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The legume host and soil environment play a major role to establish effective symbiosis with diverse rhizobia for growth promotion and nodule formation. Aim of this study was to access morpho-physiology, distribution and phylogenetic position of rhizobia nodulating cowpea from South Africa and Mozambique. The results showed that isolate were highly diverse in their appearance on yeast mannitol agar plates. The test isolates also showed an ability to produce IAA at concentrations ranging from 0.64 to 56.46 μg.ml-1 and to solubilise phosphorus at levels from 0 to 3.55 index. Canonical correspondence analysis (CCA) showed that soil pH and mineral nutrients could significantly influence bradyrhizobial distribution. Analysis of BOX-PCR placed the isolates in eight major clusters with 0.01 to 1.00 similarity coefficient with resulted 45 unique BOX-types. Isolates' phylogenetic analyses based on 16S rRNA, atpD, glnII, gyrB and recA gene sequences showed distinct novel evolutionary lineages within the genus Bradyrhizobium, with some of them being closely related to Bradyrhizobium kavangense, B. subterraneum and B. pachyrhizi. Furthermore, symbiotic genes' phylogenies suggested that the isolates' sym loci probably relate to isolates' geographical origin. The results indicated that geographical origin did affect the isolates' phylogenetic placement and could be the basis for allopatric speciation.
This article was published in the following journal.
Name: FEMS microbiology ecology
Cowpea (Vigna unguiculata [L.] Walp.) is a major crop for worldwide food and nutritional security, especially in sub-Saharan Africa, that is resilient to hot and drought-prone environments. An assembl...
Cowpea (Vigna unguiculata L.) is a legume species that considerably benefits from inoculation with nitrogen fixing bacteria of the genus Bradyrhizobium. One of the strains recommended for inoculation ...
Zombi pea (Vigna vexillata (L.) A. Rich) is an underutilized crop belonging to the genus Vigna. Two domesticated forms of zombi pea are cultivated as crop plants; seed and tuber forms. The cultivated ...
Several species of the Gypsophila genus are endemic to the Iberian Peninsula, including gypsophytes of particular ecological, evolutionary and biochemical interest, and taxa that have undergone both s...
In nature, plants are simultaneously challenged by biotic and abiotic stresses. However, little is known about the effects of these combined stresses for most crops. This work aimed to evaluate the re...
Corn-soy vitamin and mineral fortified blended foods (FBFs) are primarily used for food aid, although sorghum and cowpea may be suitable alternative FBF commodities. The objective of the M...
This pilot study is designed to investigate differences in folate-related genes (single nucleotide polymorphisms) and their relationship to the species of folate present on red blood cells...
Little data is currently available on the type of pathogen responsible for respiratory infections following drowning. Many environmental germs present in seawater are described as difficul...
The SHAPES-Captivity study seeks to identify metagenomic components of the intestinal microbiome shared by human beings and captive great apes living in proximity and in direct, daily cont...
To identify side effects of Sofosbuvir/ Daclatasvir treatment regimen of chronic HCV GT-4 infection. - To assess the occurrence and the prevalence of RAVs in patients with treatment fa...
Plant genus in the pea family (Fabaceae).
A species of gram-negative, aerobic bacteria that is a fast-growing and soybean-nodulating innoculant.
A preconceived judgment made without adequate evidence and not easily alterable by presentation of contrary evidence.
A genus of plant viruses of the family COMOVIRIDAE in which the bipartite genome is encapsidated in separate icosahedral particles. Mosaic and mottle symptoms are characteristic, and transmission is exclusively by leaf-feeding beetles. Cowpea mosaic virus is the type species.
A way of providing nursing care that is guided by the integration of the best available scientific knowledge with nursing expertise. This approach requires nurses to critically assess relevant scientific data or research evidence, and to implement high-quality interventions for their nursing practice.
Within medicine, nutrition (the study of food and the effect of its components on the body) has many different roles. Appropriate nutrition can help prevent certain diseases, or treat others. In critically ill patients, artificial feeding by tubes need t...
Polymerase Chain Reaction (PCR)
PCR (Polymerase Chain Reaction) uses the ability of DNA polymerase (enzymes that create DNA molecules by assembling nucleotides, the building blocks of DNA. These enzymes are essential to DNA replication and usually work in pairs to create two ident...