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Journals / Trakya University Journal of Natural Sciences / 2026 / Volume: 25 Issue: 1

Determination of plant growth promoting properties and bioremediation potentials of Bacillus mycoides Flügge and B. thuringiensis Berliner

Ülkü Zeynep Üreyen Esertaş(AĞRI İBRAHİM ÇEÇEN ÜNİVERSİTESİ, TIP FAKÜLTESİ, TIP PR.)0000-0001-9897-5313
Arif Bozdeveci(RECEP TAYYIP ERDOGAN UNIVERSITY)0000-0002-0729-9143
Emel Uzunalioğlu(RECEP TAYYIP ERDOGAN UNIVERSITY)0000-0001-9392-6926
Şengül Alpay Karaoğlu(Recep Tayyip Erdogan University, Department of Biology, Rize, Turkey)0000-0003-1047-8350
Pages
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Publication Date
2024-04-15
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The results showed that B. mycoides and B. thuringiensis isolates can be used as bioremidant agents in metal-contaminated soils and also as biological fertilizers due to their plant growth-promoting properties.

📌 3 Key Takeaways

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Objective & Hypothesis:Industrial activities destroying natural resources for decades have been one of the most significant factors in environmental destruction.
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Key Findings & Data:Heavy metals, one of these environmental pollutants, have become a significant health threat for organisms by forming metal accumulations in water and soil.
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Conclusion & Impact:The results showed that B. mycoides and B. thuringiensis isolates can be used as bioremidant agents in metal-contaminated soils and also as biological fertilizers due to their plant growth-promoting properties.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Bacillus · Copper tolerance · PGPR

Abstract

Industrial activities destroying natural resources for decades have been one of the most significant factors in environmental destruction. As a result of industrialization, environmental pollutants became one of the biggest threats for the biosphere. Heavy metals, one of these environmental pollutants, have become a significant health threat for organisms by forming metal accumulations in water and soil. In addition to the existing ones, most researchers believe that there is a great need for alternative biological processes to be used in the control of heavy metal pollution. Bioremediation is the process of removing various toxic pollutants, such as heavy metals from the environment, especially with the help of fungal and bacterial microorganisms, sometimes plants and earthworms. The use of bacteria in the bioremediation process is prevalent. In this study, the metal tolerance and plant growth-promoting properties of Bacillus mycoides and Bacillus thuringiensis isolated from the root soil of and orchid plant were investigated. The abilities of both bacteria to tolerate copper, lead, iron, silver, and zinc were tested in addition to and their indole acetic acid production (IAA), siderophore production, phosphate solubility and Aminocyclopropane-1-Carboxylate-deaminase (ACC-deaminase) activity were determined. The two isolates exhibited a high level of tolerance towards different pH levels, temperature ranges and metal concentrations. The results showed that B. mycoides and B. thuringiensis isolates can be used as bioremidant agents in metal-contaminated soils and also as biological fertilizers due to their plant growth-promoting properties.

Özet

Endüstriyel faaliyetler, onlarca yıldır doğal kaynakları yok eden çevresel tahribatın en önemli faktörlerinden biri olmuştur. Sanayileşmenin bir sonucu olarak, çevre kirleticileri biyosfer için en büyük tehditlerden biridir. Çevre kirleticilerinden biri olan ağır metaller, su ve toprakta metal birikimleri oluşturarak canlılar için önemli bir sağlık tehdidi haline gelmiştir. Bu nedenle ağır metal kirliliği ile mücadelede alternatif biyolojik süreçlere büyük ihtiyaç duyulmaktadır. Biyoremediasyon, ağır metal gibi çeşitli toksik kirleticilerin özellikle fungal ve bakteriyel mikroorganizmalar, bazen bitkiler ve toprak solucanları yardımıyla ortamdan uzaklaştırılması işlemidir. Biyoremediasyon sürecinde bakterilerin kullanımı yaygındır. Bu çalışmada, orkide kök toprağından izole edilen Bacillus mycoides ve Bacillus thuringiensis'in metal toleransı ve bitki büyümesini destekleyici özellikleri araştırıldı. Spesifik olarak, bakır, kurşun, demir, gümüş ve çinko metallerini tolere etme yetenekleri ve indol asetik asit üretimi, siderofor üretimi, fosfat çözünürlüğü ve 1-Aminosiklopropan-1-karboksilat-deaminaz (ACC-deaminaz) aktivitesi belirlendi. İki izolatın farklı pH seviyelerine, sıcaklık aralıklarına ve metal konsantrasyonlarına karşı yüksek düzeyde tolerans gösterdiği bulundu. Sonuçlar, B. mycoides ve B. thuringiensis izolatlarının metalle kontamine topraklarda biyoremidant ajanlar olarak ve ayrıca bitki gelişimlerini teşvik edici özellikleri nedeniyle biyolojik gübre olarak da kullanılabileceğini göstermiştir.

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Cite This Article

Esertaş, Ü. Z. Ü., Bozdeveci, A., Uzunalioğlu, E., Karaoğlu, Ş. A. (2024). Determination of plant growth promoting properties and bioremediation potentials of Bacillus mycoides Flügge and B. thuringiensis Berliner. Trakya University Journal of Natural Sciences, Volume: 25 Issue: 1. https://doi.org/10.23902/trkjnat.1358924

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