In this study three rhizobial samples R28, R51, R66 were anaysed using molecular phylogenetic methods. Rhizobial samples were isolated from P. vulgaris L. root nodules collected from Eskişehir province of Turkey and morphologically characterized in a previous study. Analyses were performed using a concatenated data set which composed of three housekeeping genes recA, atpD and glnII . Additionally two symbiotic genes, nodA and nifH, were sequenced and analysed to determine the symbiotic plasmid type. As a result of housekeeping gene phylogeny, isolate R28 was found to be related to R. laguerreae. Although other two isolates, R51 and R66, placed in the same lineage with R. sophoriradicis, they showed enough divergence to be considered as a new species. But this presumption need to be confirmed with further investigations. Network analyses of nodA and nifH genes clearly showed that R28 has a unique symbiotic plasmid. On the other hand, symbiotic plasmids of R51 and R66 found to be related to p42d which is the most common symbiotic plasmid in rhizobia nodulating P. vulgaris L. in Europe and also Turkey. In this study first report of R. laguerreae from Turkey is presented. More over, first report of a R. laguerreae isolate from P. vulgaris L. root nodules is also presented and suggested isolate R28 as R. laguerreae bv. phaseoli. Additionally, molecular hints for a potentially new rhizobial species have also given. But this presumption must be supported with some additional molecular and morphological investigations
Bu çalışmada üç rizobial örnek R28, R51, R66 moleküler filogenetik yöntemler kullanarak analiz edilmiştir. Rizobial örnekler önceki bir çalışmada izole edilmiş Türkiye’nin Eskişehir ilinden toplanmış P. vulgaris L. bitkisinin kök nodüllerinden ve morfolojik analizleri yapılmıştır. Analizler üç adet housekeeping genden recA, atpD and glnII oluşan birleştirilmiş bir veri seti kullanılarak yapılmıştır. Ek olarak, simbiyotik plazmit tipini belirlemek için nodA ve nifH olmak üzere iki simbiyotik genin dizilemesi yapılmış ve analizleri gerçekleştirilmiştir. Housekeeping gen filogenisin sonucu olarak izolat R28 R. laguerreae ile ilişkili olarak bulunmuştur. Diğer iki izolat R51 ve R66, R. sophoriradicis ile aynı soy hattında yer almasına rağmen yeni bir tür sayılabilecek kadar yeterli farklılık göstermiştir. Fakat bu öngörünün ileri araştırmalar ile doğrulanmaya gereksinimi vardır. NodA and nifH genlerinin network analizleri R28 in özgün bir simbiyotik plazmite sahip olduğunu açık bir şekilde göstermiştir. Diğer taraftan R51 ve R66’nın simbiyotik plazmitlerinin p42d ile ilişkili olduğu bulunmuştur, bu plazmit Avrupa ve Türkiye’de P. vulgaris L. ile kök nodülü oluşturan rhizobiadaki yaygın görülen simbiyotik plazmittir. Bu çalışmada R. laguerreae in Türkiye’den ilk kaydı sunulmuştur. Ötesinde, bir R. laguerreae izolatının P. vulgaris L. kök nodüllerinden ilk kaydıda verilmiştir ve izolat R28 R. laguerreae bv. phaseoli olarak önerilmiştir. Ek olarak yeni bir rizobial tür için moleküler ip uçlarıda sunulmuştur. Fakat bu öngörünün ilave bazı moleküler ve morfolojik araştırmalar ile desteklenmesi gerekmektedir
Primary Language | Turkish |
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Journal Section | Research Article |
Authors | |
Publication Date | August 15, 2018 |
Published in Issue | Year 2018 Volume: 11 Issue: 2 |
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