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
Copyright © 2021 Elsevier Masson SAS. All rights reserved.
| Veröffentlicht in: | Plant physiology and biochemistry : PPB. - 1991. - 167(2021) vom: 30. Okt., Seite 990-998 |
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| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2021
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| Zugriff auf das übergeordnete Werk: | Plant physiology and biochemistry : PPB |
| Schlagworte: | Journal Article Base water potential Capsicum Drought H(2)O(2)−priming Hydrotime analysis Salinity Water 059QF0KO0R Sodium Chloride mehr... |
| Zusammenfassung: | Copyright © 2021 Elsevier Masson SAS. All rights reserved. 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 |
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| Beschreibung: | Date Completed 13.10.2021 Date Revised 13.10.2021 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1873-2690 |
| DOI: | 10.1016/j.plaphy.2021.09.025 |