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- W3200886711 abstract "Hydrogen peroxide (H2O2) priming was proved to be effective to boost salt and drought stress tolerance in Capsicum annuum L. Hither, hydrotime (HT) approach, a population-based threshold model-germination dependence on water availability, was introduced to account for the effects of reduced water potential on H2O2-primed seeds in progress toward germination. Pre-optimized H2O2 concentrations (1 and 10 mM for 24 h at 25 °C) were applied. Subsequently, seeds were germinated over a range of water potential (Ψ) (0 to -1.2 MPa) induced by sodium chloride (NaCl) and polyethylene glycol (PEG-6000) at 25 °C. We suggest that H2O2-priming affects differently the three derived items of HT model; induced lower hydrotime constant (θH) thus, revealed more rapid germination particularly evident with PEG, shifted the threshold or base water potential for 50% germination (Ψb(50)) towards a more negative value in NaCl culture, reflected a better salinity tolerance, though, the opposite effect was recorded with PEG, and reduced the standard deviation (σΨb), proved a better uniformity of the germination process for both cultures. Thus, H2O2-priming increased GRg (1/tg) at all Ψ>Ψb(g) which is due to both a lower Ψb(50) and a smaller θH in the primed seeds for NaCl culture and primarily owing to reducing θH with no positive effect on Ψb(50) for PEG culture. A normalized time-scale, for comparing responses, was introduced and confirmed the aforementioned impact. Therefore, the crosstalk between H2O2 molecule and different cell pathways generates a constructive response in accordance with imposed stress." @default.
- W3200886711 created "2021-09-27" @default.
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- W3200886711 date "2021-10-01" @default.
- W3200886711 modified "2023-09-23" @default.
- W3200886711 title "Hydrotime analysis to explore the effect of H2O2−priming in the relationship between water potential (Ψ) and germination rate of Capsicum annuum L. seed under NaCl− and PEG−induced stress" @default.
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- W3200886711 doi "https://doi.org/10.1016/j.plaphy.2021.09.025" @default.
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