Araştırma Makalesi

Isolation, Identification, and In Vitro Biological Control of Olive Knot Disease Agent With Antagonist Bacillus spp.

Cilt: 28 Sayı: 6 20 Ekim 2025
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Isolation, Identification, and In Vitro Biological Control of Olive Knot Disease Agent With Antagonist Bacillus spp.

Abstract

In this study, 18 olive orchards in the provinces of Mersin and Osmaniye in Türkiye, where olives are grown, were visited, and 26 bacterial isolates were obtained from six trees showing symptoms of olive knot disease. The bacterial isolates were identified by morphological and biochemical tests (Gram reaction and LOPAT characteristics) and by MALDI-TOF MS analysis at the species level. Based on pathogenicity tests, all bacterial isolates were identified as Pseudomonas savastanoi pv. savastanoi. In biocontrol studies, the antibacterial effects of 19 epiphytic biocontrol agent (BCAs) bacterial isolates were investigated using in vitro dual culture tests in Petri dishes. In the dual culture test, all antagonistic BCA bacterial isolates formed an inhibition zone of 2.0 to 9.3 mm and thus inhibited the growth of the pathogen. Diagnostic tests for BCA bacterial isolates performed with MALDI-TOF identified all effective antagonist isolates as Bacillus spp. Five antagonist bacterial isolates belonging to the same statistical group (Bacillus subtilis KSY9, Bacillus subtilis ABK-FY-2-5, Bacillus amyloliquefaciens ssp. plantarum MTHM.3, Bacillus amyloliquefaciens ssp. plantarum FT2.1 and Bacillus amyloliquefaciens ssp. plantarum MTHM2) were identified as the most successful in inhibiting pathogen growth. The isolate Bacillus subtilis KSY9 formed an average inhibition zone of 9.33 mm and was thus the most successful antagonist. This study once again emphasises the importance of biological control as an environmentally friendly method of organic farming to combat diseases.

Keywords

Destekleyen Kurum

Osmaniye Korkut Ata University’s Scientific Research Projects Unit

Proje Numarası

OKÜBAP-2023-PT2-005

Kaynakça

  1. Abuamsha, R., Kluepfel, D., Mc Clean, A. & Salman, M. (2024). Evaluation of commercial olive accessions for resistance to the olive knot disease caused by Pseudomonas savastanoi pv. savastanoi. Arabian Journal for Science and Engineering, 49(1), 87-95. https://doi.org/10.1007/s13369-023-08054-7
  2. Aktan, Z.C. & Soylu, S., 2020. Diyarbakır ilinde yetişen badem ağaçlarından endofit ve epifit bakteri türlerinin izolasyonu ve bitki gelişimini teşvik eden mekanizmalarının karakterizasyonu. KSU Tarım ve Doğa Dergisi, 23, 641-654. https://doi.org/10.18016/ksutarimdoga.vi.659802
  3. Aktepe, B. P. & Aysan, Y. (2023). Biological control of fire blight disease caused by Erwinia amylovora on apple. Erwerbs-Obstbau, 65(4), 645–654. https://doi.org/10.1007/s10341-022-00751-1
  4. Al-Khatib, M., Alhussaen, K., El-Banna, N. & Zyadeh, M. (2010). Biological control of olive leaf spot (peacock spot disease) caused by Cycloconium oleaginum (Spilocea oleaginea). Journal of Microbiology and Antimicrobials, 2(6), 64–67.
  5. Azeri, T. (1993). Research on olive leaf spot, olive knot and verticillium wilt of olive in Türkiye. EPPO Bulletin, 23, 437–440. https://doi.org/10.1111/j.1365-2338.1993.tb01349.x
  6. Basim, H. & Ersoy, A. (2000). Batı Akdeniz Bölgesinde zeytin ağaçlarında Pseudomonas savastanoi pv. savastanoi tarafından oluşturulan bakteriyel dal kanseri hastalığının yayılışı ve hastalık etmeninin tanısı. Türkiye 1. Zeytincilik Sempozyumu, 6-9 Haziran 2000, Bursa, sayfa: 310-315.
  7. Basım, H., Basım, E. & Ersoy, A. (2019). Phenotypic and genotypic characterization of Pseudomonas savastanoi pv. savastanoi causing olive knot disease in Türkiye. Applied Ecology and Environmental Research, 17(6). http://doi.org/10.15666/aeer/1706_1492714944
  8. Bitgen, E. & Mirik, M. (2021). Tekirdağ ilinde yetişen zeytin ağaçlarında dal kanseri hastalığı etmeni Pseudomonas savastanoi pv. savastanoi’nin tanısı ve antagonist bakteriyel izolatlar ile biyolojik mücadelesi. MKÜ Tarım Bilimleri Dergisi, 26(2), 326–336. https://doi.org/10.37908/mkutbd.881977

Ayrıntılar

Birincil Dil

İngilizce

Konular

Fitopatoloji

Bölüm

Araştırma Makalesi

Yazarlar

Ogün Küçüktamer
0009-0003-0525-6187
Türkiye

Erken Görünüm Tarihi

14 Ağustos 2025

Yayımlanma Tarihi

20 Ekim 2025

Gönderilme Tarihi

7 Mayıs 2025

Kabul Tarihi

3 Temmuz 2025

Yayımlandığı Sayı

Yıl 2025 Cilt: 28 Sayı: 6

Kaynak Göster

APA
Küçüktamer, O., & Pınar Aktepe, B. (2025). Isolation, Identification, and In Vitro Biological Control of Olive Knot Disease Agent With Antagonist Bacillus spp. Kahramanmaraş Sütçü İmam Üniversitesi Tarım ve Doğa Dergisi, 28(6), 1414-1426. https://doi.org/10.18016/ksutarimdoga.vi.1686824

21082



2024-JIF = 0.500

2024-JCI = 0.14

Uluslararası Hakemli Dergi (International Peer Reviewed Journal)

       Dergimiz, herhangi bir başvuru veya yayımlama ücreti almamaktadır. (Free submission and publication)

      Yılda 6 sayı yayınlanır. (Published 6 times a year)


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