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In situ analysis of foliar zinc absorption and short-distance movement in fresh and hydrated leaves of tomato and citrus using synchrotron-based X-ray fluorescence microscopy.
Du, Yumei; Kopittke, Peter M; Noller, Barry N; James, Simon A; Harris, Hugh H; Xu, Zhi Ping; Li, Peng; Mulligan, David R; Huang, Longbin.
Afiliación
  • Du Y; Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, St Lucia, Queensland 4072, Australia, School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia, Australian Synchrotron, Clayton, Victoria 3168, Austr
  • Kopittke PM; Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, St Lucia, Queensland 4072, Australia, School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia, Australian Synchrotron, Clayton, Victoria 3168, Austr
  • Noller BN; Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, St Lucia, Queensland 4072, Australia, School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia, Australian Synchrotron, Clayton, Victoria 3168, Austr
  • James SA; Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, St Lucia, Queensland 4072, Australia, School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia, Australian Synchrotron, Clayton, Victoria 3168, Austr
  • Harris HH; Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, St Lucia, Queensland 4072, Australia, School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia, Australian Synchrotron, Clayton, Victoria 3168, Austr
  • Xu ZP; Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, St Lucia, Queensland 4072, Australia, School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia, Australian Synchrotron, Clayton, Victoria 3168, Austr
  • Li P; Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, St Lucia, Queensland 4072, Australia, School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia, Australian Synchrotron, Clayton, Victoria 3168, Austr
  • Mulligan DR; Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, St Lucia, Queensland 4072, Australia, School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia, Australian Synchrotron, Clayton, Victoria 3168, Austr
  • Huang L; Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, St Lucia, Queensland 4072, Australia, School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia, Australian Synchrotron, Clayton, Victoria 3168, Austr
Ann Bot ; 115(1): 41-53, 2015 Jan.
Article en En | MEDLINE | ID: mdl-25399024
ABSTRACT
BACKGROUND AND

AIMS:

Globally, zinc deficiency is one of the most important nutritional factors limiting crop yield and quality. Despite widespread use of foliar-applied zinc fertilizers, much remains unknown regarding the movement of zinc from the foliar surface into the vascular structure for translocation into other tissues and the key factors affecting this diffusion.

METHODS:

Using synchrotron-based X-ray fluorescence microscopy (µ-XRF), absorption of foliar-applied zinc nitrate or zinc hydroxide nitrate was examined in fresh leaves of tomato (Solanum lycopersicum) and citrus (Citrus reticulatus). KEY

RESULTS:

The foliar absorption of zinc increased concentrations in the underlying tissues by up to 600-fold in tomato but only up to 5-fold in citrus. The magnitude of this absorption was influenced by the form of zinc applied, the zinc status of the treated leaf and the leaf surface to which it was applied (abaxial or adaxial). Once the zinc had moved through the leaf surface it appeared to bind strongly, with limited further redistribution. Regardless of this, in these underlying tissues zinc moved into the lower-order veins, with concentrations 2- to 10-fold higher than in the adjacent tissues. However, even once in higher-order veins, the movement of zinc was still comparatively limited, with concentrations decreasing to levels similar to the background within 1-10 mm.

CONCLUSIONS:

The results advance our understanding of the factors that influence the efficacy of foliar zinc fertilizers and demonstrate the merits of an innovative methodology for studying foliar zinc translocation mechanisms.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Zinc / Citrus / Solanum lycopersicum / Fertilizantes Idioma: En Revista: Ann Bot Año: 2015 Tipo del documento: Article

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Zinc / Citrus / Solanum lycopersicum / Fertilizantes Idioma: En Revista: Ann Bot Año: 2015 Tipo del documento: Article