Barley reveals new carb
Australian researchers have found a new complex carbohydrate in barley - the first of its kind to be discovered in over 30 years.
The newly-discovered cereal polysaccharide could have potential applications in food, medicine and cosmetics.
The discovery was made by research scientist Dr Alan Little and his team at the University of Adelaide.
“Plant cell walls contain components that are of major interest for many industries such as renewable sources for energy production, composite materials or food products,” says Dr Little.
“Knowledge of this new polysaccharide will open up further research to determine its role in the plant.
“We know that it can be found in the roots of barley suggesting it may play a role in plant growth or resistance to external stresses such as salinity or disease.
“By observing natural variation of the polysaccharide in different cereal crops we will aim to identify links to important agricultural traits,” he said.
The new polysaccharide is a mix of glucose, commonly found in cellulose, and xylose, which is found in dietary fibre.
Based on the relative proportions of each sugar, the hybrid polysaccharide has the potential to behave as a structural component of the wall providing strength or conversely as a viscous gel.
Further research is required to understand the new polysaccharide’s potential uses. Existing polysaccharides have a wide range of uses, including improve the quality of dietary fibre in porridge as well as extensive biomedical and cosmetic applications.
“The properties of the new polysaccharide could be manipulated to suit the desired function, increasing the range of potential uses,” says Dr Little.
“The genes involved in the biosynthesis of the new polysaccharide were also discovered as part of this work.
“The same genes can be found in all major cereal crops – not just barley.
“We can now use this knowledge to find ways of increasing these polysaccharides in crops, providing the possibility of generating plant material with a range of potentially different physical properties for industrial applications.”