Potential Plant‐Growth‐Promoting and Nitrogen‐Fixing Bacteria Associated with Pioneer Plants Growing on Mine Tailings

Navarro‐Noya, Yendi E.; Martı́nez-Romero, Esperanza; Hernández, César Arranz

doi:10.1002/9781118297674.ch94

Cited by 7 publications

(2 citation statements)

References 54 publications

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“…The generation of phytohormones by PGPR enhances plant growth [34]. PGPR also enhance plant growth through the production of siderophores [35], phosphorus solubilization [36], nitrogen-fixing [37], and lowering ethylene levels in plants through 1-amino-cyclopropane-1-carboxylate (ACC) deaminase, which hydrolyzes ethylene (Figure 1). Plant diseases reduce plant growth and development under both normal conditions and abiotic stress.…”

Section: Classification and Mode Of Action Of Pgprmentioning

confidence: 99%

Plant Growth Promoting Rhizobacteria, Arbuscular Mycorrhizal Fungi and Their Synergistic Interactions to Counteract the Negative Effects of Saline Soil on Agriculture: Key Macromolecules and Mechanisms

Sagar¹,

Rathore

Ramteke³

et al. 2021

Microorganisms

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Soil saltiness is a noteworthy issue as it results in loss of profitability and development of agrarian harvests and decline in soil health. Microorganisms associated with plants contribute to their growth promotion and salinity tolerance by employing a multitude of macromolecules and pathways. Plant growth promoting rhizobacteria (PGPR) have an immediate impact on improving profitability based on higher crop yield. Some PGPR produce 1-aminocyclopropane-1-carboxylic (ACC) deaminase (EC 4.1.99.4), which controls ethylene production by diverting ACC into α-ketobutyrate and ammonia. ACC deaminase enhances germination rate and growth parameters of root and shoot in different harvests with and without salt stress. Arbuscular mycorrhizal fungi (AMF) show a symbiotic relationship with plants, which helps in efficient uptake of mineral nutrients and water by the plants and also provide protection to the plants against pathogens and various abiotic stresses. The dual inoculation of PGPR and AMF enhances nutrient uptake and productivity of several crops compared to a single inoculation in both normal and stressed environments. Positively interacting PGPR + AMF combination is an efficient and cost-effective recipe for improving plant tolerance against salinity stress, which can be an extremely useful approach for sustainable agriculture.

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Section: Classification and Mode Of Action Of Pgprmentioning

confidence: 99%

Plant Growth Promoting Rhizobacteria, Arbuscular Mycorrhizal Fungi and Their Synergistic Interactions to Counteract the Negative Effects of Saline Soil on Agriculture: Key Macromolecules and Mechanisms

Sagar¹,

Rathore

Ramteke³

et al. 2021

Microorganisms

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“…Acidovorax is known to harbour both PGPR and plant pathogenic species [64,65]; Phormidium and Phormidesmis are ubiquitous cyanobacteria found in various environments and sometimes used for plant growth promotion or soil remediation [66][67][68]. Additionally, we observed other beneficial microorganisms associated with specific treatments; e.g., Novihervaspirillum, a common soil genus, was present in the PKA, PD, and C+ treatments [69,70]; Olivibacter, frequently encountered in rhizosphere soil exhibiting PGPR traits [71,72], displayed elevated relative abundance in the PKA, PD, and C+ treatments; Bdellovibrio, a bacterial predator known to house PGPR and biocontrol species [73,74], was detected in the ST and C+ treatments and in lower proportions in PD; and Kocuria, recognised as a PGPR [75], was observed in the ST, PD, and C+ treatments.…”

Section: Discussionmentioning

confidence: 63%

Fertilising Maize with Bio-Based Mineral Fertilisers Gives Similar Growth to Conventional Fertilisers and Does Not Alter Soil Microbiome

