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. 2022 May 10;13:876198. doi: 10.3389/fgene.2022.876198

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Copyright © 2022 Parida, Sekhar, Panda, Sahu and Shaw.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Schematic presentation of starch synthesis from sucrose, the end product of photosynthesis, in the rice grain. Sucrose unloaded from the phloem enters the endosperm cells via the plasmodesmata or through the apoplast with the help of the sucrose transporter. The reactions leading to the synthesis of starch are described in the text. Suc, sucrose; SUS, sucrose synthase; UDP-G, uridine diphosphate glucose; UGPase, UDPG-pyrophosphorylase; AGPase, ADPG-pyrophosphorylase; sol SS, soluble starch synthase; GBSS, granule-bound starch synthase.