Calcium uptake and transport in rice during grain filling under different water regimes : Novel insights from Ca isotope fractionation
Copyright © 2025. Published by Elsevier Masson SAS.
| Veröffentlicht in: | Plant physiology and biochemistry : PPB. - 1991. - 229(2025), Pt A vom: 18. Aug., Seite 110406 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2025
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| Zugriff auf das übergeordnete Werk: | Plant physiology and biochemistry : PPB |
| Schlagworte: | Journal Article Ca Fe plaque Grain filling Isotope fractionation Rice plant Water regime |
| Zusammenfassung: | Copyright © 2025. Published by Elsevier Masson SAS. Calcium (Ca) enrichment in rice grain is crucial for ensuring grain yield and quality. Thus, it is vital to understand the transport pathways of Ca from the soil to grain. In the present study, Ca isotope ratios were determined using pot experiments to elucidate the pathways of Ca transportation from soil to rice grains during grain filling. The Ca isotopes in the rice plants were lighter than those in the soil (Δ44/40Carice plant-soil = -0.42 ‰ to -0.23 ‰). They exhibited negative fractionation from the roots to the stems (Δ44/40Castems-roots = -0.29 ‰ to -0.71 ‰) and the stems to nodes I (Δ44/40Canodes I-stems = -0.11 ‰ to -0.64 ‰). While positive isotopic fractionation was observed from nodes I to the husks and grains (Δ44/40Cahusks-nodes I = 0.29 ‰ to 0.62 ‰; Δ44/40Cagrains-nodes I = 0.16 ‰ to 0.21 ‰). This study revealed that Fe plaques potentially serve as the primary source of Ca in rice plants. During grain filling, more light Ca isotopes enriched in the aboveground part, particularly upon drainage, while minimal changes in the roots. Our findings indicate that drainage promotes light Ca transportation as well as grain yield, providing a potential avenue for enhancing rice cultivating |
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| Beschreibung: | Date Revised 22.08.2025 published: Print-Electronic Citation Status Publisher |
| ISSN: | 1873-2690 |
| DOI: | 10.1016/j.plaphy.2025.110406 |