ArticleBMC microbiology2019
Indole-3-acetic acid production by Streptomyces fradiae NKZ-259 and its formulation to enhance plant growth.
Article in BMC microbiology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers.
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65 citing papers in PubMed, 199 citations in OpenAlex.
- Type III secretion system diversity in the Pseudomonas fluorescens species complex.The New phytologist · 2026Article
- Cultivable diversity and plant growth-promoting traits of free-living bacteria from coffee soils under contrasting fertilization systems.International microbiology : the official journal of the Spanish Society for Microbiology · 2026Article
- Streptomyces as microbial biofactories: optimization of auxin production and growth-promoting activity of cell-free supernatants in soybean (Glycine max (L.) Merr.).Folia microbiologica · 2026Article
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- Comparative Transcriptome Analysis of Leaves and Roots Responses in Salt-Tolerant Barley Line CC89/Giza123 Under Salinity Stress.Current issues in molecular biology · 2026Article
- Rice Genotype-Dependent Phyllosphere Microbiome Assembly and Isolation of AntagonisticInternational journal of molecular sciences · 2026Article
- Multivariate analysis and machine learning prediction of Sorghum cultivar traits under nitrogen regulation.BMC plant biology · 2026Article
- Biosynthesis of auxin and other plant growth-promoting traits from novel endophyte Fusarium incarnatum SELC2 and its in vitro plant growth-promoting efficacy on rice (Oryza sativa L.).World journal of microbiology & biotechnology · 2026Article
- Genome Insight and factorial design to elucidate the regulation of the tryptophan-mediated IAA biosynthetic pathway in an endophyte.Scientific reports · 2026Article
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- Unveiling the diversity and mechanisms of plant growth-promoting bacteria in orchids: a comprehensive review.Frontiers in microbiology · 2026Review
- Functional characterization and mechanistic basis of antifungal and plant growth-promoting traits ofFrontiers in microbiology · 2026Article
- Characterization of Culturable Plant Growth-promoting Bacteria Isolated from Amaranthus hypochondriacus L. Roots.Microbes and environments · 2026Article
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- Optimization of auxin production by Streptomyces californicus CLV91 for plant growth promotion.International microbiology : the official journal of the Spanish Society for Microbiology · 2025Article
- Biocontrol of Bacterial Seedling Rot in Rice Plants Using Bacillus velezensis JBCS608 and Its Formulated Products.The plant pathology journal · 2025Article
- Improvement of Growth and Selenium Absorption Characteristics of Tomato Plant by Lactic Acid Bacterial Biochar Fertilizer.Current microbiology · 2025Article
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- The effect of Streptomyces fradiae strain JB-1 on Bactrocera dorsalis species complex pupal development in various soil levels.Scientific reports · 2025Article
- Streptomyces gilvus sp. nov., Actinomycete Isolated from Cassava (Manihot esculenta Crantz) Rhizosphere Soil.Current microbiology · 2025Article
5 more citing papers are in PubMed but not listed here.
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Authors and funding
8 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundIndole-3-acetic acid (IAA) is produced by microorganisms and plants via either tryptophan-dependent or tryptophan-independent pathways. Herein, we investigated the optimisation of IAA production by Streptomyces fradiae NKZ-259 and its formulation as a plant growth promoter to improve economic and agricultural development.
resultsThe maximum IAA yield achieved using optimal conditions was 82.363 μg/mL in the presence of 2 g/L tryptophan after 6 days of incubation. Thin-layer chromatography (TLC) and high-performance liquid chromatography (HPLC) analysis of putative IAA revealed an RF value of 0.69 and a retention time of 11.842 min, comparable with the IAA standard. Regarding product formulation, kaolin-based powder achieved a suspension rate of 73.74% and a wetting time of 80 s. This carrier exhibited good shelf life stability for NKZ-259, and the cell population did not decrease obviously over 4 months of storage at 4 °C. In vivo analysis of plant growth promotion showed that tomato seedlings treated with kaolin powder containing NKZ-259 cells displayed a significant increase in root and shoot length of 7.97 cm and 32.77 cm, respectively, and an increase in fresh weight and dry weight of 6.72 g and 1.34 g. Compared to controls, plant growth parameters were increased almost it two-fold.
conclusionOptimising the culture conditions resulted in an almost four-fold increase in IAA secretion by NKZ-259 cells. The results clearly demonstrate that S. fradiae NKZ-259 holds great potential for plant growth promotion and IAA production. Furthermore, kaolin-based powder is an effective carrier for NKZ-259 cells and may be useful for commercial applications.
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