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Open AccessArticle

Starch Components, Starch Properties and Appearance Quality of Opaque Kernels from Rice Mutants

by Shun Zhang 1,2, Zheng Li 1,2, Lingshang Lin 1,2, Long Zhang 1,2 and Cunxu Wei 1,2,*
1
Key Laboratory of Crop Genetics and Physiology of Jiangsu Province/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Yangzhou University, Yangzhou 225009, China
2
Co-Innovation Center for Modern Production Technology of Grain Crops of Jiangsu Province/Joint International Research Laboratory of Agriculture & Agri-Product Safety of the Ministry of Education, Yangzhou University, Yangzhou 225009, China
*
Author to whom correspondence should be addressed.
Academic Editors: Adam Figiel and Anna Michalska
Molecules 2019, 24(24), 4580; https://doi.org/10.3390/molecules24244580
Received: 13 November 2019 / Revised: 8 December 2019 / Accepted: 11 December 2019 / Published: 13 December 2019
(This article belongs to the Special Issue Physicochemical Properties of Food)
Rice mutants with altered starch components and properties are important genetic resources in rice breeding programmes. In this study, 44 mutants with altered starch components were screened from 135 rice mutants with opaque kernels using a starch–iodine absorption spectrum method, and nine mutants from them were further selected for investigating their starch properties and kernel appearance quality. The results showed that the iodine absorption spectrum parameters, OD620, OD620/550, and λmax, could reflect the changes of starch components in rice mutants, and had significantly positive relationships with amylose content and negative relationships with the proportion of short branch-chains of amylopectin. The endosperm starches from nine mutants all showed A-type crystalline structure and similar short-range ordered structure, but had different relative crystallinities. The changes of starch components in mutants not only resulted in the different gelatinization properties of starch but also changed the appearance quality of brown rice kernels. This study provided abundant genetic plants for studying the molecular mechanism of starch synthesis and the quality regulation of rice kernels. View Full-Text
Keywords: rice mutant; starch component; physicochemical properties; appearance quality rice mutant; starch component; physicochemical properties; appearance quality
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MDPI and ACS Style

Zhang, S.; Li, Z.; Lin, L.; Zhang, L.; Wei, C. Starch Components, Starch Properties and Appearance Quality of Opaque Kernels from Rice Mutants. Molecules 2019, 24, 4580.

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