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Karışım Herbisitlerin (Halauxifen methyl+Pyroxsulam+Cloquintocet asit) In Vivo Toksisitesi: Zebra Balığı Embriyo ve Larva Modeli
Summary
This Turkish study tested the toxicity of a mixed herbicide formulation on zebrafish embryos and larvae. While focused on pesticide safety rather than microplastics, zebrafish are widely used to assess how environmental chemical mixtures affect early development.
Herbisitler suda yaşayan organizmalar ve insan sağlığı için ciddi tehlike oluşturabilir. Karışım formülasyonu olarak hazırlanan herbisitler ise çok daha fazla toksik etkilere sahip olabilir ancak literatürde bu herbisitlerin toksisitelerini gösteren az sayıda çalışma vardır. Çalışmamızda, piyasada son yıllarda yoğun kullanılan karışım herbisitlerin (Halauxifen methyl+Pyroxsulam+Cloquintocet asit) farklı konsantrasyonlarının (0.25, 0.5 ve 1 ppm) zebra balığı embriyo ve larvalarındaki toksik etkileri gelişimsel parametreler ve davranış testleri ile değerlendirilmiştir. Karışım herbisitlere 96 saat maruz kalan embriyo ve larvalarda özellikle en yüksek uygulama konsantrasyonunda (1 ppm) hayatta kalma oranı azalmış ve larvaların koryondan çıkışı gecikmiştir. Embriyo ve larvalarda karışım herbisitlerin etkisi ile çeşitli malformasyonlar gözlemlenmiştir. Ayrıca karışım herbisit 1 ppm konsantrasyonda zebra balığı larvalarında 96. saatte kat ettikleri toplam mesafede artış olmuş ve hiperaktivite meydana geldiği belirlenmiştir. Çalışmamız karışım kimyasalların sucul organizmalardaki toksik etkilerinin anlaşılması açısından önemli veri sağlamaktadır. Sonuç olarak sucul ekosistemde karışım olarak bulunan kimyasalların (herbisit, insektisit, fungusit veya ağır metaller) sucul canlılar için bir tehdit olduğu düşüldüğünden daha fazla ve detaylı çalışmaların yapılması gerekmektedir.
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