Bitki gelişimini Teşvik Eden Rizobakteriler tarafından Üretilen Metabolitler ve Bitki Gelişimine Etkileri

Abstract

Çevresel stres bitki gelişimini olumsuz etkiler. Kuraklık, tuzluluk, ağır metaller, sıcaklık gibi abiyotik faktörler bitkisel verimin azalmasına neden olurlar. Mikroorganizmalar tarafından üretilen metabolitler en önemli bitki gelişme düzenleyicilerindendir. Strese karşı bitki savunma mekanizmalarını stimüle ederler. Rizosfer bakterileri oksin, sitokinin, gibberellin, etilen ve absisik asit gibi bitki hormonlarını üreterek bitki gelişimini teşvik ederler. Mineral fosfatın ve diğer besin maddelerinin çözünmesi, strese karşı direncin arttırılmasında, toprak agregatlarının stabilizasyonunda ve toprağın organik madde içeriğinin iyileştirilmesine yardımcı olurlar. Bu derlemede, bitkilerin stres toleransını indükleyen  rizobakteriler tarafından üretilen metabolitler ile ilgili yapılan çalışmalar özetlenmiştir.

Keywords

• Bitki gelişimini teşvik,stres faktörleri,rizosfer,metabolit,abiyotik faktörler

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