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Vurali turcica is naturally grown in a limited area in Central Anatolia in Turkey and was categorized as a critically endangered plant in the Red Data Book of Turkish Plants. This study aimed to analyze whether the symbiotic and mutualistic relation between V. turcica rhizomes and present microfl ora in the habitat can be active on its distribution. Plant growth-promoting rhizobacteria (PGPRs) colonize the rhizosphere and promote plant growth and physiology. In this paper, the diversity of PGPRs of rhizomes of V. turcica was analyzed. Rhizome samples were obtained from the natural habitats of V. turcica by the workers of Nezahat Gökyiğit Botanical Garden, and bacterial isolation was conducted on the collected samples. MIS analysis, 16S rRNA, and 16S-23S rRNA ITS region sequencing were implemented, and as a result, Bacillus megaterium was found to be one of the most abundant bacterial species of the rhizomes of V. turcica based on nucleotide homology. This study is the first report on the identification of rhizobacterial species in V. turcica.

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Plant growth-promoting rhizobacteria are highly active in soil ecosystems for legumes due to their biotic activities. Vuralia turcica (Kit Tan, Vural & Kucukoduk) Uysal & Ertugrul is a Turkish endemic legume plant with potential value for ornamental and food crops. However, reports of plant growth-promoting rhizobacteria in V. turcica rhizosphere are lacking in the literature. This study includes endophytic bacterial isolation from V. turcica rhizospheric soil. The objective of this study was to isolate and characterize growth-promoting bacteria. V. turcica rhizospheric soils from four different locations of Central Anatolia of Turkey, namely L1 (Gölçayır, 38° 28´ 10.5´´ N/31° 21´ 04.4´´ E), L2 (Akşehir, 38° 28´ 17.328´´ N/31° 20´ 52.468´´ E), L3 (Dereçine, 38° 30´ 36.702´´ N/31° 17´ 56.702´´ E), L4 (Sultandağı, 38° 32´ 43.2168´´ N/31° 16´ 54.4728´´ E), were selected for bacterial isolation. Ten bacterial strains were isolated and identified through the comparison of the 16S rRNA and 16S-23S rRNA ITS region. Among them, 4 isolates belonged to Bacillus megaterium, 3 strains belonged to Stenotrophomonas rhizophila, 1 strain belonged to Rhodococcus erythropolis, 1 strain belonged to Xanthomonas albilineans, and the remaining 1 strain belonged to Lysobacter enzymogenes, respectively.

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