Effects of Invasive Plants(Xanthium spinosum, Xanthium strumarium and Phragmites australis) on Rhizobacteria Density

Abstract

This study investigated whether certain invasive plant species affect the densities of soil bacteria essential for plant growth in agricultural regions. In this study, the densities of nitrogen-fixing (NF), phosphate-solubilizing (PS), and sidero-phore-producing bacteria (SPB) were assessed in the rhizospheres of the invasive plants Xanthium spinosum, Xanthium strumarium, and Phragmites australis in wheat cultivation areas of Çorum, Turkey. The microbial densities in the rhizo-spheres of these invasive plants were then compared to those found in the rhizo-spheres of wheat. The research findings indicated that the rhizosphere microbial density of invasive plants varied according to plant type and localit, with these variations between the wheat rhizosphere soil and those of other plant types at the same location showing statistical significance(p≤0.05). However, when comparing the biochemical properties of invasive plants and wheat rhizosphere soil, no sta-tistically significant difference was observed. The results suggest that invasive plants such as X. spinosum, X. strumarium, and P. australis reduce the microbial density of NFB, PSB, and SPB in environments with similar soil properties. Nonetheless, further research is necessary to deepen the analysis of the relation-ship between plant species and soil structures to better understand the mechanisms behind the decline in bacterial density

Keywords

• invasive plants
• rhizosphere bacteria
• Xanthium spinosum
• Xanthium strumarium
• Phragmites australis

Bazı İstilacı Bitkilerin (Xanthium spinosum, Xanthium strumarium ve Phragmites australis) Kök Bakterileri Yoğunlukları Üzerine Etkileri

Abstract

Bu çalışmanın amacı, bazı istilacı bitki türlerinin tarımsal bölgelerde bitki bü-yümesi için gerekli olan belirli toprak bakterilerinin yoğunluklarını etkileyip et-kilemediğini araştırmaktır. Bu araştırmada, Türkiye'de Çorum ilinde, buğday ekim alanlarında görülen istilacı bitkiler Xanthium spinosum, Xanthium strumarium ve Phragmites australis 'in rizosfer toprağında azot bağlayıcı (NF), fosfor çözücü (PS) ve siderofor üreten bakterilerin (SPB) yoğunlukları belirlenmiştir. Bu istilacı bit-kilerin rizosferindeki mikrobiyal yoğunluklar daha sonra buğday bitkisinin ri-zosfer toprağındaki aynı özellikteki bakteri yoğunluğu ile karşılaştırılmıştır. Araştırma bulguları, istilacı bitkilerin rizosfer mikrobiyal yoğunluğunun bitki tü-rüne ve lokaliteye göre değiştiğini ve bu mikrobiyal yoğunluğun buğday rizosfer toprağı arasında aynı lokasyon içinde istatistiksel olarak anlamlı olduğunu gös-termiştir (p≤0.05). Bununla birlikte, istilacı bitkiler ile buğday rizosfer toprağının biyokimyasal özellikleri karşılaştırıldığında, istatistiksel olarak anlamlı bir fark gözlenmemiştir. Çalışma sonucunda, X. spinosum, X. strumarium ve P. australis gibi istilacı bitkilerin benzer toprak özelliklerine sahip ortamlarda bitki gelişimi için önemli olan NFB, PSB ve SPB'nin mikrobiyal yoğunluğunu azaltabileceğini göstermiştir. Bununla birlikte, bakteri yoğunluğundaki düşüşün arkasındaki me-kanizmaları daha iyi anlamak için bitki türlerinin ve toprak yapılarının analizini derinleştirmek için daha fazla araştırma yapılması gerekmektedir.

Keywords

• istilacı bitkiler
• rizosfer bakterileri
• Xanthium spinosum
• Xanthium strumarium
• Phragmites australis

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