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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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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DOI: https://doi.org/10.1007/s00299-014-1651-2