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Species Diversity of Rhizobia

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Book cover Rhizobium Biology and Biotechnology

Part of the book series: Soil Biology ((SOILBIOL,volume 50))

Abstract

The nitrogen-fixing bacteria that are capable of nodulating legumes are called rhizobia. Recycling of nitrogen through natural processes, i.e. symbiotic nitrogen fixation is considered as the most appropriated method for the long-term management of nutrients. These bacteria are heterogeneous assemblage of Gram-negative, aerobic, non-sporulating rod shaped, symbiont of legumes, and soil bacteria. The taxonomy and diversity of rhizobia were changed enormously in last two decades. Only about 20% of the total of about 20,000 species and 57% of about 750 genera of legume plants has been studied for nodulation. The species listed herein are authentically published names of rhizobia consisting 176 species spread over 15 genera and have been validated using molecular markers. There are many legumes and ecosystems that have not been analysed yet and then the number of rhizobial species and symbiovars are expected to increase in further. MultiLocus Sequence Analysis (MLSA) is currently being used for further segregation of species with accurate taxon. Consequently, whole genomes could be considered as the best alternative to studying diversity assessment and cataloguing of rhizobia species.

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Authors and Affiliations

  1. Department of Botany, JNV University, Jodhpur, 342001, India

    A. Tak & P. Gehlot

  2. Central Arid Zone Research Institute, Jodhpur, 342005, India

    R. Pathak & S. K. Singh

Authors
  1. A. Tak
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  2. P. Gehlot
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  3. R. Pathak
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  4. S. K. Singh
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Corresponding author

Correspondence to P. Gehlot .

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Editors and Affiliations

  1. Sankt Augustin, NRW, Germany

    Alexander P. Hansen

  2. Amity Institute of Microbial Technology, Amity University Uttar Pradesh, Noida, Uttar Pradesh, India

    Devendra K. Choudhary

  3. National Agricultural Science Fund, Indian Council of Agricultural Research, New Delhi, India

    Pawan Kumar Agrawal

  4. Amity Institute of Microbial Technology, Amity University Uttar Pradesh, Noida, Uttar Pradesh, India

    Ajit Varma

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Tak, A., Gehlot, P., Pathak, R., Singh, S.K. (2017). Species Diversity of Rhizobia. In: Hansen, A., Choudhary, D., Agrawal, P., Varma, A. (eds) Rhizobium Biology and Biotechnology. Soil Biology, vol 50. Springer, Cham. https://doi.org/10.1007/978-3-319-64982-5_11

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