Growth of tropical grasses in Oxisol contaminated by nickel

Silva, Enilson; Souza, Francisco V. de; Grazziotti, Paulo Henrique; Alleoni, Luís Reynaldo Ferracciú; Nardis, Bárbara Olinda; Ferreira, Evander Alves

doi:10.4067/s0718-58392017000300273

Cited by 4 publications

(10 citation statements)

References 20 publications

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“…The maximum concentrations (MC) of Ni (Figure 2) can be considered as recommended concentrations of Ni for the growth of grasses in soils. The recommended average concentration of 30 mg kg −1 of Ni is in the range commonly found in agricultural soils [13] and reinforces the essentiality of Ni for plants [1,2]. On the other hand, the MC of Ni (Figure 2) was below the investigation value (70 mg kg −1 of Ni) established by Brazilian legislation for agricultural soils [12].…”

Section: Discussionsupporting

confidence: 52%

“…The basal fertilization rates adhered to recommended guidelines [1], except phosphate fertilization, where the fertilization rate was determined based on the maximum phosphorus adsorption capacity of each soil (Table 1), extrapolated from Langmuir isotherm second region data [19]. Consequently, the applied phosphorus rates were 200 mg for Typic Quartzipsamment (TQ) and 450 mg for Rhodic Hapludox (RH) per kg of soil, utilizing NaH 2 PO 4 as the phosphorus source.…”

Section: Soil and Experimental Designmentioning

confidence: 99%

“…Nickel (Ni) is a micronutrient for normal plant growth and development [1,2] and is required in very small concentrations for optimum plant growth [2]. It is extremely toxic in high concentrations and is among the most common heavy metals in soils [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…The grasses scrutinized in this investigation encompass species such as Megathyrsus maximus and Urochloa decumbens, exhibiting noteworthy biomass generation and swift growth rates [1]. Grasses are categorized based on their handling and soil fertility prerequisites [10].…”

Section: Introductionmentioning

confidence: 99%

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Nickel Effects on Growth and Phytolith Yield of Grasses in Contaminated Soils

Silva,

Farnezi,

Santos

et al. 2024

Soil Systems

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Nickel (Ni) is extremely toxic to plants at high concentrations. Phytoliths have the potential to sequester the heavy metals absorbed by plants and act as a detoxification mechanism for the plant. The authors of the present study aimed to evaluate the effects of Ni on the growth and phytolith yield of grasses in two artificially contaminated soils. Two experiments separated by soil types (Typic Quartzipsamment and Rhodic Hapludox) were conducted in a completely randomized design in a 2 × 4 factorial scheme with three replications. The factors were two species of grass (Urochloa decumbens and Megathyrsus maximus) and three concentrations of Ni (20, 40, and 120 mg kg−1) and control treatment. The grasses were influenced by the increase in Ni rates in the soils. Ni exerted a micronutrient function with the addition of 30 mg kg−1 of Ni in soils, but this concentration caused toxicity in grasses. Such a level is lower than the limits imposed by the Brazilian environmental legislation. Higher Ni availability in Typic Quartzipsamment promoted Ni toxicity, with reduced growth and increased phytolith yield in the shoot, increased Ni in the shoot, and Ni occlusion in phytoliths by grasses, in comparison with Rhodic Hapludox. The yield and Ni capture in phytoliths by grasses in Ni-contaminated soils are related to the genetic and physiological differences between grasses and Ni availability in soils. Ni capture by phytoliths indicates that it may be one of the detoxification mechanisms of Urochloa decumbens to Ni contamination, providing additional tolerance. Megathyrsus maximus may be a future grass for the phytoremediation technique in Ni-contaminated soils.

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Section: Discussionsupporting

confidence: 52%

Section: Soil and Experimental Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nickel Effects on Growth and Phytolith Yield of Grasses in Contaminated Soils

Silva,

Farnezi,

Santos

et al. 2024

Soil Systems

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“…Also, a lowered Mn concentration was reported in the shoots of Ni-exposed Urochloa mosambicensis , B. decumbens , Chloris ventricose , Astrebla lappacea , and C. ciliaris , as well as lower biomass yield due to Ni toxicity ( Kopittke et al, 2010 ). Nickel accumulation limited the biomass yield of P. maximum , B. brizantha , and B. decumbens ( Silva et al, 2017 ). Furthermore, Ni can disturb the balance between the formation and scavenging of ROS in plant cells ( van der Pas and Ingle, 2019 ), resulting in oxidative stress.…”

Section: Uptake Transport Accumulation and Toxicity Of Trace Elements In Grassesmentioning

confidence: 99%

Are Grasses Really Useful for the Phytoremediation of Potentially Toxic Trace Elements? A Review

et al. 2021

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The pollution of soil, water, and air by potentially toxic trace elements poses risks to environmental and human health. For this reason, many chemical, physical, and biological processes of remediation have been developed to reduce the (available) trace element concentrations in the environment. Among those technologies, phytoremediation is an environmentally friendly in situ and cost-effective approach to remediate sites with low-to-moderate pollution with trace elements. However, not all species have the potential to be used for phytoremediation of trace element-polluted sites due to their morpho-physiological characteristics and low tolerance to toxicity induced by the trace elements. Grasses are prospective candidates due to their high biomass yields, fast growth, adaptations to infertile soils, and successive shoot regrowth after harvest. A large number of studies evaluating the processes related to the uptake, transport, accumulation, and toxicity of trace elements in grasses assessed for phytoremediation have been conducted. The aim of this review is (i) to synthesize the available information on the mechanisms involved in uptake, transport, accumulation, toxicity, and tolerance to trace elements in grasses; (ii) to identify suitable grasses for trace element phytoextraction, phytostabilization, and phytofiltration; (iii) to describe the main strategies used to improve trace element phytoremediation efficiency by grasses; and (iv) to point out the advantages, disadvantages, and perspectives for the use of grasses for phytoremediation of trace element-polluted soils.

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