Table 7.
Yield of raw water soluble polysaccharide (RWSP) of D. palmatum herb under different temperatures of cultivation, their general characteristics and monosaccharide compositions.
| Parameter | Temperature (°C) | |
|---|---|---|
| 20 | 1 | |
| RWSP yield (%) a | 2.29 ± 0.04 c | 9.86 ± 0.20 c |
| RWSP general characteristics | ||
| Protein content, % b | 2.61 ± 0.07 c | 2.75 ± 0.09 c |
| Uronic acids, % b | 43.57 ± 1.01 c | 46.16 ± 1.14 c |
| Reaction with I2 (starch) | positive | positive |
| Reaction with resorcinol (inulin) | negative | negative |
| Reaction with Yariv’s reagent (AGP-complexes) | positive | positive |
| Reaction with Fehling’s reagent (mannans) | negative | negative |
| RWSP monosaccharide composition (mol %) | ||
| Ara | 10.1 | 10.2 |
| Gal | 26.1 | 27.7 |
| Glc | 14.4 | 10.2 |
| Fuc | 0.1 | 0.1 |
| Man | 4.3 | 4.0 |
| Rha | 1.9 | 1.7 |
| Rib | Tr. d | Tr. d |
| Xyl | Tr. d | Tr. d |
| GalA | 41.2 | 44.6 |
| GlcA | 1.8 | 1.4 |
a Percentage of dry plant weight ± SD; b Percentage of dry RWSP weight ± SD; c Averages ± standard deviations were obtained from three different experiments; d Tr., traces (<0.1 mol %).