Bacterial strains with nutrient mobilisation ability from ciuc mountains (Transylvania Region, Romania)

Abstract

This chapter presents the study about some wild leguminous plant's nodule and rhizosphere bacteria from Ciuc Mountains with beneficial traits related to mineral nutrition and their multiple plant growth-promoting activities as a part of plant-bacteria interaction. The isolated bacterial strains have nutrient mobilisation abilities and plant growth stimulation effect as phosphate solubilisation, nitrogen fixation and sid- erophore and indole-3-acetic acid production. During this study, we identified, on the basis of 16S rDNA sequence, 21 bacterial strains originated from different leguminous plants nodules and rhizosphere. These bacterial strains belong to diverse bacterial genus and were identified as Rhizobium leguminosarum (CM2, CM3, CM9, CM11, CM13, CM14, CM15), Rhizobium yanglingense CM1, Bacillus sp. CM4, Mitsuaria chitosanitabida CM5, Variovorax paradoxus CM6 and CM8, Rhizobium rhizogenes CM7, Sinorhizobium meliloti CM10, Rhizobium etli CM12, Pseudomonas abietaniphila CM16, Pseudomonas bras- sicacearum CM17, Acinetobacter johnsonii CM18, Ensifer (Sinorhizobium) sp. CM19, Serratia proteamaculans CM20 and Serratia sp. CM21. The present study revealed two interesting strains, Mitsuaria chitosanitabida CM5 and Acinetobacter johnsonii CM18 with beneficial characteristics as improving the availability of different nutrients. The identified and denotated allochthonous bacterial strains with beneficial characteristics confer beneficial effects to plants as a part of the plant functional diversity and microbial composition and are important in sustainable agriculture.