Revisiting the iron pools in cucumber roots: identification and localization

Kovács, Krisztina; Pěchoušek, Jiří; Machala, Libor; Zbořil, Radek; Klencsár, Z.; Solti, Ádám; Tóth, Brigitta; Müller, Brigitta; Pham, Hong Diep; Kristóf, Zoltán; Fodor, Ferenc

doi:10.1007/s00425-016-2502-x

Cited by 12 publications

(7 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As consequence, Fe translocation (TR)to the leaf for this teratment decreases as compared to the TR of Fe3+:HBED (Table ), indicating the low stability of the Fe3+:G7 (1:05). This accumulation was also observed by Kovács et al . when using Fe 3+ :citrate but not when stable synthetic chelates were used.…”

Section: Discussionsupporting

confidence: 71%

Effect of Fe:ligand ratios on hydroponic conditions and calcareous soil in Solanum lycopersicum L. and Glycine max L. fertilized with heptagluconate and gluconate

et al. 2019

View full text Add to dashboard Cite

BACKGROUND: The environmental risk from the application of synthetic chelates has led to the use of biodegradable complexes to correct Fe deficiency in plants. In this article, the Fe oxidation state, the Fe:ligand ratio, and the molecular weight distribution for heptagluconate (G7) and gluconate (G6) are considered as key factors for the efficacy of complexes as fertilizers. Complexes with different Fe:ligand ratios were prepared and analyzed by gel filtration chromatography (GFC). The ability of Fe:ligand ratios to provide Fe to tomato in hydroponics and soybean in calcareous soil was tested and compared with synthetic chelates (Fe 3+ :HBED and Fe 3+ :EDTA). RESULTS: G7 presented greater capacity to complex both Fe(II) and Fe(III) than G6, but the Fe(II) complexes exhibited poor stability at pH 9 and oxidation in solution.Gel filtration chromatography demonstrated the polynuclear nature of the Fe 3+ :G7 at various ratios. The effectiveness of the Fe fertilizers depend on the Fe 3+ :ligand ratio and the ligand type, the Fe 3+ :G7 (1:1 and 1:2) being the most effective. Fe 3+ :G7 (1:1) also presented a better response for the uptake of other micronutrients. CONCLUSION: Fe 3+ :G7 molar ratios have been shown to be critical for plant Fe uptake under hydroponic conditions and with calcareous soil. Thus, the Fe 3+ :G7 at equimolar ratio and 1:2 molar ratio can be an environmentally friendly alternative to less degradable synthetic chelates to correct Fe chlorosis in strategy I plants.

show abstract

Section: Discussionsupporting

confidence: 71%

Effect of Fe:ligand ratios on hydroponic conditions and calcareous soil in Solanum lycopersicum L. and Glycine max L. fertilized with heptagluconate and gluconate

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Thomine et al propose that most of the iron is stored as ferritin in the plastids (chloroplasts contain up to 90% of the leaf cell iron), with about half in the stroma and the rest in the thylakoid membranes. In cucumber plants supplied with 57 Fe(III) citrate, Kovács et al observed a transient presence of Fe carboxylates in removable forms and the accumulation of partially removable, amorphous hydrous ferric oxide/hydroxide that were identified in the apoplast and on the root surface, respectively. They did not observe ferritin accumulation at optimal iron supply.…”

Section: Introductionmentioning

confidence: 99%

Iron and Humic Acid Accumulation on Soybean Roots Fertilized with Leonardite Iron Humates under Calcareous Conditions

Cieschi

Lucena

2018

J. Agric. Food Chem.

View full text Add to dashboard Cite

Iron humates are eco-friendly fertilizers that are less efficient than iron synthetic chelates at correcting iron chlorosis. The aim of this work was to improve the efficiency of a leonardite iron humate (LIH), by studying the relationship among humic acid (HA) accumulation, iron biomineralization on soybean roots, and iron nutrition in soybean plants under calcareous conditions. Two hydroponic experiments were performed: a short-term bioassay (21 days) with several doses (10, 20, 50, and 100 μmol of Fe pot–1) of LIH applied once a week and a long-term bioassay (60 days) with just one application of LIH (250 μmol of Fe pot–1). When LIH was applied several times, it precipitated on the root, blocking the cell wall pores and reducing iron transport in plants, while these effects decreased when LIH was applied just once, thus favoring iron uptake by the plants and avoiding HA accumulation. Jarosite was observed on the surface of soybean roots.

show abstract

“…Since high TF is always positively associated with FWB, we examined the role of iron in the control of FWB. We used ethylenediaminedi- O -hydroxyphenylacetic acid (EDDHA) compound, one of the most efficient iron-chelating agents, to reduce available iron in the medium 30 , 31 . Addition of EDDHA (final concentration of 4 mM) completely suppressed the growth of Foc TR4 in comparison with the control on PDA (Fig.…”

Section: Resultsmentioning

confidence: 99%

Spatiotemporal biocontrol and rhizosphere microbiome analysis of Fusarium wilt of banana

Zhu

Deng

et al. 2023

Commun Biol

View full text Add to dashboard Cite

The soil-borne fungus Fusarium oxysporum f. sp. cubense tropical race 4 (Foc TR4) causes Fusarium wilt of banana (FWB), which devastates banana production worldwide. Biocontrol is considered to be the most efficient approach to reducing FWB. Here we introduce an approach that spatiotemporally applies Piriformospore indica and Streptomyces morookaensis strains according to their respective strength to increase biocontrol efficacy of FWB. P. indica successfully colonizes banana roots, promotes lateral root formation, inhibits Foc TR4 growth inside the banana plants and reduces FWB. S. morookaensis strain Sm4-1986 secretes different secondary compounds, of which xerucitrinin A (XcA) and 6-pentyl-α-pyrone (6-PP) show the strongest anti-Foc TR4 activity. XcA chelates iron, an essential nutrient in pathogen-plant interaction that determines the output of FWB. 6-PP, a volatile organic compound, inhibits Foc TR4 germination and promotes banana growth. Biocontrol trials in the field demonstrated that application of S. morookaensis lead to improvement of soil properties and increase of rhizosphere-associated microbes that are beneficial to banana growth, which significantly reduces disease incidence of FWB. Our study suggests that optimal utilization of the two biocontrol strains increases efficacy of biocontrol and that regulating iron accessibility in the rhizosphere is a promising strategy to control FWB.

show abstract

Revisiting the iron pools in cucumber roots: identification and localization

Cited by 12 publications

References 34 publications

Effect of Fe:ligand ratios on hydroponic conditions and calcareous soil in Solanum lycopersicum L. and Glycine max L. fertilized with heptagluconate and gluconate

Effect of Fe:ligand ratios on hydroponic conditions and calcareous soil in Solanum lycopersicum L. and Glycine max L. fertilized with heptagluconate and gluconate

Iron and Humic Acid Accumulation on Soybean Roots Fertilized with Leonardite Iron Humates under Calcareous Conditions

Spatiotemporal biocontrol and rhizosphere microbiome analysis of Fusarium wilt of banana

Contact Info

Product

Resources

About