Mineral Deficiencies

Peiter, Edgar

doi:10.1002/9783527686063.ch11

Cited by 3 publications

(2 citation statements)

References 47 publications

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“…Iron (Fe) is an essential microelement for plants, finding its major role as a cofactor in redox-active proteins (Kobayashi and Nishizawa, 2012;Peiter, 2014). Although Fe is highly abundant in the earth's crust, in aerated soils, Fe forms poorly soluble hydroxides, oxides, and other inorganic precipitates, all of which are not readily available for plant uptake (Lindsay and Schwab, 1982).…”

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The Vacuolar Manganese Transporter MTP8 Determines Tolerance to Iron Deficiency-Induced Chlorosis in Arabidopsis

et al. 2015

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The Vacuolar Manganese Transporter MTP8 Determines Tolerance to Iron Deficiency-Induced Chlorosis in Arabidopsis

et al. 2015

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“…Phosphate (P) is often limiting for growth and yield formation of crops (Buczko et al, 2018). To improve P acquisition, plants employ a wide range of morphological and physiological adaptations (Peiter, 2014). In response to P deficiency, many plant species acidify the rhizosphere and release root exudates, such as carboxylates and phenolics, that mobilize P from sparingly soluble compounds (Dinkelaker et al, 1997).…”

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The vacuolar transporterLaMTP8.1 detoxifies manganese in leaves ofLupinus albus

Olt

Alejandro

Fermum

et al. 2022

Physiologia Plantarum

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Manganese (Mn) is an essential microelement, but overaccumulation is harmful to many plant species. Most plants have similar minimal Mn requirements, but the tolerance to elevated Mn varies considerably. Mobilization of phosphate (P) by plant roots leads to increased Mn uptake, and shoot Mn levels have been reported to serve as an indicator for P mobilization efficiency in the presence of P deficiency. White lupin (Lupinus albus L.) mobilizes P and Mn with outstanding efficiency due to the formation of determinate cluster roots that release carboxylates. The high Mn tolerance of L. albus goes along with shoot Mn accumulation, but the molecular basis of this detoxification mechanism has been unknown. In this study, we identify LaMTP8.1 as the transporter mediating vacuolar sequestration of Mn in the shoot of white lupin. The function of Mn transport was demonstrated by yeast complementation analysis, in which LaMTP8.1 detoxified Mn in pmr1∆ mutant cells upon elevated Mn supply. In addition, LaMTP8.1 also functioned as an iron (Fe) transporter in yeast assays. The expression of LaMTP8.1 was particularly high in old leaves under high Mn stress. However, low P availability per se did not result in transcriptional upregulation of LaMTP8.1. Moreover, LaMTP8.1 expression was strongly upregulated under Fe deficiency, where it was accompanied by Mn accumulation, indicating a role in the interaction of these micronutrients in L. albus. In conclusion, the tonoplast‐localized Mn transporter LaMTP8.1 mediates Mn detoxification in leaf vacuoles, providing a mechanistic explanation for the high Mn accumulation and Mn tolerance in this species.

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Trace metal metabolism in plants

Andresen

Peiter

Küpper

2018

Journal of Experimental Botany

326

218

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Many trace metals are essential micronutrients, but also potent toxins. Due to natural and anthropogenic causes, vastly different trace metal concentrations occur in various habitats, ranging from deficient to toxic levels. Therefore, one focus of plant research is on the response to trace metals in terms of uptake, transport, sequestration, speciation, physiological use, deficiency, toxicity, and detoxification. In this review, we cover most of these aspects for the essential micronutrients copper, iron, manganese, molybdenum, nickel, and zinc to provide a broader overview than found in other recent reviews, to cross-link aspects of knowledge in this very active research field that are often seen in a separated way. For example, individual processes of metal usage, deficiency, or toxicity often were not mechanistically interconnected. Therefore, this review also aims to stimulate the communication of researchers following different approaches, such as gene expression analysis, biochemistry, or biophysics of metalloproteins. Furthermore, we highlight recent insights, emphasizing data obtained under physiologically and environmentally relevant conditions.

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Mineral Deficiencies

Cited by 3 publications

References 47 publications

The Vacuolar Manganese Transporter MTP8 Determines Tolerance to Iron Deficiency-Induced Chlorosis in Arabidopsis

The Vacuolar Manganese Transporter MTP8 Determines Tolerance to Iron Deficiency-Induced Chlorosis in Arabidopsis

The vacuolar transporterLaMTP8.1 detoxifies manganese in leaves ofLupinus albus

Trace metal metabolism in plants

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