Anti-herpes activity of polysaccharide fractions from leaves.

The antiviral potential of natural polysaccharide compounds has been demonstrated, especially against enveloped viruses and members of the family. Two polysaccharide fractions obtained from (Bertoni) leaves, that were active against Herpes simplex virus type 1 (HSV-1) were studied to investigate their mode of action. Both polysaccharides - SFW (crude faction) and SSFK (homogeneous alkaline fraction) - exerted antiviral effects on the initial stages of HSV-1 infection by inhibiting viral adsorption and penetration.

Biochemical composition of symplastic sap from sugarcane genetically modified to overproduce proline.

Global interest in sugarcane has increased significantly in recent years because of its economic impact on sustainable energy production. The purpose of the present study was to evaluate changes in the concentrations of total sugars, amino acids, free proline, and total proteins by colorimetric analyses and nuclear magnetic resonance (NMR) to perform a metabolic profiling of a water-soluble fraction of symplastic sap in response to the constitutive expression of a mutant Δ-pyrroline-5-carboxylate synthetase (P5CS) gene from Vigna aconitifolia. However, there was not a significant increase in the free proline content in the sap of transgenic plants compared to the non-transformed control plants.

A new natural source for obtainment of inulin and fructo-oligosaccharides from industrial waste of Stevia rebaudiana Bertoni.

Fructan-type inulin and fructo-oligosaccharides (FOS) are reserve polysaccharides that offer an interesting combination of nutritional and technological properties for food industry. Stevia rebaudiana is used commercially in the sweetener industry due to the high content of steviol glycosides in its leaves. With the proposal of using industrial waste, the objective of the present study was to isolate, characterize and evaluate the prebiotic activity of inulin and FOS from S.

Chemical characterization and prebiotic activity of fructo-oligosaccharides from Stevia rebaudiana (Bertoni) roots and in vitro adventitious root cultures.

Stevia rebaudiana (Bertoni) is widely studied because of its foliar steviol glycosides. Fructan-type polysaccharides were recently isolated from its roots. Fructans are reserve carbohydrates that have important positive health effects and technological applications in the food industry.