Diverse Rhizobium strains isolated from root nodules of Trifolium alexandrinum in Egypt and symbiovars
Systematic and Applied Microbiology, ISSN: 0723-2020, Vol: 44, Issue: 1, Page: 126156
2021
- 17Citations
- 38Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Metrics Details
- Citations17
- Citation Indexes15
- 15
- CrossRef2
- Clinical Citations1
- PubMed Guidelines1
- Policy Citations1
- 1
- Captures38
- Readers38
- 38
Article Description
Berseem clover ( T. alexandrinum ) is the main forage legume crop used as animal feed in Egypt. Here, eighty rhizobial isolates were isolated from root nodules of berseem clover grown in different regions in Egypt and were grouped by RFLP-16S rRNA ribotyping. Representative isolates were characterized using phylogenetic analyses of the 16S rRNA, rpoB, glnA, pgi, and nodC genes. We also investigated the performance of these isolates using phenotypic tests and nitrogen fixation efficiency assays. The majority of strains (<90%) were closely related to Rhizobium aegyptiacum and Rhizobium aethiopicum and of the remaining strains, six belonged to the Rhizobium leguminosarum genospecies complex and only one strain was assigned to Agrobacterium fabacearum. Despite their heterogeneous chromosomal background, most of the strains shared nodC gene alleles corresponding to symbiovar trifolii. Some of the strains closely affiliated to R. aegyptiacum and R. aethiopicum had superior nodulation and nitrogen fixation capabilities in berseem clover, compared to the commercial inoculant (Okadein®) and N-added treatments. R. leguminosarum strain NGB-CR 17 that harbored a nodC allele typical of symbiovar viciae, was also able to form an effective symbiosis with clover. Two strains with nodC alleles of symbiovar trifolii, R. aegyptiacum strains NGB-CR 129 and 136, were capable of forming effective nodules in Phaseolus vulgaris in axenic greenhouse conditions. This adds the symbiovar trifolii which is well-established in the Egyptian soils to the list of symbiovars that form nodules in P. vulgaris.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0723202020301119; http://dx.doi.org/10.1016/j.syapm.2020.126156; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85098708736&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/33232849; https://linkinghub.elsevier.com/retrieve/pii/S0723202020301119; https://dx.doi.org/10.1016/j.syapm.2020.126156
Elsevier BV
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