This study was conducted to determine the content of carbohydrates and Mucilage in roots and leaflets of different Astragalus species for the first time from Iran. The content of reducing sugars, oligosaccharides and polysaccharides in roots of the species were determined spectrophotometrically. The content and sugar composition of the mucilages in leaflets was determined by gravimetry and gas-liquid chromatography, respectively. According to the results of this research, the content of sugars in roots and mucilage in leaflets depends on the factors Such as the species and geographical location of the plants. Reducing sugars, oligosaccharides and polysaccharides content in roots of the species varied from 0.11-0.90, 2.21-7.27 and 1.3-7.33 dry weight, respectively. The mucilage content in leaflets of different species varied from 5.32 to 19.24 dry weight.
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