Field Studies on the Effect of Bioaugmentation with Bacillus amyloliquefaciens FZB42 on Plant Accumulation of Rare Earth Elements and Selected Trace Elements

Okoroafor, Precious Uchenna; Ikwuka, God’sfavour; Zaffar, Nazia; Epede, Melvice Ngalle; Mensah, Martin Kofi; Haupt, Johann; Golde, Andreas; Heilmeier, Hermann; Wiche, Oliver

doi:10.3390/min12040409

Cited by 5 publications

(2 citation statements)

References 75 publications

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“…Besides Okoroafor et al [151], after applying B. velezensis FZB42 (formerly B. amyloliquefaciens FZB4) in maize and common sunflower cultivations, detected over 20% increase in biomass production in each of the crops. Moreover, inoculation with the tested preparation increased the bioavailability of soil elements.…”

Section: Promoting Plant Growth By the Bacteria Of The Genus Bacillus...mentioning

confidence: 94%

Taxonomy, Ecology, and Cellulolytic Properties of the Genus Bacillus and Related Genera

Dobrzyński,

Wróbel,

Górska

2023

Agriculture

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Bacteria of the genus Bacillus and related genera (e.g., Paenibacillus, Alicyclobacillus or Brevibacillus) belong to the phylum Firmicutes. Taxonomically, it is a diverse group of bacteria that, to date, has not been well described phylogenetically. The group consists of aerobic and relatively anaerobic bacteria, capable of spore-forming. Bacillus spp. and related genera are widely distributed in the environment, with a particular role in soil. Their abundance in the agricultural environment depends mainly on fertilization, but can also depend on soil cultivated methods, meaning whether the plants are grown in monoculture or rotation systems. The highest abundance of the phylum Firmicutes is usually recorded in soil fertilized with manure. Due to the great abundance of cellulose in the environment, one of the most important physiological groups among these spore-forming bacteria are cellulolytic bacteria. Three key cellulases produced by Bacillus spp. and related genera are required for complete cellulose degradation and include endoglucanases, exoglucanases, and β-glucosidases. Due to probable independent evolution, cellulases are encoded by hundreds of genes, which results in a large structural diversity of these enzymes. The microbial degradation of cellulose depends on its type and environmental conditions such as pH, temperature, and various substances including metal ions. In addition, Bacillus spp. are among a few bacteria capable of producing multi-enzymatic protein complexes called cellulosomes. In conclusion, the taxonomy of Bacillus spp. and related bacteria needs to be reorganized based on, among other things, additional genetic markers. Also, the ecology of soil bacteria of the genus Bacillus requires additions, especially in the identification of physical and chemical parameters affecting the occurrence of the group of bacteria. Finally, it is worth adding that despite many spore-forming strains well-studied for cellulolytic activity, still few are used in industry, for instance for biodegradation or bioconversion of lignocellulosic waste into biogas or biofuel. Therefore, research aimed at optimizing the cellulolytic properties of spore-forming bacteria is needed for more efficient commercialization.

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Section: Promoting Plant Growth By the Bacteria Of The Genus Bacillus...mentioning

confidence: 94%

Taxonomy, Ecology, and Cellulolytic Properties of the Genus Bacillus and Related Genera

Dobrzyński,

Wróbel,

Górska

2023

Agriculture

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“…In this study, we found highly competitive capacities between J. curcas and M. esculenta in bioaccumulating more soil PTEs than V. unguiculata plants. This might be driven by a common transport mechanism in taking up soil Cd, Pb and Hg in both plants owing to similarities in both plants' physiology (same family Euphobiaceace) [24,27].…”

Section: Influence Of Soil and Plant Characteristics On Trace Element...mentioning

confidence: 99%

J. curcas and Manihot esculenta are potential super plants for phytoremediation in multi-contaminated mine spoils

Mensah

Drebenstedt²,

Okoroafor³

et al. 2022

MATEC Web Conf.

