Related Experiment Videos
Arabinoxylans from rye and wheat seed that interact with ice
P K Kindel1, S Y Liao, M R Liske
1Department of Biochemistry, Michigan State University, East Lansing 48824.
Carbohydrate Research
|April 15, 1989
Summary
Rye and wheat seed extracts contain arabinoxylans that inhibit ice crystal growth. Rye arabinoxylans show superior ice-inhibiting activity compared to wheat varieties, suggesting potential applications in cryoprotection.
Area of Science:
- Plant Biochemistry
- Food Science
- Cryobiology
Background:
- Ice recrystallization inhibitors (IRIs) are crucial for cryopreservation and food texture.
- Polysaccharides from plant seeds are known sources of IRIs.
- Arabinoxylans are a major component of cereal seed cell walls.
Purpose of the Study:
- To purify and characterize arabinoxylans from rye and wheat seeds.
- To evaluate the ice recrystallization inhibition activity of these arabinoxylans.
- To compare the structural features and inhibitory efficacy of arabinoxylans from different cereal sources.
Main Methods:
- Purification of polysaccharides from rye and wheat seeds.
- Characterization of polysaccharide homogeneity, sugar composition, and molecular weight using chromatography.
- Assessment of ice crystal growth inhibition activity.
Main Results:
- Homogeneous arabinoxylans were isolated from rye, Genesee wheat, and Hillsdale wheat seeds.
- Structural analysis revealed a xylan backbone with terminal arabinose side-chains.
- Rye arabinoxylan exhibited higher ice recrystallization inhibition activity than Hillsdale wheat arabinoxylan.
- Molecular weights of active polysaccharides exceeded 2 x 10^6 Da, with rye being slightly larger.
Conclusions:
- Arabinoxylans from rye and wheat seeds possess significant ice recrystallization inhibition properties.
- Structural variations, particularly the xylose:arabinose ratio, influence inhibitory efficacy.
- Rye arabinoxylans demonstrate superior performance, indicating potential for cryoprotective applications.