Claim · model-written summary
In imbibed and hydrated rye and wild oat embryos, neither the extent of water uptake, the stability of the DNA to desiccation, nor the onset of S-phase DNA synthesis determines whether the desiccated embryo survives.
- Taxon
- rye ( Secale cereale ) and wild oat ( Avena fatua )
Avena fatua
Secale cerealee1 - Outcome
- whether the desiccated embryo will survivee0
- Qualifier
- extent of water uptake by the cellse0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it is neither the extent of water uptake by the cells, the ensuing stability of the DNA to desiccation, nor the onset of S-phase DNA synthesis in the first cell cycle of germination that determines whether the desiccated embryo will survive”
e1“rye ( Secale cereale ) and wild oat ( Avena fatua )”
Title
The requirement for DNA repair in desiccation tolerance of germinating embryos
Ivan Boubriak; Haroula Kargiolaki; Linden Lyne; et al. Seed Science Research 1997. doi:10.1017/s0960258500003433
Other claims from this paper (5)
- Mechanism The authors propose that desiccation tolerance of the seed embryo depends on its capacity to repair damage to genomic DNA when rehydrated.
- Intervention effect When DNA repair polymerases alpha and beta are inhibited by aphidicolin and dideoxythymidine triphosphate, gamma-irradiation-induced DNA fragmentation cannot be fully repaired.
- Observation In hydrated embryos at a stage when desiccation tolerance is lost, embryo cells still repair irradiation-induced DNA damage.
- Observation In hydrated embryos at the stage when desiccation tolerance is lost, the repaired DNA is unstable to desiccation and cannot be rerepaired when water is again made available.
- Mechanism The failure to re-repair DNA on rehydration appears to be critical to embryo survival and successful germination.