Bacillus thuringiensis

Bacillus thuringiensis
B. thuringiensis serovar morrisoni'den elde edilmiş Bt toksin kristalleri
Biyolojik sınıflandırma Bu sınıflandırmayı düzenle
Üst âlem: Bacteria
Şube: Firmicutes
Sınıf: Bacilli
Takım: Bacillales
Familya: Bacillaceae
Cins: Bacillus
Tür: B. thuringiensis
İkili adlandırma
Bacillus thuringiensis
Berliner 1915[1]
Gram boyamada Bacillus thuringiensis, 1000 X büyütme

Bacillus thuringiensis (Bt) genellikle biyolojik pestisit olarak kullanılan, Gram-pozitif, toprakta yaşayan bir bakteridir.[2] B. thuringiensis çeşitli güve ve kelebek türlerinin tırtıllarının bağırsaklarında, yaprak yüzeylerinda, sucul ortamlarda, hayvan dışkısında, böcek popülasyonunun yoğun olduğu ortamlarda, un değirmenleri ve tahıl depolama tesislerinde doğal olarak bulunmaktadır.

Sporlanma sırasında, birçok Bacillus thuringiensis suşunun δ-endotoksinleri denilen kristal proteinleri (proteinli inklüzyonlar) üreterek böcekleri öldürdüğü görülmüş bu da böcek öldürücü maddeler olarak kullanımına yol açmıştır. Birçok kristal üreten Bacillus thuringiensis suşu olsa da hepsinin böcek öldürücü özellikleri yoktur.

Kaynakça

  1. ^ Berliner E. (1915). "Über die Schlaffsucht der Mehlmottenraupe (Ephestia kühniella Zell) und ihren Erreger Bacillus thuringiensis n. sp". Zeitschrift für angewandte Entomologie Berlin. 2: 29-56. 
  2. ^ britannica.com[ölü/kırık bağlantı]

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