Abstract
The effects of waterlogging on amyloplasts and programmed cell death (PCD) in endosperm cells in Chinese wheat (Triticum aestivum L.; cv: Hua mai 8) are here discussed. Four water treatments were established from anthesis to maturity: they were 3 days of waterlogging treatment (DWT), 7 DWT, 12 DWT, and moderate water supply (the control). Lugol staining and scanning electron microscopy showed decreases in the number of amyloplasts and partially filled circular cavities under the waterlogging treatments. These resulted in serious deformities in the endosperm cells. Evans blue staining analysis and terminal deoxynucleotidyl transferase-mediated fluorescein deoxyuridine triphosphate nick-end labeling assays indicated that the PCD progression of endosperm cells occurred earlier under waterlogging treatments than in the control, so did the internucleosomal DNA fragmentation, which accompanies PCD in endosperm cells. Electron transmission microscopy analysis showed similar results. Under waterlogging treatments, the following PCD characteristics appeared earlier and were more pronounced than in normal endosperm cells: chromatin condensation, degradation of the nuclear envelope, swelling, and degradation of the mitochondrial cristae. Our study concluded that under waterlogging conditions, the number of amyloplasts tended to decrease and PCD was likely to appear ahead of time.
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Abbreviations
- DPA:
-
Days post anthesis
- DWT:
-
Days waterlogging treatment
- PCD:
-
Programmed cell death
- TUNEL:
-
Terminal deoxynucleotidyl transferase-mediated fluorescein deoxyuridine triphosphate nick-end labeling
- ABA:
-
Abscisic acid
- WT:
-
Waterlogging treatment
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This work is supported by the National Natural Science Foundation of China (grant nos. 31071347 and 31171469).
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Fan, HY., Zhou, ZQ., Yang, CN. et al. Effects of waterlogging on amyloplasts and programmed cell death in endosperm cells of Triticum aestivum L.. Protoplasma 250, 1091–1103 (2013). https://doi.org/10.1007/s00709-013-0485-z
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DOI: https://doi.org/10.1007/s00709-013-0485-z