Abstract
Metasequoia glyptostroboides is an endangered relict plant native to China that has been widely introduced into many countries and areas around the world. However, its seeds germinate at a very low percentage. Consequently, population regeneration by seed is low under natural conditions, which probably contributes to the endangered status of this plant species. The present study aimed to describe the aging mechanism of M. glyptostroboides seeds. Our objective was to elucidate causes of the low germination rate in an effort to enhance potential for conservation of the species. We used germination tests, relative electrical conductivity and malondialdehyde content determination, ultrastructural observation of embryo cells, and analysis of superoxide dismutase, catalase, ascorbate peroxidase, and dehydroascorbate reductase activities during accelerated aging treatment. We found that M. glyptostroboides seeds have a low level of vigor and poor ability to maintain vigor, which is probably associated with the inefficiency of its enzymatic antioxidative system.
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Abbreviations
- ANOVA:
-
Analysis of variance
- APX:
-
Ascorbate peroxidase
- AsA:
-
Ascorbate peroxidase
- CAT:
-
Catalase
- CM:
-
Cytoplasmic membrane
- CW:
-
Cell wall
- DC:
-
Druse crystal
- DHA:
-
Dehydroascorbate
- DHAR:
-
Dehydroascorbate reductase
- DW:
-
Dry weight
- G:
-
Glyoxysome
- GCC:
-
Globoid crystal cavity
- GR:
-
Glutathione reductase
- GSH:
-
Glutathione
- GSSG:
-
Oxidized glutathione
- H2O2 :
-
Hydrogen peroxide
- IS:
-
Intercellular space
- ISTA:
-
International rules for seed testing
- LB:
-
Lipid body
- MDA:
-
Malondialdehyde
- MDHAR:
-
Monodehydroascorbate reductase
- Mt:
-
Mitochondrion
- N:
-
Nucleus
- \({\text{O}}_{ 2}^{ - }\) :
-
Superoxide radicals
- ·OH:
-
Hydroxy radicals
- 1O2 :
-
Singlet oxygen
- P:
-
Probability
- PB:
-
Protein body
- PPFD:
-
Photosynthetic Photon Flux Density
- RH:
-
Relative humidity
- ROS:
-
Reactive oxygen species
- S:
-
Starch granule
- SE:
-
Standard error
- SG:
-
Soft globoid
- S–N–K:
-
Student–Newman–Keuls
- SOD:
-
Superoxide dismutase
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Acknowledgements
This work was supported by the Research Project of Hubei Provincial Department of Education (Q20141902). We thank LetPub (www.letpub.com) for providing linguistic assistance during the preparation of this manuscript.
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The authors declare that they have no conflict of interest. Huan Liu and Yanfang Zhu contributed equally to this work.
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Project funding: This work was supported by the Research Project of Hubei Provincial Department of Education (Q20141902).
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Corresponding editor: Zhu Hong.
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Liu, H., Zhu, Y., Liu, X. et al. Effect of artificially accelerated aging on the vigor of Metasequoia glyptostroboides seeds. J. For. Res. 31, 769–779 (2020). https://doi.org/10.1007/s11676-018-0840-1
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DOI: https://doi.org/10.1007/s11676-018-0840-1