ArticleThe Plant cell2023
Initiation of B-type starch granules in wheat endosperm requires the plastidial α-glucan phosphorylase PHS1.
Article in The Plant cell, 2023. 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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Who cites it
26 citing papers in PubMed, 38 citations in OpenAlex.
- Protein Composition and Starch Structural Differentiation During Wheat Grain Filling Are Associated with Mature Grain Quality.Foods (Basel, Switzerland) · 2026Article
- Starch phosphorylase acts as a pivotal scaffold connecting starch metabolism enzymes with photosystem I subunits.Plant & cell physiology · 2026Article
- HvPHO1 Controls a Glucose 1-Phosphate-SnRK1 Signalling Module That Coordinates Starch Accumulation in Barley Endosperm.Plant biotechnology journal · 2026Article
- EPOS1 is required for normal pyrenoid starch sheath formation and efficiency of the COThe New phytologist · 2026Article
- Differential condensation of FLO6 influences grain amylose synthesis in rice.Science advances · 2026Article
- Rice PROTEIN L-ISOASPARTYL METHYLTRANSFERASES provides tolerance against sheath blight disease and repairs ALDH and PBZ1.Nature communications · 2026Article
- Transcriptional adapter ADA2 regulates yield and end-use quality through liquid-liquid phase separation in wheat.Journal of integrative plant biology · 2026Article
- Regulatory factors of starch metabolism in cereal endosperm.Plant molecular biology · 2026Review
- The plastidial PHS1-DPE1 complex drives efficient malto-oligosaccharides synthesis in rice starch metabolism.Nature communications · 2026Article
- Article
- Starch Synthase 3 isoforms are essential for normal starch granule initiation in wheat endosperm.The New phytologist · 2026Article
- Wandering starch - how plastid dynamics affect starch granule formation?The New phytologist · 2026Article
- Altered starch composition and improved bread quality in novel wheat mutant reveal key transcriptional regulators.Current research in food science · 2026Article
- Homoeolog expression in polyploid wheat mutants shows limited transcriptional compensation.The New phytologist · 2026Article
- Protein targeting to Starch 2 and the plastidial phosphorylase 1 revealed protein-protein interactions with photosynthesis proteins in yeast two-hybrid screenings.Plant signaling & behavior · 2025Article
- Tuning starch granule size distributions in durum wheat using genetic variation at a single locus.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2025Article
- Old player, new roles: defining the role of the plastidial phosphorylase.The New phytologist · 2025Review
- Plastidial starch phosphorylase regulates maltodextrin turnover during starch granule initiation in Arabidopsis leaves.Plant physiology · 2025Article
- The plastidial α-glucan phosphorylase modulates maltodextrin metabolism and affects starch parameters in Arabidopsis thaliana.Journal of experimental botany · 2025Article
- Challenges of translating Arabidopsis insights into crops.The Plant cell · 2025Review
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
Abstract
The plastidial α-glucan phosphorylase (PHS1) can elongate and degrade maltooligosaccharides (MOSs), but its exact physiological role in plants is poorly understood. Here, we discover a specialized role of PHS1 in establishing the unique bimodal characteristic of starch granules in wheat (Triticum spp.) endosperm. Wheat endosperm contains large A-type granules that initiate at early grain development and small B-type granules that initiate in later grain development. We demonstrate that PHS1 interacts with B-GRANULE CONTENT1 (BGC1), a carbohydrate-binding protein essential for normal B-type granule initiation. Mutants of tetraploid durum wheat (Triticum turgidum) deficient in all homoeologs of PHS1 had normal A-type granules but fewer and larger B-type granules. Grain size and starch content were not affected by the mutations. Further, by assessing granule numbers during grain development in the phs1 mutant and using a double mutant defective in both PHS1 and BGC1, we demonstrate that PHS1 is exclusively involved in B-type granule initiation. The total starch content and number of starch granules per chloroplast in leaves were not affected by loss of PHS1, suggesting that its role in granule initiation in wheat is limited to the endosperm. We therefore propose that the initiation of A- and B-type granules occurs via distinct biochemical mechanisms, where PHS1 plays an exclusive role in B-type granule initiation.
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