Mobilization of iron and other micronutrient cations from a calcareous soil by plant-borne, microbial, and synthetic metal chelators

Treeby, M. T.; Marschner, H.; Römheld, Volker

doi:10.1007/bf02220801

Cited by 302 publications

(153 citation statements)

References 19 publications

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“…The insoluble Fe sources mainly subjected to weathering by MS s are Fe-containing primary silicates and Fe (hydr)oxides (Kraemer 2004). It has been observed that the smaller the particles, the greater (tenfold) the dissolution rate of these particles; in particular, those with sub-10 nm size are particularly available to aerobic microbes and, following the attack by MS s , able to guarantee sufficient Fe for bacterial growth (Treeby et al 1989). In addition to Fe minerals, MS s may also be able to remove Fe from organic complexes (like Fe complexed by organic acids, phenols, soil humic substances [HS], etc.)…”

Section: Fe Complexation Processesmentioning

confidence: 99%

Review on iron availability in soil: interaction of Fe minerals, plants, and microbes

et al. 2013

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Section: Fe Complexation Processesmentioning

confidence: 99%

Review on iron availability in soil: interaction of Fe minerals, plants, and microbes

et al. 2013

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“…However, a universal role of phytosiderophores in the acquisition of micronutrient metals has been proposed (Crowley, Reid & Szaniszlo, 1987), since PS form stable chelates with Zn, Mn and Cu (Nomoto, Sugiura & Takagi, 1987 ;Murakami et al, 1989), they extract considerable amounts of Zn, Mn and Cu from calcareous soils (e.g. Treeby, Marschner & Ro$ mheld, 1989), and deficiencies of Zn, Mn and Cu are quite common on calcareous and non-calcareous soils.…”

Section: mentioning

confidence: 99%

Copper‐deficiency‐induced phytosiderophore release in in the calcicole grass Hordelymus europaeus

1998

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Phytosiderophore (PS) release occurs under both iron and zinc deficiencies in representative Poaceae and has been speculated to be a general adaptive response to enhance the acquisition of micronutrient metals. We tested this hypothesis within an on-going study of the role of micronutrient metal nutrition for patterns of spontaneous vegetation in relation to soil pH and carbonate content. Hordelymus europaeus (L.) Harz, a negative grass species commonly found on soils rich in CaCO $ in Western Central Europe, was subjected to deficiencies of Fe, Zn, Mn and Cu using chelator-buffered nutrient solutions. PS release rates were determined at 3-5 d intervals during onset and development of deficiency symptoms. Plant dry matter yields and nutrient concentrations, measured at three time points were used to construct growth curves for calculation of PS release per unit root mass. In comparison with trace metal-sufficient control plants, dry matter production was markedly reduced in the Fe, Zn, Mn and Cudeficiency treatments, with final relative yields of 6, 11, 15 and 31 %, respectively. The phytosiderophore produced under Fe-and Cu-deficiency treatments was identified, using HPLC, as desoxymugineic acid. The highest rate of PS release (18 µmol g −" root d. wt in 2 h) was measured in the Fe-deficiency treatment, and there was substantial release in the Cu-deficiency treatment (7n25 µmol g −" root d. wt in 2 h). No PS release above control levels (2n6 µmol g −" root d. wt in 2 h) was observed in the Zn-or Mn-deficiency treatments (1n5 and 2n6 µmol g −" root d. wt in 2 h, respectively). It remains to be clarified whether PS release in response to Cu deficiency is a primary reaction to the deficiency, or is caused by a chain of events similar to that observed in Zndeficient wheat, which involves internal Fe deficiency. Our results suggest that PS release in the native plant species H. europaeus is a specific response to Fe and Cu deficiency and is not significantly induced in response to deficiencies of Zn and Mn. Induction of the PS mechanism in different plant species might be more diverse than previously thought.

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“…The higher K accumulation by mycorrhizal plants in saline soils was reported to be beneficial in maintaining high K/Na ratio (Giri et al 2007). Earlier studies on use of phyto-ameliorants attributed the secretion of higher organic acids in the rhizosphere due to the decomposition of the biomass, which helps in diluting the carbonates and also decreasing the pH of the soil (Treeby et al 1989;Ghaly 2002). Taken together, corm treatment and foliar application during the critical stage of growth using native rhizobacterial strains of CSR-B-3, CSR-B-2, and CSR-G-1 were significantly effective in reducing the adverse effect of salt stress (sodicity) in gladiolus under sodic soil conditions, resulting in improved production levels.…”

Section: Discussionmentioning

confidence: 99%

Rhizosphere and endophytic bacteria for induction of salt tolerance in gladiolus grown in sodic soils

Damodaran

Rai

Jha

et al. 2014

Journal of Plant Interactions

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Extensive development of canal irrigation system led to formation of unproductive sodic lands, which limited the cultivation of flower crop gladiolus in the basins of major rivers. The purpose of this study was to isolate native rhizospheric and endophytic bacteria from sodic environment and evaluate their growth enhancement and bio-ameloirant properties in gladiolus under sodic soils. Sixteen isolates of plant-growth-promoting rhizospheric and endophytic bacteria were isolated and screened for growth promotion potential. The promising strains were identified and evaluated for growth and production in gladiolus. The plants treated with strains CSR-G-1, CSR-B-2, and CSR-B-3 significantly produced marketable spikes and higher number of florets/spike. Also, the treated plants showed an increased activity of superoxide dismutase, phenyl alanine lyase, catalase, peroxidase, phenols, and proline than control. Further, the soil pH, total carbonates, and sodium adsorption ratio were lower in treated soils. The Na + /K + ratio in leaves of treated plants was observed to be lower than control. In conclusion, these bio-inoculums can be used as growth enhancer and bioameliorant in sodic soils as an eco-friendly management strategy.

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Mobilization of iron and other micronutrient cations from a calcareous soil by plant-borne, microbial, and synthetic metal chelators

Cited by 302 publications

References 19 publications

Review on iron availability in soil: interaction of Fe minerals, plants, and microbes

Review on iron availability in soil: interaction of Fe minerals, plants, and microbes

Copper‐deficiency‐induced phytosiderophore release in in the calcicole grass Hordelymus europaeus

Rhizosphere and endophytic bacteria for induction of salt tolerance in gladiolus grown in sodic soils

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