Diversity and Phylogeny of Root Nodule Bacteria Isolated fromTree, Shrub and Food Legumes of Ethiopia
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Genetic Diversity and Metabolites Production of Root-Nodule Bacteria Isolated from Medicinal Legumes Indigofera tinctoria, Pueraria mirifica and Derris elliptica Benth. Grown in Different Geographic Origins Across Thailand
A total of 215 root-nodule bacteria were isolated from 3 medicinal legumes including Indigofera tinctoria, Pueraria mirifica and Derris elliptica Benth. naturally grown in 16 provinces of Thailand. The isolates were evaluated for DNA polymorphism using randomly amplified polymorphic DNA (RAPD) analysis. Isolates generated 92 identical RAPD profiles, indicating highly significant genetic diversi...
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Pulse, pasture and grain legumes are important for maintaining productivity in many agricultural systems. The formation of effective nitrogen-fixing symbioses between legumes and root nodule bacteria is essential for many legumes in agriculture. In many situations, soil inoculation with effective strains of root nodule bacteria is required for maximising legume yields. A key strategy to enhance...
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Background Nitrogen is a major limiting factor of plant growth in many ecosystems. Root nodule symbiosis (RNS) is one of the most efficient adaptations allowing plants to cope with nitrogen deficiency by establishing a symbiotic association with diazotrophic bacteria able to produce ammonium from atmospheric nitrogen. Nevertheless RNS is restricted to two groups of plants: legumes and Parasponi...
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Bacteria often infect their hosts from environmental sources, but little is known about how environmental and host-infecting populations are related. Here, phylogenetic clustering and diversity were investigated in a natural community of rhizobial bacteria from the genus Bradyrhizobium. These bacteria live in the soil and also form beneficial root nodule symbioses with legumes, including those ...
متن کاملEvolving ideas of legume evolution and diversity: a taxonomic perspective on the occurrence of nodulation.
Legumes evolved about 60 million years ago (Ma), and nodulation 58 Ma. Nonnodulation remains common in Caesalpinioideae, with smaller numbers in Mimosoideae and Papilionoideae. The first type of infection by bacteria may have been at junctions where lateral roots emerged, followed by formation of infection threads to confine bacteria and convey them to some cells in the developing nodule, where...
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