Nickel mine soil is a potential source for soybean plant growth promoting and heavy metal tolerant rhizobia

Han, Lixin; Cui, Yongliang; Zhou, Jie; Penttinen, Petri; Zeng, Lan; Chen, Qiang; Gu, Yunfu; Zou, Likou; Zhao, Ke; Xiang, Quanju; Yu, Xiumei

doi:10.7717/peerj.13215

Cited by 10 publications

(5 citation statements)

References 53 publications

(68 reference statements)

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“…Some representatives of Rhizobium were resistant to high concentrations of heavy metals. They also had good nitrogen-fixing capacity and thus improved plant growth, allowing them to be used as biofertilizers [63,64].…”

Section: Discussionmentioning

confidence: 99%

Microorganisms for Bioremediation of Soils Contaminated with Heavy Metals

et al. 2023

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Heavy-metal contaminants are one of the most relevant problems of contemporary agriculture. High toxicity and the ability to accumulate in soils and crops pose a serious threat to food security. To solve this problem, it is necessary to accelerate the pace of restoration of disturbed agricultural lands. Bioremediation is an effective treatment for agricultural soil pollution. It relies on the ability of microorganisms to remove pollutants. The purpose of this study is to create a consortium based on microorganisms isolated from technogenic sites for further development in the field of soil restoration in agriculture. In the study, promising strains that can remove heavy metals from experimental media were selected: Pantoea sp., Achromobacter denitrificans, Klebsiella oxytoca, Rhizobium radiobacter, and Pseudomonas fluorescens. On their basis, consortiums were compiled, which were investigated for the ability to remove heavy metals from nutrient media, as well as to produce phytohormones. The most effective was Consortium D, which included Achromobacter denitrificans, Klebsiella oxytoca, and Rhizobium radiobacter in a ratio of 1:1:2, respectively. The ability of this consortium to produce indole-3-acetic acid and indole-3-butyric acid was 18.03 μg/L and 2.02 μg/L, respectively; the absorption capacity for heavy metals from the experimental media was Cd (56.39 mg/L), Hg (58.03 mg/L), As (61.17 mg/L), Pb (91.13 mg/L), and Ni (98.22 mg/L). Consortium D has also been found to be effective in conditions of mixed heavy-metal contamination. Due to the fact that the further use of the consortium will be focused on the soil of agricultural land cleanup, its ability to intensify the process of phytoremediation has been studied. The combined use of Trifolium pratense L. and the developed consortium ensured the removal of about 32% Pb, 15% As, 13% Hg, 31% Ni, and 25% Cd from the soil. Further research will be aimed at developing a biological product to improve the efficiency of remediation of lands withdrawn from agricultural use.

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Section: Discussionmentioning

confidence: 99%

Microorganisms for Bioremediation of Soils Contaminated with Heavy Metals

et al. 2023

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“…Furthermore, heavy metals are important inorganic pollutants in recent years, such as Cu, Ni, Cd, Zn, Cr, and Pb. The studies of symbiosis with these heavy metals are more limited than light metals, mainly focused on Rhizobium and Ensifer species [60][61][62][63][64][65][66][67]. Some studies indicate that the combination of Rhizobium and arbuscular mycorrhizal fungi (AM) induces plant tolerance under As stress [63].…”

Section: Symbiosis Under Abiotic Stress and Its Challengesmentioning

confidence: 99%

“…Some studies indicate that the combination of Rhizobium and arbuscular mycorrhizal fungi (AM) induces plant tolerance under As stress [63]. Others showed that in Ni, Cu, Cr, Cd, and Zn, the symbiont tolerance varies according to the metal type, but the strain alleviates the effect of heavy metals in soybean [64]. Some Rhizobium species can nodulate species of Phaseolus, Trifolium, and Vicia under normal conditions but also can improve the seed germination, biomass, and chlorophyll content in these species under Cd-stress, and their response level depend more on the genotype of the plant associated with these rhizobia.…”

Section: Symbiosis Under Abiotic Stress and Its Challengesmentioning

confidence: 99%

Symbiosis under Abiotic Stress and Its Challenges

Ramírez¹,

Damo²

2023

Symbiosis in Nature

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Many abiotic factors have affected symbiosis effectiveness. However, the responses and interactions vary depending on the plant host, environmental factors, and symbiotic strains. The effect of various environmental factors on the competitiveness of rhizobial strains in host legumes has been examined, but many questions are still unresolved. For example, in the Rhizobia-legume symbiosis, the nitrogen fixation and nodulation processes are strongly related to the physiological state of the host plant. Therefore, a competitive and persistent rhizobial strain is not expected to express its total capacity for nitrogen fixation under limiting factors (e.g., salinity, unfavorable soil pH, nutrient deficiency, mineral toxicity, extreme temperatures, soil moisture problems, and inadequate photoperiods). Moreover, populations of rhizobial species vary in their tolerance to major environmental factors. Furthermore, this chapter emphasizes the studies on symbiosis under abiotic stress and its challenges. Additionally, this can help to understand and establish an effective biological process for improvement in agricultural productivity.

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“…[ 17 ] Rhizobium symbiosis has also been reported to improve the tolerance of alfalfa and soybean to cadmium, lead, zinc, and copper. [ 18 ] However, its role in V uptake and accumulation in legumes is still unclear. In the absence or limitation of molybdenum (Mo), the use of V instead of Mo on the active site of nitrogenase may play a more prominent role in nitrogen fixation.…”

Section: Introductionmentioning

confidence: 99%

Nodulation Signaling Pathway 1 and 2 Modulate Vanadium Accumulation and Tolerance of Legumes

Liu,

Zhang,

Lin

et al. 2024

Advanced Science

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Vanadium (V) pollution potentially threatens human health. Here, it is found that nsp1 and nsp2, Rhizobium symbiosis defective mutants of Medicago truncatula, are sensitive to V. Concentrations of phosphorus (P), iron (Fe), and sulfur (S) with V are negatively correlated in the shoots of wild‐type R108, but not in mutant nsp1 and nsp2 shoots. Mutations in the P transporter PHT1, PHO1, and VPT families, Fe transporter IRT1, and S transporter SULTR1/3/4 family confer varying degrees of V tolerance on plants. Among these gene families, MtPT1, MtZIP6, MtZIP9, and MtSULTR1;1 in R108 roots are significantly inhibited by V stress, while MtPHO1;2, MtVPT2, and MtVPT3 are significantly induced. Overexpression of Arabidopsis thaliana VPT1 or M. truncatula MtVPT3 increases plant V tolerance. However, the response of these genes to V is weakened in nsp1 or nsp2 and influenced by soil microorganisms. Mutations in NSPs reduce rhizobacterial diversity under V stress and simplify the V‐responsive operational taxonomic unit modules in co‐occurrence networks. Furthermore, R108 recruits more beneficial rhizobacteria related to V, P, Fe, and S than does nsp1 or nsp2. Thus, NSPs can modulate the accumulation and tolerance of legumes to V through P, Fe, and S transporters, ion homeostasis, and rhizobacterial community responses.

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Nickel mine soil is a potential source for soybean plant growth promoting and heavy metal tolerant rhizobia

Cited by 10 publications

References 53 publications

Microorganisms for Bioremediation of Soils Contaminated with Heavy Metals

Microorganisms for Bioremediation of Soils Contaminated with Heavy Metals

Symbiosis under Abiotic Stress and Its Challenges

Nodulation Signaling Pathway 1 and 2 Modulate Vanadium Accumulation and Tolerance of Legumes

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