Bacterial Siderophore as a Plant Growth Promoter

Pahari, Avishek; Pradhan, Amit Kumar; Nayak, Suraja Kumar; Mishra, Bibhuti Bhusan

doi:10.1007/978-981-10-6847-8_7

Cited by 48 publications

(26 citation statements)

References 90 publications

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“…The ability to produce different kinds of siderophores is widely distributed among plant growth-promoting microorganisms ( Scavino and Pedraza, 2013 ; Pahari et al, 2017 ). In addition to the positive effect on plant growth by increasing Fe availability for the plant, siderophores can also inhibit the proliferation of various phytopathogens by competition for iron ( Solanki et al, 2014 ; Pahari et al, 2017 ). Genes responsible for the synthesis and uptake of siderophores could be found in the genome of strain 169 ( Supplementary Table 1 ).…”

Section: Resultsmentioning

confidence: 99%

Genomic Analysis of the Endophytic Stenotrophomonas Strain 169 Reveals Features Related to Plant-Growth Promotion and Stress Tolerance

et al. 2021

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Plant-associated Stenotrophomonas isolates have great potential for plant growth promotion, especially under stress conditions, due to their ability to promote tolerance to abiotic stresses such as salinity or drought. The endophytic strain Stenotrophomonas sp. 169, isolated from a field-grown poplar, increased the growth of inoculated in vitro plants, with a particular effect on root development, and was able to stimulate the rooting of poplar cuttings in the greenhouse. The strain produced high amounts of the plant growth-stimulating hormone auxin under in vitro conditions. The comparison of the 16S rRNA gene sequences and the phylogenetic analysis of the core genomes showed a close relationship to Stenotrophomonas chelatiphaga and a clear separation from Stenotrophomonas maltophilia. Whole genome sequence analysis revealed functional genes potentially associated with attachment and plant colonization, growth promotion, and stress protection. In detail, an extensive set of genes for twitching motility, chemotaxis, flagella biosynthesis, and the ability to form biofilms, which are connected with host plant colonization, could be identified in the genome of strain 169. The production of indole-3-acetic acid and the presence of genes for auxin biosynthesis pathways and the spermidine pathway could explain the ability to promote plant growth. Furthermore, the genome contained genes encoding for features related to the production of different osmoprotective molecules and enzymes mediating the regulation of stress tolerance and the ability of bacteria to quickly adapt to changing environments. Overall, the results of physiological tests and genome analysis demonstrated the capability of endophytic strain 169 to promote plant growth. In contrast to related species, strain 169 can be considered non-pathogenic and suitable for biotechnology applications.

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Section: Resultsmentioning

confidence: 99%

Genomic Analysis of the Endophytic Stenotrophomonas Strain 169 Reveals Features Related to Plant-Growth Promotion and Stress Tolerance

et al. 2021

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“…We also reported that 28.75% of the isolates synthetized siderophores. The roles of these compounds in plant growth promotion are well-known either by providing a supplementary source of iron to the plant, by competing with phytopathogen for iron or by stimulating the plant defenses (Aznar and Dellagi, 2015;Crowley, 2006;Pahari et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Identification and characterization of Vietnamese coffee bacterial endophytes displaying in vitro antifungal and nematicidal activities

Duong

Nguyen²,

Phan³

et al. 2021

Microbiological Research

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The endophytic bacteria were isolated from coffee roots and seeds in Vietnam and identified with 16S rDNA sequencing as belonging to the Actinobacteria, Firmicutes and Proteobacteria phyla with the Nocardia, Bacillus and Burkholderia as dominant genera, respectively. Out of the thirty genera recovered from Coffea canephora and Coffea liberica, twelve were reported for the first time in endophytic association with coffee including members of the genera Brachybacterium, Caballeronia, Kitasatospora, Lechevalieria, Leifsonia, Luteibacter, Lysinibacillus, Mycolicibacterium, Nakamurella, Paracoccus, Sinomonas and Sphingobium. A total of eighty bacterial endophytes were characterized in vitro for several plant growth promoting and biocontrol traits including: the phosphate solubilization, the indolic compounds, siderophores, HCN, esterase, lipase, gelatinase and chitinase production. A subset of fifty selected bacteria were tested for their potential as biocontrol agents with in vitro confrontations with the fungal pathogen Fusarium oxysporum as well as the coffee parasitic nematodes Radopholus duriophilus and Pratylenchus coffeae. The three most efficient isolates on F. oxysporum belonging to the Bacillus, Burkholderia, and Streptomyces genera displayed a growth inhibition rate higher than 40%. Finally, five isolates from the Bacillus genus were able to lead to 100% of mortality in 24 h on both R. duriophilus and P. coffeae.

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“…In terms of site competition, siderophores are low molecular weight ferric ion specific chelating agents that can be differentiated into three main categories, hydroxamates, catecholates, and carboxylates. As described by Pahari et al (2017), hydroxymate type of siderophore is mostly produced by the bacteria and fungi. The catecholate siderophore, produced by the bacteria and carboxylate siderophore produced by bacteria like Rhizobium sp., Staphylococcus sp.…”

Section: Siderophore Production As Antagonistmentioning

confidence: 99%

Untitled

2021

JTAS

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The agricultural industry worldwide faces challenges in the struggle against plant diseases. In efforts to increase agricultural intensities, the dependency on agrochemicals for crop protection has become significantly high. Moreover, the increasing use of agrochemicalbased products has resulted in multidrug-resistant pathogens and environmental pollution. This paper reviews the biocontrol capacity of plant growth-promoting microorganisms (PGPMs) originating from plants towards plant pathogens. The current trend in discovering new compounds has shown antimicrobial activity gaining immense interest due to its vast potential. On a related note, PGPMs are an aspect of that research interest that can be further explored as antimicrobial producers. In this work, the types of biocontrol mechanisms pertaining to PGPMs as well as their roles in biocontrol activity were covered. A biocontrol approach exploits disease-suppressive microorganisms to improve plant health by controlling related pathogens. The understanding of these microorganisms and mechanisms of pathogen antagonismare primary factors in ensuring improvement for future applications. Inevitably, there is indeed room for rigorous expansion with respect to PGPMs in the future of agriculture.

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Bacterial Siderophore as a Plant Growth Promoter

Cited by 48 publications

References 90 publications

Genomic Analysis of the Endophytic Stenotrophomonas Strain 169 Reveals Features Related to Plant-Growth Promotion and Stress Tolerance

Genomic Analysis of the Endophytic Stenotrophomonas Strain 169 Reveals Features Related to Plant-Growth Promotion and Stress Tolerance

Identification and characterization of Vietnamese coffee bacterial endophytes displaying in vitro antifungal and nematicidal activities

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