Tolerance to iron accumulation and its effects on mineral composition and growth of two grass species

Araújo, Talita Oliveira de; Freitas-Silva, Larisse de; Santana, Brenda Vila Nova; Kuki, Kacilda Naomi; Pereira, Eduardo Gusmão; Azevedo, Aristéa Alves; Silva, Luzimar Campos da

doi:10.1007/s11356-013-2201-0

Cited by 16 publications

(12 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some authors state that the plaque may either decrease or increase absorption of certain nutrients and metals (Jiang et al 2009;Seyfferth et al 2010;Wang et al 2010;Zhong et al 2010;Liu et al 2011). In a study with the same two species and same Fe-EDTA concentrations (Araújo et al 2014), it has been verified on root surfaces the deposition of high iron contents, i.e., part of the Fe available for absorption in the nutrient solution precipitated as iron oxide hydroxide, thus becoming unavailable for absorption by the two species. However, although the iron plaque may have reduced Fe absorption, P. urvillei and S. parviflora both accumulated high Fe contents within the roots.…”

Section: Discussionmentioning

confidence: 99%

“…Kerguélen and Paspalum urvillei Steudel are commonly found spontaneously at the margins of a decantation pond, in an iron ore pelletizing industry located in the community of Ubu, Anchieta city, state of Espírito Santo, Brazil. Besides tolerating high Fe concentrations in the substrate, both species accumulate in their tissue iron contents above the toxicity limit, which according to Marschner (1995) is 500 mg kg −1 , without altering their growth (Araújo et al 2014). Species exposed to high iron concentrations may exhibit characteristic visual toxicity symptoms (Santana et al 2014), even when not presenting changes in their growth (Araújo et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Besides tolerating high Fe concentrations in the substrate, both species accumulate in their tissue iron contents above the toxicity limit, which according to Marschner (1995) is 500 mg kg −1 , without altering their growth (Araújo et al 2014). Species exposed to high iron concentrations may exhibit characteristic visual toxicity symptoms (Santana et al 2014), even when not presenting changes in their growth (Araújo et al 2014).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Morphoanatomical responses induced by excess iron in roots of two tolerant grass species

Araújo

Freitas-Silva

Santana

et al. 2014

Environ Sci Pollut Res

Self Cite

View full text Add to dashboard Cite

We aimed to verify whether morphoanatomic alterations occur in response to excess iron, in roots of Setaria parviflora and Paspallum urvillei (Poaceae), and to localize the presence of the sites of iron accumulation. Plants were subjected to 0.009, 1, 2, 4, and 7 mM Fe-EDTA in nutrient solution. Both species presented iron contents in the roots above the critical toxicity level. The presence of iron plaque on roots of the two species was confirmed, and it may have reduced iron absorption by the plants. Roots from the two species showed typical visual symptoms of stress by excess iron: change in color and mucilaginous and flaccid appearance. Anatomical damage was observed in both species: aerenchyma disruption, alterations in endodermal cells, and irregular shape of both vessel and sieve tube elements. The metal was histolocalized in the cortex and in protoxylem and metaxylem cell walls in both species, which suggests a detoxification strategy for the excess iron. Phenolic compounds were not histolocalized in roots. Microscopic analyses were therefore effective in evaluating the real damage caused by excess iron.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Morphoanatomical responses induced by excess iron in roots of two tolerant grass species

Araújo

Freitas-Silva

Santana

et al. 2014

Environ Sci Pollut Res

Self Cite

View full text Add to dashboard Cite

show abstract

“…Although in this study we did not evaluate the root anatomical structures, these adaptations are frequently observed in grasses, including the Paspalum genus. This tolerance mechanism is behind the spontaneous growth of the perennial grasses Paspalum urvillei Steudel and Setaria parviflora, found at the borders of the decantation ponds of the iron pelletizing industry [68] and the high iron tolerance of Paspalum densum (Poir.) and Echinochloa crus-galli (L.) P. Beauv.…”

