2.30c

82.1b

LSD 0.05

 

0.19

6.98

  1. Mean values with the same letter are not significant