Barquero,

Cazador,

Ortiz-Liébana

et al. 2024

Agronomy

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The production of mineral fertilisers relies heavily on mineral deposits that are becoming depleted or is based on processes that are highly energy demanding. In this context, and in line with the circular economy and the European Green Deal, the recovery of nitrogen (N), phosphorus (P), and potassium (K) from organic wastes using chemical technologies is an important strategy to produce secondary raw materials for incorporation into mineral fertilisers, partially replacing the traditional sources of N, P, and K. However, there are very few studies on the agronomic and environmental effects of such substitution. The aim of this work was to evaluate plant growth under microcosm conditions and the effect on the soil microbiome of mineral fertilisers in which part of the N, P, or K content comes from bio-based materials (BBMFs), namely ash, struvite, and a patented chemical process. The crop was maize, and a metataxonomic approach was used to assess the effect on the soil microbiome. The BBMF treatments were compared with a control treated with a conventional mineral fertiliser. The conventional fertiliser performed significantly better than the bio-based fertilisers in terms of maize biomass production at the first sampling point 60 days after sowing (DAS), but at the last sampling point, 90 DAS, the BBMFs showed comparable or even better biomass production than the conventional one. This suggests that BBMFs may have a slightly slower nutrient release rate. The use of fertiliser, whether conventional or BBMF, resulted in a significant increase in microbiome biodiversity (Shannon index), while it did not affect species richness. Interestingly, the use of fertilisers modulated the composition of the bacterial community, increasing the abundance of beneficial bacterial taxa considered to be plant-growth-promoting bacteria, without significant differences between the conventional mineral fertilisers and the BBMFs. The predominance of PGPRs in the rhizosphere of crops when BBMFs are used could be part of the reason why BBMFs perform similarly or even better than conventional fertilisers, even if the rate of nutrient release is slower. This hypothesis will be tested in future field trials. Thus, BBMFs are an interesting option to make the food chain more sustainable.

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A gromyces

Evtushenko¹,

Ariskina²,

Prisyazhnaya³

et al. 2017

Bergey's Manual of Systematics of Archaea and Bacteria

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Ag.ro.my'ces. Gr. n. agros field or soil; N.L. masc. n. myces (from Gr. masc. n. mykes ‐etis ) fungus; N.L. masc. n. Agromyces soil fungus. Actinobacteria / Actinobacteria / Micrococcales / Microbacteriaceae / Agromyces Young cultures usually produce thin ( mostly 0.3–0 . 6 μ m in diameter ) branched vegetative hyphae, short branching filaments, and occasionally form irregular rods that subsequently break up into diphtheroid, rod like to coccoid elements . Scant aerial hyphae occur on rare occasions. Nonmotile. Nonsporeforming. Gram‐stain‐positive type of cell wall. Non‐acid fast. Lysozyme sensitive. Colonies are generally yellow or white , circular, 1–2 mm in diameter, opaque, often penetrating into the agar. Chemo‐organotrophs , having a respiratory type of metabolism. Aerobic to microaerophilic . Catalase and oxidase test reactions intensities vary among species. Most strains grow well on standard laboratory media and use a wide range of organic compounds as sole sources of carbon for growth and energy. Some species are nutritionally exacting. Mesophilic; optimal growth at ∼24–30°C; growth range ∼7–40°C, some species show weak growth at 1–5°C. Grow optimally at near neutral or slightly alkaline pH, some can grow at initial pH values up to pH 12. Generally nonhalophilic, some species prefer low salt concentrations. The cell‐wall peptidoglycan is a group B type, based on 2,4‐diaminobutyric acid ( l ‐isomer predominating). Menaquinones are the sole respiratory quinones; the predominant component is typically an unsaturated menaquinone with 12 isoprene units ( MK‐12 ); the next most common components are MK‐11 and MK‐13. Major cellular fatty acids are C 15:0 anteiso, C 17:0 anteiso, and C 16:0 iso Mycolic acids are absent. Principal polar lipids are diphosphatidylglycerol, phosphatidylglycerol, and characteristic glycolipids. The usual natural habitat is soil; occur in other diverse terristrial and aquatic environments and in microbial assemblages associated with plants, animals, and humans. Isolation from unequivocally pathological materials is uncommon; a single case of bacteremia associated with Agromyces mediolanus is reported. DNA G + C content ( mol% ): 65 ( T m )–73 (HPLC). Type species : Agromyces ramosus Gledhill and Casida 1969, 346 AL .

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Potential Plant‐Growth‐Promoting and Nitrogen‐Fixing Bacteria Associated with Pioneer Plants Growing on Mine Tailings

Cited by 7 publications

References 54 publications

Plant Growth Promoting Rhizobacteria, Arbuscular Mycorrhizal Fungi and Their Synergistic Interactions to Counteract the Negative Effects of Saline Soil on Agriculture: Key Macromolecules and Mechanisms

Plant Growth Promoting Rhizobacteria, Arbuscular Mycorrhizal Fungi and Their Synergistic Interactions to Counteract the Negative Effects of Saline Soil on Agriculture: Key Macromolecules and Mechanisms

Fertilising Maize with Bio-Based Mineral Fertilisers Gives Similar Growth to Conventional Fertilisers and Does Not Alter Soil Microbiome

A gromyces

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