Indole-3-Acetic Acid and 1-Aminocyclopropane-1-Carboxylate Deaminase: Bacterial Traits Required in Rhizosphere, Rhizoplane and/or Endophytic Competence by Beneficial Bacteria

Etesami, Hassan; Alikhani, Hossein Ali; Hosseini, Hossein Mirseyed

doi:10.1007/978-3-319-24654-3_8

Cited by 74 publications

(41 citation statements)

References 439 publications

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“…It has been reported that 80% of microorganisms isolated from rhizosphere of different plants had the ability to produce IAA as secondary metabolites [ 51 ]. Since IAA is a plant hormone that has no specific role in bacterial cells, it can be assumed that IAA production can improve the ability of these isolates to interact with plants [ 52 , 53 ]. Previous studies have reported the role of this hormone in helping bacteria to become plant endophytes [ 54 ].…”

Section: Discussionmentioning

confidence: 99%

Characterization of rhizosphere and endophytic bacteria from roots of maize (Zea mays L.) plant irrigated with wastewater with biotechnological potential in agriculture

Abedinzadeh

Etesami

Alikhani

2019

Biotechnology Reports

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Section: Discussionmentioning

confidence: 99%

Characterization of rhizosphere and endophytic bacteria from roots of maize (Zea mays L.) plant irrigated with wastewater with biotechnological potential in agriculture

Abedinzadeh

Etesami

Alikhani

2019

Biotechnology Reports

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“…Growth regulators like ethylene and IAA are known to regulate various stages of plant growth commencing at seed germination, aiding processes of tissue differentiation finally culminating into leaf senescence . Thus, the production of ACC deaminase and IAA by root colonizers impart better growth of plants .…”

Section: Discussionmentioning

confidence: 99%

Population densities of indigenous Acidobacteria change in the presence of plant growth promoting rhizobacteria (PGPR) in rhizosphere

et al. 2017

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Rhizosphere microbial community has diverse metabolic capabilities and plays a crucial role in maintaining plant health. Oligotrophic plant growth promoting rhizobacteria (PGPR), along with difficult-to-culture microbial fractions, might be involved synergistically in microbe-microbe and plant-microbe interactions in the rhizosphere. Among the difficult-to-culture microbial fractions, Acidobacteria constitutes the most dominant phylum thriving in rhizospheric soils. We selected effective PGPR for tomato and black gram and studied their effect on population densities of acidobacterial members. Three facultatively oligotrophic PGPR were identified through 16S rRNA gene sequencing as Sphingobacterium sp. (P3), Variovorax sp. (P4), and Roseomonas sp. (A2); the latter being a new report of PGPR. In presence of selected PGPR strains, the changes in population densities of Acidobacteria were monitored in metagenomic DNA extracted from bulk and rhizospheric soils of tomato and black gram using real time qPCR. A gradual increase in equivalent cell numbers of Acidobacteria members was observed over time along with a simultaneous increase in plant growth promotion by test PGPR. We report characterization of three effective PGPR strains and their effects on indigenous, underexplored difficult-to-culture phylum-Acidobacteria. We suggest that putative interactions between these two bacterial groups thriving in rhizospheric soils could be beneficial for plant growth.

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“…In addition, it is known that the release of organic acids from the plant roots can be effective in enhancing mobilization of mineral K (Wang et al, 2000). Therefore, it can be suggested that other PGPRs (e.g., IAA-producing bacteria) can also have a role in providing K for plant by increasing root exudates ( Figure 2) (Etesami et al, 2015). In general, the most important mechanisms known in K mineral solubilization by KSB are "(i) by lowering the pH;…”

Section: Action Mechanisms Of Ksb In Solubilizing Kmentioning

confidence: 99%

Potassium solubilizing bacteria (KSB):: Mechanisms, promotion of plant growth, and future prospects A review

Etesami

Emami

Alikhani

2017

J. Soil Sci. Plant Nutr.

370

141

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Potassium (K) is considered as an essential nutrient and a major constituent within all living cells. Naturally, soils contain K in larger amounts than any other nutrients; however most of the K is unavailable for plant uptake. Application of chemical fertilizers has a considerably negative impact on environmental sustainability. It is known that potassium solubilizing bacteria (KSB) can solubilize K-bearing minerals and convert the insoluble K to soluble forms of K available to plant uptake. Many bacteria such as Acidothiobacillus ferrooxidans, Paenibacillus spp., Bacillus mucilaginosus, B. edaphicus, and B. circulans have capacity to solubilize K minerals (e.g., biotite, feldspar, illite, muscovite, orthoclase, and mica). KSB are usually present in all soils, although their number, diversity and ability for K solubilization vary depending upon the soil and climatic conditions. KSB can dissolve silicate minerals and release K through the production of organic and inorganic acids, acidolysis, polysaccharides, complexolysis, chelation, and exchange reactions. Hence, the production and management of biological fertilizers containing KSB can be an effective alternative to chemical fertilizers. This article presents an overview of current trends and challenges on KSB, mechanisms and their role in plant growth promotion, and eventually gives some perspectives for research on K in agriculture.Keywords: Bio-fertilizer, potassium bearing minerals; potassium solubilization, plant and bacteria interactions, PGPRs 898Etesami et al

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Indole-3-Acetic Acid and 1-Aminocyclopropane-1-Carboxylate Deaminase: Bacterial Traits Required in Rhizosphere, Rhizoplane and/or Endophytic Competence by Beneficial Bacteria

Cited by 74 publications

References 439 publications

Characterization of rhizosphere and endophytic bacteria from roots of maize (Zea mays L.) plant irrigated with wastewater with biotechnological potential in agriculture

Characterization of rhizosphere and endophytic bacteria from roots of maize (Zea mays L.) plant irrigated with wastewater with biotechnological potential in agriculture

Population densities of indigenous Acidobacteria change in the presence of plant growth promoting rhizobacteria (PGPR) in rhizosphere

Potassium solubilizing bacteria (KSB):: Mechanisms, promotion of plant growth, and future prospects A review

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Indole-3-Acetic Acid and 1-Aminocyclopropane-1-Carboxylate Deaminase: Bacterial Traits Required in Rhizosphere, Rhizoplane and/or Endophytic Competence by Beneficial Bacteria

Cited by 74 publications

References 439 publications

Characterization of rhizosphere and endophytic bacteria from roots of maize (Zea mays L.) plant irrigated with wastewater with biotechnological potential in agriculture

Characterization of rhizosphere and endophytic bacteria from roots of maize (Zea mays L.) plant irrigated with wastewater with biotechnological potential in agriculture

Population densities of indigenous Acidobacteria change in the presence of plant growth promoting rhizobacteria (PGPR) in rhizosphere

Potassium solubilizing bacteria (KSB):: Mechanisms, promotion of plant growth, and future prospects ­ A review

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Potassium solubilizing bacteria (KSB):: Mechanisms, promotion of plant growth, and future prospects A review