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. 2022 Jun 27;189(3):1196-1198.
doi: 10.1093/plphys/kiac187.

Sugar transport from sheaths to seeds: A role for the kinase SnRK1

Marieke Dubois  1   2
Affiliations

Sugar transport from sheaths to seeds: A role for the kinase SnRK1

Marieke Dubois. Plant Physiol. .
No abstract available

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Figures

Figure 1
Figure 1
Schematic representation of the role of SnRK1 in carbohydrate remobilization in Nipponbare rice sheaths. During vegetative growth and up to 10 days following anthesis, leaves and sheaths accumulate carbohydrates via photosynthesis. Excess carbon is stored as large starch granules in rice sheaths. During grain filling, nonstructural carbohydrates from the sheaths are remobilized to the panicles in a SnRK1-dependent manner. SnRK1a gene expression is induced, SnRK1a proteins accumulate, and their catalytic domain is phosphorylated for activation. Levels of the SnRK1-inhibiting compound T6P decrease. Finally, the main sucrose transporter in sheaths, Oryza sativa SUCROSE TRANSPORTER1 (OsSUT1), is transcriptionally activated. S, starch; C, chloroplast; G, glucose; SUC, sucrose. Arrows on the plants represent the carbon flow.
See this image and copyright information in PMC

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MeSH terms