ArticlePlant physiology2006
Function and characterization of starch synthase I using mutants in rice.
Article in Plant physiology, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 143 papers.
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143 citing papers in PubMed.
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- Comprehensive DIA-MS Proteomics of Root Basal Nodes Elucidates Mechanisms of Salt Tolerance in Rice.Proteomics · 2026Article
- Multifaceted Effects of Starch Branching Enzyme and Soluble Starch Synthase Gene Editing in Rice with Different Wx Genotypes.Rice (New York, N.Y.) · 2026Article
- QTL-Seq and pyramiding of yield-related loci from wild rice (Molecular breeding : new strategies in plant improvement · 2026Article
- Role of Starch Accumulation at the Mature Green Stage in Shaping Tomato Fruit Quality.Plants (Basel, Switzerland) · 2026Article
- Three transcription factors, OsNF-YC8, OsNF-YC9, and OsNF-YC10, function redundantly to promote amylopectin synthesis by activating SBE3 expression in rice endosperm.Plant communications · 2026Article
- Genetic Determinants and Breeding Strategies for Rice Cooking and Eating Quality: A Comprehensive Review.Plant biotechnology journal · 2026Review
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- Modification of starch synthesis in food crops using CRISPR/Cas9 gene editing technology for changing climate.Stress biology · 2026Review
- Rice Genotype Related to Starch Biosynthesis: Effects on Rice Starch Structure and Enzymatic Digestibility duringJournal of applied glycoscience · 2026Article
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- Physiological and compensatory roles of three starch-branching enzymes in different rice organs.Plant molecular biology · 2025Article
- In-Silico Identification, Characterization and Expression Analysis of Genes Involved in Resistant Starch Biosynthesis in Potato (Solanum tuberosum L.) Varieties.Molecular biotechnology · 2025Article
- Rice LIKE EARLY STARVATION1 cooperates with FLOURY ENDOSPERM6 to modulate starch biosynthesis and endosperm development.The Plant cell · 2024Article
- Starch phosphorylation regulates starch granule morphological homogeneity in Arabidopsis thaliana.Plant physiology · 2024Article
- QTL Detection and Candidate Gene Identification for Eating and Cooking Quality Traits in Rice (International journal of molecular sciences · 2024Article
- Exploring the synergy of enzymes, nutrients, and gene networks in rice starch granule biogenesis.Frontiers in nutrition · 2024Article
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- A model for the reproduction of amylopectin cluster by coordinated actions of starch branching enzyme isoforms.Plant molecular biology · 2023Review
- Effects of the Molecular Structure of Starch in Foods on Human Health.Foods (Basel, Switzerland) · 2023Review
83 more citing papers are in PubMed but not listed here.
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7 authors.
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Abstract
Four starch synthase I (SSI)-deficient rice (Oryza sativa) mutant lines were generated using retrotransposon Tos17 insertion. The mutants exhibited different levels of SSI activities and produced significantly lower amounts of SSI protein ranging from 0% to 20% of the wild type. The mutant endosperm amylopectin showed a decrease in chains with degree of polymerization (DP) 8 to 12 and an increase in chains with DP 6 to 7 and DP 16 to 19. The degree of change in amylopectin chain-length distribution was positively correlated with the extent of decrease in SSI activity in the mutants. The structural changes in the amylopectin increased the gelatinization temperature of endosperm starch. Chain-length analysis of amylopectin in the SSI band excised from native-polyacrylamide gel electrophoresis/SS activity staining gel showed that SSI preferentially synthesized DP 7 to 11 chains by elongating DP 4 to 7 short chains of glycogen or amylopectin. These results show that SSI distinctly generates DP 8 to 12 chains from short DP 6 to 7 chains emerging from the branch point in the A or B(1) chain of amylopectin. SSI seemingly functions from the very early through the late stage of endosperm development. Yet, the complete absence of SSI, despite being a major SS isozyme in the developing endosperm, had no effect on the size and shape of seeds and starch granules and the crystallinity of endosperm starch, suggesting that other SS enzymes are probably capable of partly compensating SSI function. In summary, this study strongly suggested that amylopectin chains are synthesized by the coordinated actions of SSI, SSIIa, and SSIIIa isoforms.
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