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Endosperm starch in rice: what influences its structure, properties, and biosynthesis

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Abstract

Rice grain starch is an essential component of grain quality and includes four aspects: grain appearance, milling quality, nutritional quality, and cooking and eating quality. These quality attributes are influenced and modulated by several key components during the starch development process. These include enzymes, genes, and environmental factors that cause changes in starch properties and generally influence all characteristics that lead to the development of starch with essential quality attributes. The process of starch development can be divided into the phases of initiation and primer modification (chain elongation, initiation of new branches, and disentanglement of chains). Much progress has been made in understanding starch development processes and the genetic networks that influence grain quality. In this review, we describe the structure of starch, its physiochemical properties, the process of starch biosynthesis, environmental stresses, and hormones at both the synthesis and regulation levels. Understanding the process of starch biosynthesis in rice endosperm is important for modifying seed quality and promoting starch utilization efficiency.

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Modified from Satoh et al. (2008). FX and YFW designed the research and corrected the manuscript; YFW and EOA wrote the manuscript. All the authors have read and approved the manuscript

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Abbreviations

ABA:

Abscisic acid

ADP-Glc:

Adenosine diphosphate glucose

ATP:

Adenosine triphosphate

AGPase:

ADP-glucose pyrophosphorylase

AC:

Amylose content

AAC:

Apparent amylose content

IAA:

Auxin

BR:

Brassinosteroid

BDV:

Breakdown viscosity

CO2 :

Carbon dioxide

CLD:

Chain length distribution

Tc:

Conclusion gelatinization temperature

CPV:

Cool paste viscosity

CK:

Cytokinin

DAF:

Days after fertilization

DAP:

Days after pollination

DPA:

Days post-anthesis

DP:

Degree of polymerization

DPE:

Disproportionating enzyme

ΔH:

Enthalpy of gelatinization

ETH:

Ethylene

Fru:

Fructose

Fruc-6-P:

Fructose-6-phosphate

GA:

Gibberellic acid

Glc-1-P:

Glucose-1-phospate

Glc-6-P:

Glucose-6-phosphate

GBSS:

Granule-bound starch synthase

HT:

High temperature

HPV:

Hot paste viscosity

MOS:

Malto-oligosaccharides

To:

Onset gelatinization temperature

PaT:

Pasting temperature

Tp:

Peak gelatinization temperature

PKV:

Peak viscosity

SBV:

Setback viscosity

SS:

Soluble starch synthase

SBE:

Starch branching enzyme

SDE:

Starch debranching enzyme

PHO:

Starch phosphorylase

TRV:

Trough viscosity

UDP-Glc:

Uridine diphosphate glucose

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Acknowledgements

This study was supported by the Natural Science Foundation of China (31801310), the Natural Science Foundation of Jiangsu Province (Grant BK20190889), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (Grant No. 19KJB180033), the Project funded by China Postdoctoral Science Foundation (2019M660130), “Lvyang Jinfeng” talents attracting plan, the Talent Support Program of Yangzhou University, and Yangzhou University Postdoctoral Science Foundation, a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD). And the authors apologize to colleagues whose research was unable to be discussed fully due to length limitations.

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Correspondence to Yunfei Wu.

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Communicated by J. Huang.

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Ansah, E.O., Chen, G., Xiong, F. et al. Endosperm starch in rice: what influences its structure, properties, and biosynthesis. Acta Physiol Plant 45, 121 (2023). https://doi.org/10.1007/s11738-023-03599-4

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  • DOI: https://doi.org/10.1007/s11738-023-03599-4

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