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Protein accumulation in aleurone cells, sub-aleurone cells and the center starch endosperm of cereals

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Abstract

There are mainly three endosperm storage tissues in the cereal endosperm: aleurone cells, sub-aleurone cells and the center starch endosperm. The protein accumulation is very different in the three endosperm storage tissues. The aleurone cells accumulate protein in aleurone granules. The sub-aleurone cells and the center starch endosperm accumulate protein in endoplasmic reticulum-derived protein bodies and vacuolar protein bodies. Proteins are deposited in different patterns within different endosperm storage tissues probably because of the special storage properties of these tissues. There are several special genes and other molecular factors to mediate the protein accumulation in these tissues. Different proteins have distinct functions in the protein body formation and the protein interactions determine protein body assembly. There are both cooperation and competition relationships between protein, starch and lipid in the cereal endosperm. This paper reviews the latest investigations on protein accumulation in aleurone cells, sub-aleurone cells and the center starch endosperm. Useful information will be supplied for future investigations on the cereal endosperm development.

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Abbreviations

AC:

Aleurone cells

AG:

Aleurone granule

BiP:

Luminal-binding protein

CL:

Constitution lipid

CP:

Constitution protein

CSE:

Center starch endosperm

DCC:

Dilute salt solution

Em:

Embryo

ERPB:

Endoplasmic reticulum-derived protein body

ESP:

Endosperm storage protein

ESR:

Embryo surrounding region

ETC:

Endosperm transfer cells

LB:

Lipid body

PB:

Protein body

PDI:

Protein disulfide isomerase

RPBF:

Prolamin-box binding factor

SAC:

Sub-aleurone cells

SE:

Starch endosperm

SG:

Starch granule

SGM:

Starch granule membrane

SL:

Storage lipid

SP:

Storage protein

SSE:

Starch synthesis enzyme

VPB:

Vacuolar protein body

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Acknowledgments

This work is supported by the National Natural Science Foundation of China Grant (no. 31270228, 31071341) to Prof. Yunjie Gu and Prof. Zhong Wang.

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The authors declare that they have no conflict of interest.

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Correspondence to Zhong Wang.

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Communicated by Neal Stewart.

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Zheng, Y., Wang, Z. Protein accumulation in aleurone cells, sub-aleurone cells and the center starch endosperm of cereals. Plant Cell Rep 33, 1607–1615 (2014). https://doi.org/10.1007/s00299-014-1651-2

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