Unveiling Foliar-Applied Calcium Translocation in Tomato: Evidence from Leaf-to-Fruit Movement Using Strontium Tracer
Rattachement africain : br, ca, fr, it. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Calcium (Ca) deficiency can impair fruit development even under optimal soil Ca levels due to its transpiration-dependent transport. Because fruits exhibit significantly lower transpiration rates than leaves, any further reduction in fruit transpiration during development can limit Ca delivery, leading to lower fruit Ca content and diminished quality. Foliar application of Ca offers a potential strategy to mitigate these effects; however, its low mobility in the phloem often limits treatment efficacy. To better understand this phenomenon, we employed X-ray fluorescence spectroscopy (XRF) to investigate the penetration and transport of foliar-applied Ca, using strontium (Sr) as a physiological tracer. Based on the prevailing paradigm that Ca is largely immobile in the phloem, we evaluated the influence of osmotic regulators, sucrose, mannitol, glycerol, and potassium, on Ca transport. Results showed that Sr was effectively translocated to distal tissues. While potassium and mannitol had no significant impact on transport kinetics, sucrose and glycerol showed a trend toward enhancing Sr movement. XRF imaging of leaf tissue revealed that Sr was primarily transported through the apoplast toward the leaf margin. Moreover, foliar application of Sr combined with sucrose significantly increased Sr accumulation in seeds and in the apical portion of tomato fruits. These findings suggest that sucrose has the potential to actively enhance foliar-applied Ca mobility by acting as an osmotic regulator, accelerating short-range apoplastic movement within leaf tissues and long-distance systemic translocation to the fruit.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Unveiling Foliar-Applied Calcium Translocation in Tomato: Evidence from Leaf-to-Fruit Movement Using Strontium Tracer
- Date Crossref
- 15/09/2026
- Éditeur
- Oxford University Press (OUP)
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Universidade de São Paulo Centro de Energia Nuclear na Agricultura pays non établi dans la noticeUniversité ou école supérieure
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Canadian Light Source (Canada) pays non établi dans la noticeEntreprise
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European Synchrotron Radiation Facility pays non établi dans la noticeStructure de recherche
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Sapienza University of Rome Department of Biology and Biotechnology Charles Darwin pays non établi dans la noticeUniversité ou école supérieure
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University of Saskatchewan Department of Plant Sciences pays non établi dans la noticeUniversité ou école supérieure
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Canadian Light Source Inc. pays non établi dans la noticeEntreprise
Centro de Energia Nuclear na Agricultura — Universidade de São Paulo, Canadian Light Source (Canada) et European Synchrotron Radiation Facility, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.