Changes in iron and organic acid concentrations in xylem sap and apoplastic fluid of iron-deficient Beta vulgaris plants in response to iron resupply

Larbi, Ajmi; Morales, Fermı́n; Abadı́a, Anunciación; Abadı́a, Javier

doi:10.1016/j.jplph.2009.09.007

Cited by 37 publications

(28 citation statements)

References 38 publications

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“…Fe 2 Cit 2 is favored when the threshold ratio is \1:75, a situation observed in some Fe-deficient plant species (Rellan-Alvarez et al 2009). This analysis confirmed also that iron is transported in xylem sap as a ferric ion (Palmer and Guerinot 2009;Rellan-Alvarez et al 2009;Larbi et al 2010;Kiczka-Cyriac 2011).…”

Section: Iron Traffickingsupporting

confidence: 74%

Low-molecular weight organic acids and peptides involved in the long-distance transport of trace metals

Kutrowska

Szeląg

2014

Acta Physiol Plant

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Higher plants evolved mechanisms of uptake, distribution and accumulation of trace metals essential for the proper functioning of the organism (e.g., copper, zinc). Non-essential metals (e.g., cadmium, arsenic, lead) can also enter plant cells using the routes dedicated to the essential ones, because of the shared similar chemical and physical properties. Generally, trace elements are very reactive, able to generate reactive oxygen species and to interact or bind various organic ligands composed of C, H, O, N, P or S. Thus, after entering to the cells, metals are transported and sequestered mainly in a complex form, bound with amino acids, organic acids, peptides or specific metal-binding ligands. Considering diverse properties (e.g., pH value, abundancy of ions, redox state) characterizing cells, tissues and phloem or xylem sap, plants use various ligands to form stable complexes in different conditions. This literature review aims to provide a comprehensive overview on the role of low-molecular weight acids and peptides in trace metals translocation.

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Section: Iron Traffickingsupporting

confidence: 74%

Low-molecular weight organic acids and peptides involved in the long-distance transport of trace metals

Kutrowska

Szeląg

2014

Acta Physiol Plant

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“…Some trace metals are chelated by organic acids, which are involved in trace metal absorption by plant roots, translocation in the xylem, and storage in the vacuole of leaf cells (Larbi et al, 2010;Wang and Zhong, 2011). Trace metals can also be bound by nicotianamine (NA) and mobilized by the yellow strike-like (YSL) family transporters (Chu et al, 2010;Harris et al, 2012).…”

Section: Translocationmentioning

confidence: 99%

Influence of Soil Chemistry and Plant Physiology in the Phytoremediation of Cu, Mn, and Zn

Pinto

Aguiar

Ferreira

2014

Critical Reviews in Plant Sciences

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“…For example, Fe resupply leads to increases in Chl concentration and photosynthetic rate [15,16] and decreases in the concentration of organic acids [4,17]. Additionally, the reduction of the carboxylate concentration in xylem sap and in leaf apoplast was also reported in sugar beet [18] and fruit trees [19]. At root level, the deactivation of some acquisition mechanisms, including FRO (ferric reductase oxidase) and IRT (iron-regulated transporter) was reported [1,4,20,21].…”

Section: Introductionmentioning

confidence: 99%

Development and recovery of iron deficiency by iron resupply to roots or leaves of strawberry plants

Pestana

Correia

Saavedra

et al. 2012

Plant Physiology and Biochemistry

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Bare root transplants of strawberry (Fragaria x ananassa Duch. cv. 'Selva') were transferred to nutrient solutions with or without iron (Fe). After six weeks of growth, plants in the solution without Fe were chlorotic and had morphological changes in roots typical of Fe deficiency. At this point, four treatments were imposed with three replicates (plants) each: plants always grown without sulphate every two days (Fe-leaves); chlorotic plants transferred to a solution with ferrous sulphate (Fe-solution). These plants were grown for nine days through which period chlorophyll (Chl) in leaves was estimated with a SPAD-502 apparatus. At the beginning and end of the experiment, root ferric chelate reductase (FC-R; EC 1.16.1.17) activity and the mineral composition of leaves and roots were measured. Six days after the addition of Fe to the solution (Fe-solution) leaves had Chl content similar to (Fe10). When Fe was applied to leaves (Fe-leaves), a slight regreening of new leaves was observed only at the end of the experiment. At this date, the FC-R activity remained the same in (Fe10) and increased even further in (Fe0). Plants in the Fe-solution treatment maintained an FC-R activity similar to the initial value in chlorotic plants, while the activity was drastically reduced in plants of treatment (Fe-leaves). The Fe concentration in leaves of (Fe0) and (Fe10) was similar, while application of Fe to leaves or nutrient solution resulted in an enhanced concentration of Fe in leaves. In contrast to what happened in Fe-solution, application of Fe to leaves did not lead to an increase in the concentration of Fe in roots. Root FC-R was correlated with the concentrations of Mn, Zn and Cu in leaves and with Cu in roots. Under our experimental conditions, FC-R activity in strawberry may be rapidly de-activated by pulses of Fe applied by foliar sprays. On the other hand, this de-activation mechanism is slower if Fe is applied directly to roots, suggesting a greater opportunity for plants to uptake more Fe. Please kindly consider the manuscript Recovery of iron deficiency by iron resupply to roots or leaves of strawberry plants for publication in Plant Physiology andBiochemistry. In this manuscript we present information involving the responses of Fedeficient plants resupplied with Fe, which may provide crucial information for the optimization of the Fe-fertilization strategies. The aims of the present study were to characterize the changes induced by Fe depletion on the chlorophyll content, root FC-R and mineral composition of roots and leaves and to compare two different ways to resupply Fe: by foliar or root fertilization. We also discuss the agronomical consequences of Fe resupply by fertilization. Cover Letter The FC-R activity was higher in chlorotic plants than in green plants. The concentrations of Cu, Mn and Zn in roots of chlorotic plants were higher than those presented by green plants. FC-R activity in strawberry may be rapidly de-activated by Fe applied by foliar sprays. The de-activation mechanism is s...

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Changes in iron and organic acid concentrations in xylem sap and apoplastic fluid of iron-deficient Beta vulgaris plants in response to iron resupply

Cited by 37 publications

References 38 publications

Low-molecular weight organic acids and peptides involved in the long-distance transport of trace metals

Low-molecular weight organic acids and peptides involved in the long-distance transport of trace metals

Influence of Soil Chemistry and Plant Physiology in the Phytoremediation of Cu, Mn, and Zn

Development and recovery of iron deficiency by iron resupply to roots or leaves of strawberry plants

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