ArticleRice (New York, N.Y.)2021
Generation and Starch Characterization of Non-Transgenic BEI and BEIIb Double Mutant Rice (Oryza sativa) with Ultra-High Level of Resistant Starch.
Article in Rice (New York, N.Y.), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.
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26 citing papers in PubMed, 58 citations in OpenAlex.
- Molecular mechanisms underlying low glycemic index in rice: Insights from Indian landrace diversity.Molecular biology reports · 2026Review
- Multifaceted Effects of Starch Branching Enzyme and Soluble Starch Synthase Gene Editing in Rice with Different Wx Genotypes.Rice (New York, N.Y.) · 2026Article
- Moderate Regulation of SBEIIb Gene Expression by Editing Cis-Regulatory Elements Enhances the Resistant Starch Content in Rice.Plant biotechnology journal · 2026Article
- QTL mapping for different resistant starch subtypes identified a superior haplotype balancing high RS content and relatively good eating and cooking qualities in rice.Frontiers in plant science · 2026Article
- Starch branching enzyme: structure, key functional sites, and regulation of starch characteristics and rice qualities.Plant cell reports · 2025Review
- The miR395b-ABI5 module regulates amylopectin branching and biosynthesis and affects lotus root quality.Plant physiology · 2025Article
- Physiological and compensatory roles of three starch-branching enzymes in different rice organs.Plant molecular biology · 2025Article
- Creation of high-resistant starch rice through systematic editing of amylopectin biosynthetic genes in rs4.Plant biotechnology journal · 2025Article
- Functional nutritional rice: current progresses and future prospects.Frontiers in plant science · 2024Review
- Exploring the synergy of enzymes, nutrients, and gene networks in rice starch granule biogenesis.Frontiers in nutrition · 2024Article
- Triple gene mutations boost amylose and resistant starch content in rice: insights fromFrontiers in plant science · 2024Article
- Loss of function ofProceedings of the National Academy of Sciences of the United States of America · 2023Article
- Review
- Discrepancies in resistant starch and starch physicochemical properties between rice mutants similar in high amylose content.Frontiers in plant science · 2023Article
- Physicochemical properties and molecular mechanisms of different resistant starch subtypes in rice.Frontiers in plant science · 2023Article
- Screening of Induced Mutants Led to the Identification of Starch Biosynthetic Genes Associated with Improved Resistant Starch in Wheat.International journal of molecular sciences · 2022Article
- Effect of Heading Date on the Starch Structure and Grain Yield of Rice Lines with Low Gelatinization Temperature.International journal of molecular sciences · 2022Article
- Improving Agricultural Traits While Maintaining High Resistant Starch Content in Rice.Rice (New York, N.Y.) · 2022Article
- Resistant starch formation in rice: Genetic regulation and beyond.Plant communications · 2022Review
- Effects of Various Allelic Combinations of Starch Biosynthetic Genes on the Properties of Endosperm Starch in Rice.Rice (New York, N.Y.) · 2022Review
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
Abstract
backgroundCereals high in resistant starch (RS) are gaining popularity, as their intake is thought to help manage diabetes and prediabetes. Number of patients suffering from diabetes is also increasing in Asian countries where people consume rice as a staple food, hence generation of practically growable high RS rice line has been anticipated. It is known that suppression of starch branching enzyme (BE) IIb increases RS content in cereals. To further increase RS content and for more practical use, we generated a non-transgenic be1 be2b double mutant rice (Oryza sativa) line, which completely lacked both proteins, by crossing a be1 mutant with a be2b mutant.
resultsThe be1 be2b mutant showed a decrease in intermediate amylopectin chains and an increase in long amylopectin chains compared with be2b. The amylose content of be1 be2b mutant (51.7%) was the highest among all pre-existing non-transgenic rice lines. To understand the effects of chewing cooked rice and cooking rice flour on RS content, RS content of mashed and un-mashed cooked rice as well as raw and gelatinized rice flour were measured using be1 be2b and its parent mutant lines. The RS contents of mashed cooked rice and raw rice flour of be1 be2b mutant (28.4% and 35.1%, respectively) were 3-fold higher than those of be2b mutant. Gel-filtration analyses of starch treated with digestive enzymes showed that the RS in be1 be2b mutant was composed of the degradation products of amylose and long amylopectin chains. Seed weight of be1 be2b mutant was approximately 60% of the wild type and rather heavier than that of be2b mutant.
conclusionsThe endosperm starch in be1 be2b double mutant rice were enriched with long amylopectin chains. This led to a great increase in RS content in cooked rice grains and rice flour in be1 be2b compared with be2b single mutant. be1 be2b generated in this study must serve as a good material for an ultra-high RS rice cultivar.
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