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Phytoremediation approaches have increasingly been applied in environmental remediation projects. In this study, the potentials of Manihot esculenta (M. esculenta), Vigna unguiculata (V. unguiculata) and J. curcas curcas (J. curcas) in remediating multi-contaminated mine spoils was evaluated. The target potentially toxic elements (PTEs) are Cd, As, Zn, Pb, and Hg. The test plants were grown and monitored under growth stress conditions for 270 days. Using inductively Coupled Plasma- Mass Spectrometry and EPA method 200.8, the total elemental contents in the shoot and root parts of the plants were determined. Significant differences (p< 0.01) were observed in the uptake performance of the test plants. For example, M. esculenta and J. curcas, bioaccumulated 50- 80 % of the various baseline PTE contents in their root parts at 270 days after planting. In contrast, < 27 % of PTEs were found in the root parts of V. unguiculata, except Zn at 70 %. Growth stressors and soil PTEs were factors that reduced biomass production in respective plants by 25 %. Cummulatively, the performance order M. esculenta> J. curcas> V. unguiculata was observed for multi-contaminant removal in soils. Techniques for enhancing the easy cultivation of the test plants are recommended to enhance their applicabilities in phytoremediation projects.

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Immobilization effects of co-pyrolyzed neem seed mixed with poultry manure on potentially toxic elements in soil and the phytoremediation potentials of native Manihot esculenta and Jatropha curcas in ensuring sustainable land use

Mensah

Drebenstedt

Ola

et al. 2023

Environ Monit Assess

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This study evaluated the effects of neem seed biochar, poultry manure, and their combinations at varying rates of 15 and 25% (w/w) on potentially toxic elements (PTEs) in soils. Afterward, the suitability of Manihot esculenta and Jatropha curcas in removing Cd, As, Zn, Pb, and Hg from mine spoils were appraised in a 270-day outdoor pot experiment. Using ICP–Mass Spectrometry, the elemental contents of target PTE in the shoot, root, and soil specimens were determined for each treatment. The obtained average values were further subjected to a nonparametric test of samples using IBM SPSS Statistic 29. The applied organic amendments resulted in significant differences p < 0.05 in PTE availability for plant uptake after the Independent-Samples Kruskal–Wallis Test was made. Nonetheless, applying a 25% (w/w) mixture of neem seed biochar and poultry manure was efficient in immobilizing more PTEs in soils which caused lower PTEs presence in plants. Organic amendments further significantly enhanced the fertility of the mine soils leading to about a 6– 25.00% increase in the biomass yield (p < 0.05) of both plants. No significant difference (p > 0.05) was however observed between the phytoremediation potentials of both plants after the Independent-Sample Mann–Whitney U test. Even that, Manihot esculenta was averagely more efficient in PTE uptake than Jatropha curcas. Larger portions of the bioaccumulated PTEs were stored in the roots of both plants leading to high bioconcentration factors of 1.94– 2.47 mg/kg and 1.27– 4.70 mg/kg, respectively, for Jatropha curcas and Manihot esculenta. A transfer factor < 1 was achieved for all PTEs uptake by both plants and indicated their suitability for phytostabilization. Techniques for easy cultivation of root-storing PTEs are required to enhance their large-scale use as their biomass could further be used in clean energy production.

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Field Studies on the Effect of Bioaugmentation with Bacillus amyloliquefaciens FZB42 on Plant Accumulation of Rare Earth Elements and Selected Trace Elements

Cited by 5 publications

References 75 publications

Taxonomy, Ecology, and Cellulolytic Properties of the Genus Bacillus and Related Genera

Taxonomy, Ecology, and Cellulolytic Properties of the Genus Bacillus and Related Genera

J. curcas and Manihot esculenta are potential super plants for phytoremediation in multi-contaminated mine spoils

Immobilization effects of co-pyrolyzed neem seed mixed with poultry manure on potentially toxic elements in soil and the phytoremediation potentials of native Manihot esculenta and Jatropha curcas in ensuring sustainable land use

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