Two plant growth promoting bacterial Bacillus strains possess different mechanisms in adsorption and resistance to cadmium

Chi, Yaowei; Huang, Yueyuan; Wang, Juncai; Chen, Xunfeng; Chu, Shaoli; Hayat, Kashif; Xu, Zheng; Xu, Hong; Zhou, Pei; Zhang, Dan

doi:10.1016/j.scitotenv.2020.140422

Cited by 56 publications

(28 citation statements)

References 46 publications

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“…The initial Cd 2+ from 0 to 30 mg L À1 was performed at optimum conditions of pH 7.0 and 30 C. The effect of contact time was set to 0 h, 5 min, 10 min, 15 min, 30 min, 1 h and 3 h at 1.0 mg L À1 Cd 2+ with optimum conditions of pH 7.0 and 30 C. Aer biosorption, the cell suspensions were centrifuged at 8000 rpm for 5 min and the supernatant was collected for Cd 2+ concentration determination by inductively coupled plasma-optical emission spectrometry (ICP-OES; Optima 5300 DV, PerkinElmer, USA). The biosorption efficiency of Cd 2+ was calculated using the following formula: 12 Adsorption efficiency (%)…”

Section: Batch Biosorption Experimentsmentioning

confidence: 99%

“…40 At pH >7.0, metal ions may precipitate from alkaline solutions, leading to a decrease in the adsorption efficiency. 12 3.4.2 Effect of temperature. In this study, the optimum adsorption temperature was determined by setting the range at 20-40 C. As shown in Fig.…”

Section: Content Changes Of Eps Before and Aer CD 2+ Adsorptionmentioning

confidence: 99%

“…The process of active adsorption is much slower and metabolism-dependent. 5,12 However, most adsorption mechanisms are currently unclear. In addition, most related studies have focused on the adsorption behavior and removal efficiency of metal ions, while tolerance and biosorption mechanisms by Synechocystis sp.…”

Section: Introductionmentioning

confidence: 99%

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Biosorption behavior and mechanism of cadmium from aqueous solutions by Synechocystis sp. PCC6803

et al. 2021

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Section: Batch Biosorption Experimentsmentioning

confidence: 99%

Section: Content Changes Of Eps Before and Aer CD 2+ Adsorptionmentioning

confidence: 99%

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Biosorption behavior and mechanism of cadmium from aqueous solutions by Synechocystis sp. PCC6803

et al. 2021

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“…For instance, in Volvariella volvacea, Cd stress induces selective overexpression of genes encoding metallothioneins (MTs) and heat shock proteins (HSPs), along with genes involved in oxidative stress responses [7]. Cd resistance in Bacillus megaterium NCT-2 and Bacillus paranthracis NT1 may be regulated by the genes, like cada, zitB, khtT, bshA, trkA, czcD and abshA [10]. Additionally, some proteins related to DNA synthesis and repair, including ribosomal proteins, phosphoglycerate kinase, and inorganic pyrophosphatase were reportedly up-regulated by Cd stress [11].…”

Section: Introductionmentioning

confidence: 99%

Transcriptome Analysis and Expression Profiling of Molecular Responses to Cd Toxicity in Morchella spongiola

Xie

Jiang

et al. 2021

Mycobiology

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Morchella is a genus of fungi with the ability to concentrate Cd both in the fruit-body and mycelium. However, the molecular mechanisms conferring resistance to Cd stress in Morchella are unknown. Here, RNA-based transcriptomic sequencing was used to identify the genes and pathways involved in Cd tolerance in Morchella spongiola. 7444 differentially expressed genes (DEGs) were identified by cultivating M. spongiola in media containing 0.15, 0.90, or 1.50 mg/L Cd 2þ . The DEGs were divided into six sub-clusters based on their global expression profiles. GO enrichment analysis indicated that numerous DEGs were associated with catalytic activity, cell cycle control, and the ribosome. KEGG enrichment analysis showed that the main pathways under Cd stress were MAPK signaling, oxidative phosphorylation, pyruvate metabolism, and propanoate metabolism. In addition, several DEGs encoding ion transporters, enzymatic/non-enzymatic antioxidants, and transcription factors were identified. Based on these results, a preliminary gene regulatory network was firstly proposed to illustrate the molecular mechanisms of Cd detoxification in M. spongiola. These results provide valuable insights into the Cd tolerance mechanism of M. spongiola and constitute a robust foundation for further studies on detoxification mechanisms in macrofungi that could potentially lead to the development of new and improved fungal bioremediation strategies.

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“…Due to the fact that biostimulation, bio fertilization, biocontrol and sometimes by biosorption are multitask phenomenon and in this scenario, bacteria of a group of PGPR impart tolerance to biotic and abiotic stresses including heavy metals. Cadmium (Chi et al, 2020;Wang et al, 2020), Klebsiella pneumoniae and Citrobacter freundii for lead exhibited their potential in promoting the plant growth in heavy metals contaminated soil (Al-Garni, 2005). Soil can be contaminated by many polluting sources, such as composts, pesticides, emissions from municipal waste sites, metal smelting industry, etc.…”

Section: Introductionmentioning

confidence: 99%

Root- Nodulating Ensifer Adhaerens Ks23 of Pisum Sativum L. In Optimisation of Cadmium Biosorption Using Rsm Based Approach

Katiyar

Kumar

Dubey

et al. 2021

Preprint

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The Cadmium tolerance by root nodulating bacteria Ensifer adhaerens KS23 inhabiting in Pisum sativum L. var. Arkel revealed linear relationship with inorganic salt cadmium sulphate (CdSO4) upto 200 μg/ml, corresponding to growth and survival in solid as well as liquid Yeast Extract Mannitol (YEM) medium with LC50 value of 107.2 μg/ml and LC95 of 184.5 μg/ml. The results of phylogenetic and morpho-physiological analysis exhibited the genus E. adhaerens. KS23 was found to be the most promising among all the 20 isolates. The increase in Glutathione S-transferase (GST) activity by KS23 was 9.7 fold under Cd stress. Wherein, P and F values were <0.05 and 26.54 respectively and predicted r2 value of 0.8192 and adjusted r2 value 0.8908 were reasonable (i.e. <0.2) of the Box Behnken design. The data showed that 81.24% cadmium bio-removal achieved at pH 6.0, 30°C and 168 h of incubation while supplementing the YEM medium with 25 μg/ml cadmium. Further, its effect on plant growth and development exhibited due to production of IAA, secretion of siderophores, phosphate solubilisation and 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity by E. adhaerens KS23. In addition to inherent PGP attributes, Cd tolerant E. adhaerens KS23 played dual role of biosorption of cadmium and upsurge in growth promotion of P. sativum which may provide a new root-nodulating bacterium inhabiting in P. sativum cultivated at high altitudes of Himalayan region.

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Two plant growth promoting bacterial Bacillus strains possess different mechanisms in adsorption and resistance to cadmium

Cited by 56 publications

References 46 publications

Biosorption behavior and mechanism of cadmium from aqueous solutions by Synechocystis sp. PCC6803

Biosorption behavior and mechanism of cadmium from aqueous solutions by Synechocystis sp. PCC6803

Transcriptome Analysis and Expression Profiling of Molecular Responses to Cd Toxicity in Morchella spongiola

Root- Nodulating Ensifer Adhaerens Ks23 of Pisum Sativum L. In Optimisation of Cadmium Biosorption Using Rsm Based Approach

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