Metal Homeostasis in Plant Mitochondria

Vigani, Gianpiero; Hanikenne, Marc

doi:10.1002/9781118906583.ch5

Cited by 4 publications

(4 citation statements)

References 174 publications

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“…Manganese is essential for the oxygen-evolving complex and for other enzymes like Mn-superoxide dismutase (Marschner, 2011). Like Fe, also Cu is an essential cofactor of electron-transfer reactions mediated by proteins involved in photosynthesis and respiration (plastocyanin and cytochrome oxidase) (Clemens, 2001;Peñarrubia et al, 2010;Vigani and Hanikenne, 2018). Zinc is a structural constituent of many proteins as well as a cofactor for some enzymes (e.g., metalloproteinases, Cu-Zn superoxide dismutase, and carbonic anhydrase) (Krämer and Clemens, 2006;Escudero-Almanza et al, 2012;Sinclair and Kramer, 2012).…”

Section: Introductionmentioning

confidence: 99%

The Geomagnetic Field Is a Contributing Factor for an Efficient Iron Uptake in Arabidopsis thaliana

2020

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The Earth's magnetic field, defined as the geomagnetic field (GMF), is an unavoidable environmental factor for all living organisms. Variation in the GMF intensity was found to affect the content of some nutrients and their associated channels and transporters in Arabidopsis thaliana. In this work, we observed that reduction of the GMF to near null magnetic field (NNMF) affects the accumulation of metals in plant tissues, mainly iron (Fe) and zinc (Zn) content, while the content of others metals such as copper (Cu) and manganese (Mn) is not affected. Accordingly, Fe uptake genes were induced in the roots of NNMF-exposed plants and the root Fe reductase activity was affected by transferring GMF-exposed plant to NNMF condition. Under Fe deficiency, NNMF-exposed plants displayed a limitation in the activation of Fe-deficiency induced genes. Such an effect was associated with the strong accumulation of Zn and Cu observed under NNMF conditions. Overall, our results provide evidence on the important role of the GMF on the iron uptake efficiency of plants.

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Section: Introductionmentioning

confidence: 99%

The Geomagnetic Field Is a Contributing Factor for an Efficient Iron Uptake in Arabidopsis thaliana

2020

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“…In this contest, several Zn-dependent metalloproteases have been identified in plant mitochondria ( Moberg et al, 2003 ). Additionally, Zn is involved in the mitochondrial RNA editing and in in the small TIM (Translocase of the Inner Membrane) folding, and it is also requests by the COX4 subunit of cytochrome c oxidase in plant mitochondria ( Vigani and Hanikenne, 2018 and references therein).…”

Section: Discussionmentioning

confidence: 99%

Cellular Fractionation and Nanoscopic X-Ray Fluorescence Imaging Analyses Reveal Changes of Zinc Distribution in Leaf Cells of Iron-Deficient Plants

et al. 2018

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Multilevel interactions among nutrients occur in the soil-plant system. Among them, Fe and Zn homeostasis in plants are of great relevance because of their importance for plant and human nutrition. However, the mechanisms underlying the interplay between Fe and Zn in plants are still poorly understood. In order to elucidate how Zn interacts with Fe homeostasis, it is crucial to assess Zn distribution either in the plant tissues or within the cells. In this study, we investigated the subcellular Zn distribution in Fe-deficient leaf cells of cucumber plants by using two different approaches: cellular fractionation coupled with inductively coupled plasma mass spectrometry (ICP/MS) and nanoscopic synchrotron X-ray fluorescence imaging. Fe-deficient leaves showed a strong accumulation of Zn as well as a strong alteration of the organelles’ ultrastructure at the cellular level. The cellular fractionation-ICP/MS approach revealed that Zn accumulates in both chloroplasts and mitochondria of Fe deficient leaves. Nano-XRF imaging revealed Zn accumulation in chloroplast and mitochondrial compartments, with a higher concentration in chloroplasts. Such results show that (i) both approaches are suitable to investigate Zn distribution at the subcellular level and (ii) cellular Fe and Zn interactions take place mainly in the organelles, especially in the chloroplasts.

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“…In mitochondria, elements of the respiratory electron transport chain also require a significant amount of Fe in the form of cofactors (for review, see Vigani and Hanikenne, 2018 ). Similarly to plastids, the Fe transport activities of mitochondria also rely on the reduction-based strategy ( Fig.…”

Section: Compartmentalization Of Iron In Leavesmentioning

confidence: 99%

Iron in leaves: chemical forms, signalling, and in-cell distribution

Sági-Kazár

Solymosi

Solti

2022

Journal of Experimental Botany

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Iron (Fe) is an essential transition metal. Based on its redox active nature under biological conditions various Fe compounds serve as cofactor in redox enzymes. In plants, the photosynthetic machinery has the highest demand for Fe. In consequence, the delivery and incorporation of Fe into cofactors of the photosynthetic apparatus is in the focus of the Fe metabolism of leaves. Disturbance of foliar Fe homeostasis leads to impaired biosynthesis of chlorophylls and composition of the photosynthetic machinery. Nevertheless, mitochondrial function also has a significant demand for Fe. The proper incorporation of Fe to proteins and cofactors as well as a balanced intracellular Fe status in leaf cells require the ability to sense Fe but may also rely on indirect signals that report on the physiological processes connected to Fe homeostasis. Although multiple pieces of information were gained on the Fe signalling of roots, regulation of the Fe status in leaves has not yet been clarified in detail. In this review, we give an overview on the current knowledge on the foliar Fe homeostasis from the chemical forms to the allocation and sensing of Fe in leaves.

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Metal Homeostasis in Plant Mitochondria

Cited by 4 publications

References 174 publications

The Geomagnetic Field Is a Contributing Factor for an Efficient Iron Uptake in Arabidopsis thaliana

The Geomagnetic Field Is a Contributing Factor for an Efficient Iron Uptake in Arabidopsis thaliana

Cellular Fractionation and Nanoscopic X-Ray Fluorescence Imaging Analyses Reveal Changes of Zinc Distribution in Leaf Cells of Iron-Deficient Plants

Iron in leaves: chemical forms, signalling, and in-cell distribution

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