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  4. Effect of Different Plant Growth-Promoting Rhizobacteria on Biological Soil Properties, Growth, Yield and Quality of Oregano (Origanum onites L.)
 
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Effect of Different Plant Growth-Promoting Rhizobacteria on Biological Soil Properties, Growth, Yield and Quality of Oregano (Origanum onites L.)

Type
Journal article
Language
English
Date issued
2023
Author
Çakmakçı, Ramazan
Haliloglu, Kamil
Türkoğlu, Aras
Özkan, Güller
Kutlu, Meral
Varmazyari, Atefeh
Molnar, Zoltan
Jamshidi, Bita
Pour-Aboughadareh, Alireza
Bocianowski, Jan 
Faculty
Wydział Rolnictwa, Ogrodnictwa i Biotechnologii
PBN discipline
agriculture and horticulture
Journal
Agronomy
ISSN
2073-4395
DOI
10.3390/agronomy13102511
Web address
https://www.mdpi.com/2073-4395/13/10/2511
Volume
13
Number
10
Pages from-to
art. 2511
Abstract (PL)
I
Abstract (EN)
Intensive agriculture uses continuous chemical fertilizers to increase crop yields, but excessive use of fertilizers leads to environmental pollution, permanent changes in physicochemical conditions in soil ecology, deterioration of soil biological health, leaching of nutrients, surface and groundwater pollution and eutrophication. Plant growth-promoting rhizobacteria (PGPR) are becoming increasingly important for ensuring crop safety, increasing nutrient uptake and output, lowering fertilizer costs, preventing environmental contamination and promoting sustainable agriculture and agricultural resources. Therefore, the purpose of this study was to identify and evaluate the effects of fifteen bacteria strains that were isolated from various acidic rhizospheric soils as biofertilizers on soil biological properties. Growth, yield and quality traits were analyzed, and various PGPR were identified using 16S ribosomal RNA of Turkish oregano. Fifteen bacterial inoculations with 1-aminocyclopropane-1-carboxylate (ACC) deaminase, N2-fixing, P-solubilizing and/or IAA-producing genes were used in the experiment, which was carried out in a randomized block design with five replicates (each with three pots) and a control without inoculation. Increased biological activity in soil inoculated with bacteria with multiple traits was confirmed by high C and N content in microbial biomass, urease, dehydrogenase and acid and alkaline phosphatase activities. Essential oil content, oil yield, thymol and carvacrol contents increased by 0.5–40.1%, 5.9–71.9%, 0.07–16.7% and 0.3–9.2%, respectively, as a result of bacterial inoculation. Oil content ranged from 2.02% to 2.83%; carvacrol (66.1–72.2%) was the main constituent, followed by thymol (14.5–16.9%) and linalool (1.38–3.68%). Two large PGPR groups were formed based on genetic distance analysis. Responses were variable and depended on the inoculant strain and the parameters being evaluated. The results indicate PGPR has clear potential for improving the yield of cultivated aromatic and essential oil plants, such as oregano.
Keywords (EN)
  • medicinal plants

  • oregano

  • phylogenetic analysis

  • biomass

License
cc-bycc-by CC-BY - Attribution
Open access date
September 28, 2023
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