Akademik Veri Yönetim Sistemi
Turkish Journal of Biology, cilt.43, sa.6, ss.391-403, 2019 (Scopus)
In the present study it was aimed to obtain novel strains of actinomycetes that have the ability to promote plant growth. Forthis, seven soil samples from the rhizosphere of Humulus lupulus (Pazaryeri, Bilecik) were used and potential isolates were obtained.16S rRNA genes of 30 isolates were amplified by PCR and sequenced. Eighteen isolates were found to be closely related to Streptomycetesspp. and they were tested for their proteolytic activity, cellulase activity, phosphate solubility, IAA production, biofilm formation, andgrowth in nitrogen-limited medium. Two isolates, HCI 12 and HCI 36, were selected according to the results of these tests and theireffects on growth of tomato plants (Solanum lycopersicum) were determined. Results indicated that the HCI 12 and HCI 36 strainscaused a significant increase in root and shoot lengths, dry/fresh weights, and vigor index values compared to the control. The changein macromolecular structure including carbohydrates, proteins, and lipids of tomato plants with HCI 12 and HCI 36 inoculation wasdetermined by Fourier transform infrared (FTIR) analysis. The results obtained from FTIR analysis were used in principal componentanalysis to evaluate changes in amide, carbohydrate, and lipid ratios of plant leaves due to microorganism application. Inoculation withthe HCI 12 and HCI 36 strains caused a significant increase in the total carbohydrate and lipid ratio of tomato.