Section: The Iron Exclusion Behavior Reveals An Important Tolerance Mechanism Which Would Be Helpful In the Rehabilitation Of Iron Miningmentioning

confidence: 99%

Native Amazonian Canga Grasses Show Distinct Nitrogen Growth Responses in Iron Mining Substrates

Caldeira¹,

Lima²,

Ramos³

et al. 2021

Plants

View full text Add to dashboard Cite

Native species may have adaptive traits that are advantageous for overcoming the adverse environmental conditions faced during the early stages of mine land rehabilitation. Here, we examined the nitrogen (N) growth responses of two native perennial grasses (Axonopus longispicus and Paspalum cinerascens) from canga in nutrient-poor iron mining substrates. We carried out vegetative propagation and recovered substantial healthy tillers from field-collected tussocks of both species. These tillers were cultivated in mining substrates at increasing N levels. The tillering rates of both species increased with the N application. Nonetheless, only in P. cinerascens did the N application result in significant biomass increase. Such growth gain was a result of changes in leaf pigment, stomatal morphology, gas exchanges, and nutrients absorption that occurred mainly under the low N additions. Reaching optimum growth at 80 mg N dm−3, these plants showed no differences from those in the field. Our study demonstrates that an input of N as fertilizer can differentially improve the growth of native grasses and that P. cinerascens plants are able to deposit high quantities of carbon and protect soil over the seasons, thus, making them promising candidates for restoring nutrient cycling, accelerating the return of other species and ecosystem services.

show abstract

“…Steudel., Juncus bulbosus L., Glyceria fluitans L. and Oryza sativa L. (Lucassen et al, 2000;Hansel et al, 2001;De Araújo et al, 2014). The iron plaque on the root of wetland plant has an -OH functional group that can react with cations and anions, also influence the uptake of nutrients and toxic metals such as P, Cu, Mn, Cd and As (De Araújo et al, 2014). Examinations using electron microscopy and X-ray microprobe scans of Fe plaques have also shown that newly formed Fe-rich colloids frequently contain a large amount of P outside the roots of Phalaris arundinacea L. and Sparganium americanum Nutt.…”

Section: Introductionmentioning

confidence: 99%

Iron Regulation of Wetland Vegetation Performance Through Synchronous Effects on Phosphorus Acquisition Efficiency

et al. 2018

View full text Add to dashboard Cite

Iron-rich groundwater flowing into wetlands is a worldwide environmental pollution phenomenon that is closely associated with the stability of wetland ecosystems. Combined with high phosphorus (P) loading from agricultural runoff, the prediction of the evolution of wetland vegetation affected by compound contamination is particularly urgent. We tested the effects of anaerobic iron-rich groundwater discharge in a freshwater marsh by simulating the effect of three levels of eutrophic water on native plants (Glyceria spiculosa (Fr. Schmidt.) Rosh.). The management of wetland vegetation with 1-20 mg/L Fe input is an efficient method to promote the growth of plants, which showed an optimum response under a 0.10 mg/L P surface water environment. Iron-rich groundwater strongly affects the changes in ecological niches of some wetland plant species and the dominant species. In addition, when the P concentration in a natural body of water is too high, the governance effect of eutrophication might not be as expected. Under iron-rich groundwater conditions, the δ 13 C values of organs were more depleted, which can partially explain the differences in δ 13 C in the soil profile. Conversely, the carbon isotope composition of soil organic carbon is indicative of past changes in vegetation. The results of our experiments confirm that iron-rich groundwater discharge has the potential to affect vegetation composition through toxicity modification in eutrophic environments.

show abstract

Tolerance to iron accumulation and its effects on mineral composition and growth of two grass species

Cited by 16 publications

References 22 publications

Morphoanatomical responses induced by excess iron in roots of two tolerant grass species

Morphoanatomical responses induced by excess iron in roots of two tolerant grass species

Native Amazonian Canga Grasses Show Distinct Nitrogen Growth Responses in Iron Mining Substrates

Iron Regulation of Wetland Vegetation Performance Through Synchronous Effects on Phosphorus Acquisition Efficiency

Contact Info

Product

Resources

About