Bioremediation of heavy metal–polluted environments by non-living cells from rhizobial isolates

Moretto, Cristiane; Castellane, Tereza Cristina Luque; Leonel, Tatiane Fernanda; Campanharo, João Carlos; Lemos, Eliana Gertrudes de Macedo

doi:10.1007/s11356-022-18844-5

Cited by 8 publications

(3 citation statements)

References 59 publications

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“…In some cases, Al toxicity happens because the Al is immobilized in humic chelates, such as in Histosols. In Mn, toxicity is more common in acid soil, where temporary or local anoxia results from wetness, high organic matter, impeding layers, or well-drained soils such as Oxisols [3,8,[60][61][62].…”

Section: Symbiosis Under Abiotic Stress and Its Challengesmentioning

confidence: 99%

“…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%

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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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Section: Symbiosis Under Abiotic Stress and Its Challengesmentioning

confidence: 99%

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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“…Rhizobium symbiosis can not only fix nitrogen, but can also regulate the tolerance and accumulation of heavy metals in legumes. [16] Liu et al showed that Rhizobium symbiosis could significantly improve arsenic (As) tolerance of Medicago truncatula and reduce the accumulation of As in shoots. [17] Rhizobium symbiosis has also been reported to improve the tolerance of alfalfa and soybean to cadmium, lead, zinc, and copper.…”

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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