Isolation of cadmium-resistance and siderophore-producing endophytic bacteria and their potential use for soil cadmium remediation

Li, Yanglong; Wei, Shumeng; Chen, Xiangteng; Dong, Yuan; Zeng, Mansheng; Yan, Chaowu; Hou, Lingyu; Jiao, Ruzhen

doi:10.1016/j.heliyon.2023.e17661

Cited by 3 publications

(2 citation statements)

References 59 publications

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“…Phosphate-solubilizing bacteria (PSB) have been found to enhance plant growth in Cdcontaminated soils by providing phosphorus (P), making them useful for the remediation of Cd. Despite being a crucial component for plant development, soil seldom contains enough P. Both organic (Po, average 50%) and inorganic (Pi, average 50%) forms of P are found in nature [205,206]. Roots can absorb them because none are soluble (typically no more than 5%) [207].…”

Section: Phosphate Solubilizationmentioning

confidence: 99%

Recent Advances in Microbial-Assisted Remediation of Cadmium-Contaminated Soil

Zulfiqar,

Haider,

Maqsood

et al. 2023

Plants

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Soil contamination with cadmium (Cd) is a severe concern for the developing world due to its non-biodegradability and significant potential to damage the ecosystem and associated services. Industries such as mining, manufacturing, building, etc., rapidly produce a substantial amount of Cd, posing environmental risks. Cd toxicity in crop plants decreases nutrient and water uptake and translocation, increases oxidative damage, interferes with plant metabolism and inhibits plant morphology and physiology. However, various conventional physicochemical approaches are available to remove Cd from the soil, including chemical reduction, immobilization, stabilization and electro-remediation. Nevertheless, these processes are costly and unfriendly to the environment because they require much energy, skilled labor and hazardous chemicals. In contrasting, contaminated soils can be restored by using bioremediation techniques, which use plants alone and in association with different beneficial microbes as cutting-edge approaches. This review covers the bioremediation of soils contaminated with Cd in various new ways. The bioremediation capability of bacteria and fungi alone and in combination with plants are studied and analyzed. Microbes, including bacteria, fungi and algae, are reported to have a high tolerance for metals, having a 98% bioremediation capability. The internal structure of microorganisms, their cell surface characteristics and the surrounding environmental circumstances are all discussed concerning how microbes detoxify metals. Moreover, issues affecting the effectiveness of bioremediation are explored, along with potential difficulties, solutions and prospects.

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Section: Phosphate Solubilizationmentioning

confidence: 99%

Recent Advances in Microbial-Assisted Remediation of Cadmium-Contaminated Soil

Zulfiqar,

Haider,

Maqsood

et al. 2023

Plants

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“…Endophyte bacteria communities mostly live in the soils near plant roots or interior tissue of roots (Tara et al, 2019a), supporting plant growth and creating conditions for plants to survive in the toxic contaminated media (Ijaz et al, 2016). The inoculant of endophyte bacteria increases nutrient uptake for plant growth and biomass (Li et al, 2023), reduces the plant stresses (Nanda et al, 2019), controls metal resistance mechanisms, and either encourages or inhibits the accumulation of heavy metals in plants by phytoextraction and phytostabilization (Begum et al, 2018;Fan et al, 2018). However, the endophyte bacterial communities are influenced by the host plant species, type of soils, and environmental conditions (Ding & Melcher, 2016).…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Endophytes Bacteria in Enhancing Floating Treatment Wetland to Treat Textile Wastewater

Fajri,

Nurmiyanto,

Sa`adah

et al. 2024

J. Ecol. Eng.

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This research investigated the association of consortium endophyte bacteria from different hosts to enhance the performance of Vetiveria zizanioides in treating textile wastewater using Floating Treatment Wetlands (FTWs). The endophyte bacteria were isolated from the roots of three natural plants (Oryza sativa, Colocasia esculenta, and Alternanthera philoxeroides) contaminated by textile wastewater. The selected isolated endophyte bacteria were subjected to the four FTWs reactors containing the Vetiveria sp. and ran for 30 days in a semi-batch system to evaluate their performance. FTWs reactors-augmented endophyte bacteria could reduce the COD, color, and heavy metals in textile wastewater. The highest removal efficiencies of COD (74%) and color (91%) were observed in FK2 (vegetated control) and F4 reactor, respectively. The addition of endophyte bacteria increased the heavy metal reductions of Pb (52%) and Cd (33%) in reactors of F3 and F4, respectively. This study exhibited that the consortium endophyte bacteria isolated from the contaminated plants could improve the FTWs reactor performance. Finally, they reduce the plant stresses in the contaminated wastewater by increasing the plant biomass in roots and shoots. These findings reveal that the consortium of natural endophyte bacteria from different hosts does not inhibit their function and association with the other host plant, but they contribute positive responses to the plant growth and pollutant degradation.

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