Efficacy of Facultative Oligotrophic Bacterial Strains as Plant Growth-Promoting Rhizobacteria (PGPR) and their Potency Against Two Pathogenic Fungi Causing Damping-off Diseases

Abdelaziz, Sayed; Hemeda, Nada F.; Belal, Eman E.; El-Shahawy, R.

doi:10.4172/2471-9315.1000153

Cited by 5 publications

(4 citation statements)

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“…The type species Stenotrophomonas maltophilia is a multidrug resistant ubiquitous opportunistic pathogen of environmental, mainly plant-associated, origin, and is commonly found in a wide range of environmental niches ( Palleroni and Bradbury, 1993 ; Ryan et al, 2009 ; Berg and Martinez, 2015 ; Gopi et al, 2020 ). It has also been described as a plant growth-promoting endophyte with beneficial effects due to its production of phytohormones and spermidine, phosphate solubilization, the potential to synthesize siderophores ( Singh and Jha, 2017 ; Abdelaziz et al, 2018 ; Alexander et al, 2019 ; Wozniak et al, 2019 ; Aeron et al, 2020 ; Alijani et al, 2020 ) and its capability for bioprotection against fungal and bacterial pathogens ( Narayanasamy, 2013 ; Kumar and Audipud, 2015 ; Elhalag et al, 2016 ; Rania et al, 2016 ). Additionally, some other abilities, including anti-quorum sensing and anti-biofilm bioactivities ( Singh et al, 2013 ; Achari and Ramesh, 2015 ), as well as the protection against biotic and abiotic stress ( Singh and Jha, 2017 ; Alexander et al, 2019 ), were demonstrated for this species.…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…The rice endophyte Pantoea agglomerans (YS19) showed nitrogen-fixing activity in vitro produced four different phytohormones, including IAA and promoted plant growth [14] "They found ubiquitous in roots and reduced at the time of tillering with subsequent stages" [15].…”

Section: Rice and Pantoea Inoculantmentioning

confidence: 99%

Plant Growth Promoting Rhizobacteria for Sustainable Production of Sugarcane and Rice

Khandagale,

Kansara,

Padsala

et al. 2024

IJPSS

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Sugarcane (Sacchraum officinarum L.) and rice (Oryza sativa L.) are important cash and staple crop in the world respectively. In today’s population explosion the lots of pressure on cropping land to mitigate the feed need of consumers with judicious use of chemical fertilizers without considering the health of soil and its sustainability. The rhizobacteria live region around roots (2-80 mm) of crop with divers, dynamic and complex microflora having capacity with direct and indirect beneficial effects on crop health by availability of different nutrient, siderophores, rhizo deposits, auxins and role with bioremediation. There are different types of bacteria is isolated from rhizosphere of sugarcane and rice having Bacillus, Rhizobium, comamonas, cyanaobacteria, Nodosilinea, Levinella and Pseudomonas genera with most efficient nitrogen producer, solubilizers of inorganic phosphate, potash and other macro and micronutrient. In rice microbiome as Levinella, Psudomonas Anaeromyxobacter, Arenimonas, Arthrobacter, Bacillus, Bellilinea Proteobacteria, Chloroflexi, Actinobacteria, Acidobacteria and cyanobacteria with strains of Nitrosomonas and Nitrobacter are further divided in vegetative and reproductive growth stage of rice crop. The article give brief idea about the large arena of them.

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“…MH000623). Strain FNS2 has been characterized as a facultative oligotrophic bacteria that shows antagonistic potential against phytopathogenic fungi (Abdelaziz et al 2018). However, it has never been reported for PGP activities.…”

Section: Isolates Selected For Acc Deaminase Activity and Thermohalot...mentioning

confidence: 99%

Selection of ACC deaminase positive, thermohalotolerant and drought tolerance enhancing plant growth-promoting bacteria from rhizospheres of Cyamopsis tetragonoloba grown in arid regions

Goyal

Kumar

Meena

et al. 2022

Letters in Applied Microbiology

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Significance and Impact of the Study: Plant growth-promoting bacteria (PGPBs) are widely acknowledged for rescuing crop productivity in regions experiencing biotic/abiotic stresses. However, their implementation in arid regions experiencing severe drought stress has remained elusive. It is reasoned that PGPBs must have extremophilic traits and plant growth promotion capabilities for their application in arid regions. Here we report on targeted selection of bacterial isolates that express ACC deaminase and are thermohalotolerant and have the potential for implementation as plant growth-promoting bacteria or biofertilizers in arid and semi-arid agroecosystems.

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Efficacy of Facultative Oligotrophic Bacterial Strains as Plant Growth-Promoting Rhizobacteria (PGPR) and their Potency Against Two Pathogenic Fungi Causing Damping-off Diseases

Cited by 5 publications

References 0 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

Plant Growth Promoting Rhizobacteria for Sustainable Production of Sugarcane and Rice

Selection of ACC deaminase positive, thermohalotolerant and drought tolerance enhancing plant growth-promoting bacteria from rhizospheres of Cyamopsis tetragonoloba grown in arid regions

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