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Updated: Oct 8, 2025
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Analysis and Specification of Starch Granule Size Distributions
Published on: March 4, 2021
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Relations between starch fine molecular structures with gelatinization property under different moisture content.
Enpeng Li1, Panpan Cao1, Wei Cao2
1Key Laboratory of Plant Functional Genomics of the Ministry of the Ministry of Education, Jiangsu Key Laboratory of Crop Genetics and Physiology, College of Agriculture, Yangzhou University, Yangzhou 225009, Jiangsu Province, China.
Carbohydrate Polymers
|January 2, 2022
Summary
Rice starch gelatinization temperature increases with lower moisture content. Amylose content shows a parabolic link to gelatinization, with specific starch chains influencing distinct thermal events.
Area of Science:
- Food Science
- Biochemistry
- Materials Science
Background:
- Starch gelatinization is crucial for food processing and is linked to starch structure.
- The combined effects of starch molecular structure and moisture content on gelatinization are not fully understood.
Purpose of the Study:
- To investigate how varying amylose content and moisture levels influence rice starch gelatinization.
- To elucidate the relationship between starch fine molecular structures and gelatinization parameters.
Main Methods:
- Examined gelatinization properties of six rice starches with diverse amylose content.
- Tested starches under various controlled moisture conditions.
Main Results:
- Increased starch gelatinization temperatures and appearance of biphasic endothermic peaks were observed as moisture content decreased.
- A novel parabolic relationship between amylose content and gelatinization temperatures was identified.
- Specific starch molecular components, including short amylose chains and amylopectin trans-lamellar chains, were linked to distinct gelatinization thermal events.
Conclusions:
- Moisture content significantly impacts rice starch gelatinization temperatures and thermal profiles.
- Starch fine molecular structures play distinct roles in the biphasic gelatinization process, particularly under limited moisture conditions.
- Findings enhance understanding of the complex interplay between starch structure, moisture, and gelatinization.
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