Genetic diversity among bradyrhizobium isolates that effectively nodulate peanut (Arachis hypogaea)

Canadian Journal of Microbiology
B E Urtz, G H Elkan

Abstract

Symbiotic gene diversity and other measures of genetic diversity were examined in Bradyrhizobium isolates that form an effective symbiosis with peanut (Arachis hypogaea). Initially, restriction fragment length polymorphism (RFLP) analysis using a nitrogenase (nif) gene probe was performed on 33 isolates along with one Bradyrhizobium elkanii and two Bradyrhizobium japonicum strains. Considerable diversity was observed among the RFLP patterns of many of the isolates, especially those from South America. Some isolates, however, were found to have similar nif and subsequent nod (nodulation) gene RFLP patterns, indicating symbiotic gene relatedness. With some noted exceptions, symbiotic gene relatedness correlated with relatedness based on total DNA homology and ribotyping analyses. Symbiotic gene relatedness also correlated with symbiotic effectiveness. The RFLP and DNA homology analyses indicate that bradyrhizobia effective with peanut are genetically diverse and consist of at least three different species. This diversity, however, was not particularly evident with partial 16S rRNA gene sequencing. Sequences obtained from the isolates were very similar to each other as well as to sequences previously reported for other Bradyrhizob...Continue Reading

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Citations

Mar 18, 2009·Applied Microbiology and Biotechnology·Daisy Rickli BindeMariangela Hungria
Sep 28, 2007·Current Microbiology·Pablo BoginoWalter Giordano
Mar 29, 2011·Current Microbiology·Jorge AngeliniAdriana Fabra
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Jun 10, 2008·Bioscience, Biotechnology, and Biochemistry·Muhammad Saiful IslamTatsuji Seki
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Jul 6, 2014·Systematic and Applied Microbiology·Jing Yu ChenYan Ling Wu
Sep 28, 2015·International Journal of Systematic and Evolutionary Microbiology·Yong Hua LiWen Xin Chen
Mar 19, 2013·International Journal of Systematic and Evolutionary Microbiology·Jakeline Renata Marçon DelamutaMariangela Hungria
Dec 25, 2009·FEMS Microbiology Letters·Daniela B MedeotIsabel M López-Lara
Mar 28, 2017·International Journal of Molecular Sciences·Mitchell Andrews, Morag E Andrews
Mar 31, 2017·Antonie van Leeuwenhoek·F NievasP Bogino
Feb 10, 2010·Journal of Basic Microbiology·Pablo BoginoWalter Giordano

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