Diversity of Plant Growth-Promoting Endophytic Bacteria, Genome Analysis of Strain Sx8-8 and Its Rice Germination Promoting Activity

Sitlaothaworn, Kanchana; Budsabun, Tanakwan; Booncharoen, Auttaporn; Panphut, Wattana; Savarajara, Ancharida; Tanasupawat, Somboon

doi:10.1134/s002626172260183x

Microbiology

2023

DOI: 10.1134/s002626172260183x

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Diversity of Plant Growth-Promoting Endophytic Bacteria, Genome Analysis of Strain Sx8-8 and Its Rice Germination Promoting Activity

Kanchana Sitlaothaworn

Tanakwan Budsabun

Auttaporn Booncharoen

et al.

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2024

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Cited by 4 publications

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Potentialities of Technosol-isolated PGPB consortium in promoting plant growth in lettuce seedlings

Castaldi,

Lorenz,

Vitale

et al. 2024

Plant Soil

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Background and aims Reducing land degradation and safeguarding agricultural productions ensures the provision of ecosystem services and economic welfare, as highlighted by the 2030 Sustainable Development Goals. Among the promising solutions to tackle these issues, the study investigates the use of Technosol-isolated PGPB, as a novel approach for enhancing plant growth and the capability to cope with soil salinization. Methods Several bacteria have been isolated from a Technosol in Naples (Italy), selected to produce a consortium, based on their PGP features and tested on lettuce. The promotion of lettuce growth was evaluated both in soil (sterilized and not-sterilized Technosols) and in water agar media differing in NaCl concentrations, focusing on total polyphenols, 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, soluble proteins, and sugars, which were evaluated on seedlings. Results Germination kinetics differed among treatments in both soil and artificial media setups. In the Technosol trial, the PGPB treated seeds were the quickest to emerge, showing a higher radical scavenging activity and lower soluble carbohydrate content. In the salinity trial, total soluble proteins were significantly higher in primed seeds at null saline cocentration. Conclusion Our results indicate that the PGPB application has a beneficial outcome on the Technosol but under saline stress produces an inhibitory or a costly effect on the biochemistry and germination kinetics. However, Technosol PGPBs employement may open new research scenarios on their potential application considering Nature-Based Solutions and/or plant growth in degraded environments.

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Potentialities of Technosol-isolated PGPB consortium in promoting plant growth in lettuce seedlings

Castaldi,

Lorenz,

Vitale

et al. 2024

Plant Soil

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Restoration of degraded seagrass meadows: Effects of plant growth-promoting rhizobacteria (PGPR) inoculation on Zostera marina growth, rhizosphere microbiome and ecosystem functionality

Sun,

Zhao,

Gao

et al. 2024

Journal of Environmental Management

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Genetic Diversity and Virulence of Phytopathogenic Burkholderia glumae Strains Isolated from Rice Cultivars in Valleys of the High Jungle of Perú

Valdez-Nuñez,

Ramos-Luna,

Meza-Catalán

et al. 2024

Plant Disease

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Burkholderia glumae causes bacterial leaf blight in rice, and its global spread has been exacerbated by climate change. To understand the genetic diversity and virulence of B. glumae strains isolated from rice cultivars in Peru, 47 isolates were obtained from infected rice fields, all belonging to B. glumae, and confirmed by recA and toxB sequences. The BOX-PCR typing group 38 genomic profiles, and these turn into 7 Variable Number Tandem Repeats (VNTR) haplotypes. There was no correlation between clustering and geographical origin. Nineteen strains were selected for phenotypic characterization and virulence, using both the maceration level of the onion bulb proxy and inoculation of seeds of two rice cultivars. Several strains produced pigments other than toxoflavin, which correlated with onion bulb maceration. In terms of virulence at the seed level, all strains produced inhibition at the root and coleoptile level, but the severity of symptoms varied significantly between strains, revealing significant differences in pathogenicity. There is no correlation between maceration and virulence scores, probably reflecting different virulence mechanisms depending on the host infection stage. This is the first study to evaluate the VNTR diversity and virulence of Peruvian strains of B. glumae in two commercial cultivars.

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Diversity of Plant Growth-Promoting Endophytic Bacteria, Genome Analysis of Strain Sx8-8 and Its Rice Germination Promoting Activity

Cited by 4 publications

References 44 publications

Potentialities of Technosol-isolated PGPB consortium in promoting plant growth in lettuce seedlings

Potentialities of Technosol-isolated PGPB consortium in promoting plant growth in lettuce seedlings

Restoration of degraded seagrass meadows: Effects of plant growth-promoting rhizobacteria (PGPR) inoculation on Zostera marina growth, rhizosphere microbiome and ecosystem functionality

Genetic Diversity and Virulence of Phytopathogenic Burkholderia glumae Strains Isolated from Rice Cultivars in Valleys of the High Jungle of Perú

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