A novel symbiovar (aegeanense) of the genus <i>Ensifer</i> nodulates <i>Vigna unguiculata</i>

Tampakaki, Anastasia P.; Fotiadis, Christos; Ntatsi, Georgia; Savvas, Dimitrios

doi:10.1002/jsfa.8281

Cited by 16 publications

(5 citation statements)

References 77 publications

(165 reference statements)

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“…Although cowpea is considered a promiscuous species capable of establishing efficient symbiosis with diverse symbiotic bacteria [38], the most efficient symbiotic relationships are achieved with Bradyrhizobium species [39], especially in nonalkaline soils [12]. In the current study, the indigenous Bradyrhizobium strain VULI11 [40] was used as inoculum, which exhibited high N 2 -fixing ability for cowpea, as confirmed by the results of E1. Nevertheless, in E3 the %Ndfa was similar in inoculated and noninoculated cowpea plants, which indicates that the inoculum applied during E1 was capable of persisting and spreading out throughout the field trial area, and was likely present at high populations in the soil in all plots one year later in E3.…”

Section: Discussionsupporting

confidence: 61%

Nitrogen Nutrition Optimization in Organic Greenhouse Tomato Through the Use of Legume Plants as Green Manure or Intercrops

et al. 2019

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In the present study, in addition to farmyard manure (FYM), cowpea was applied as green manure and faba bean as an intercrop in an organic greenhouse tomato crop, aiming to increase the levels of soil N. Three experiments (E1, E2, E3) were carried out, in which legumes were either noninoculated or inoculated with rhizobia alone or together with plant growth, promoting rhizobacteria. Inoculation of legumes with rhizobia considerably increased N2 fixation in E1 but had no impact on N2 fixation in E2 and E3. In E1, the application of cowpea decreased yield because it imposed a stronger nematode infection as the cowpea plants acted as a good host for Meloidogyne. However, in E2 and E3 the nematode infection was successfully controlled and the legumes significantly increased the tomato yield when inoculated in E2, irrespective of legume inoculation in E3. The total N concentration in the tomato plant tissues was significantly increased by legume application in E2 and E3, but not in E1. These results show that legumes applied as green manure can successfully complement N supply via FYM in organic greenhouse tomato, while legume inoculation with rhizobia can increase the amounts of nitrogen provided to the crop via green manure.

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Section: Discussionsupporting

confidence: 61%

Nitrogen Nutrition Optimization in Organic Greenhouse Tomato Through the Use of Legume Plants as Green Manure or Intercrops

et al. 2019

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“…associated with Arachis hypogaea (peanut) [ 94 , 95 ], Bradyrhizobium , and Ensifer spp. associated with G. max (soybean) [ 97 , 98 , 99 , 100 ] and Vigna unguiculata (cowpea) [ 110 , 112 ], Rhizobium spp. associated with P. vulgaris (common bean) [ 103 , 105 , 106 ] and Mesorhizobium associated with Lotus corniculatus (bird’s-foot trefoil) [ 19 , 20 ].…”

Section: Lateral Transfer Of Symbiosis Genesmentioning

confidence: 99%

Horizontal Transfer of Symbiosis Genes within and Between Rhizobial Genera: Occurrence and Importance

Andrews

Meyer

James

et al. 2018

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Rhizobial symbiosis genes are often carried on symbiotic islands or plasmids that can be transferred (horizontal transfer) between different bacterial species. Symbiosis genes involved in horizontal transfer have different phylogenies with respect to the core genome of their ‘host’. Here, the literature on legume–rhizobium symbioses in field soils was reviewed, and cases of phylogenetic incongruence between rhizobium core and symbiosis genes were collated. The occurrence and importance of horizontal transfer of rhizobial symbiosis genes within and between bacterial genera were assessed. Horizontal transfer of symbiosis genes between rhizobial strains is of common occurrence, is widespread geographically, is not restricted to specific rhizobial genera, and occurs within and between rhizobial genera. The transfer of symbiosis genes to bacteria adapted to local soil conditions can allow these bacteria to become rhizobial symbionts of previously incompatible legumes growing in these soils. This, in turn, will have consequences for the growth, life history, and biogeography of the legume species involved, which provides a critical ecological link connecting the horizontal transfer of symbiosis genes between rhizobial bacteria in the soil to the above-ground floral biodiversity and vegetation community structure.

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“…Fortunately, this crop has a great ability to synthetize N through the symbiotic interaction with rhizobia. Adaptation of cowpea includes coevolution with indigenous rhizobia associated with strains of the species Ensifer fredii that were able to nodulate and fix N in cowpea but not in soybean and common bean ( Tampakaki et al, 2017 ). These authors conclude that the Ensifer isolates may constitute a new symbiovar for which they propose the name “aegeanense”.…”

Section: Eco-physiological Adaptive Traits Of Bean and Cowpea In The mentioning

confidence: 99%

Warm Season Grain Legume Landraces From the South of Europe for Germplasm Conservation and Genetic Improvement

et al. 2018

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Currently, there is a high concern from consumers regarding food quality, with emphasis on the origin of food sources. We here review the current situation of beans (Phaseolus spp.) and cowpea (Vigna unguiculata (L.) Walp.) landraces in the South of Europe focusing on morpho-agronomic and genetic diversity and physiological adaptation to the different agrosystems, including the symbiotic association with rhizobia. Despite the reduction in the production and consumption of grain legumes in Southern Europe, the variability of common bean, runner bean and cowpea landraces in this region is adequately preserved ex situ in germplasm banks and in breeder collections in Portugal, Spain, Italy and Greece; however, on-farm (in situ) conservation in isolated areas mainly in gardens and small fields for farmers own consumption and local markets is not guaranteed. This variability can be used for the genetic improvement of varieties, which will result in environmental-friendly improved legumes for a sustainable production in the South of Europe as well as in other regions of the World.

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A novel symbiovar (aegeanense) of the genus Ensifer nodulates Vigna unguiculata

Cited by 16 publications

References 77 publications

Nitrogen Nutrition Optimization in Organic Greenhouse Tomato Through the Use of Legume Plants as Green Manure or Intercrops

Nitrogen Nutrition Optimization in Organic Greenhouse Tomato Through the Use of Legume Plants as Green Manure or Intercrops

Horizontal Transfer of Symbiosis Genes within and Between Rhizobial Genera: Occurrence and Importance

Warm Season Grain Legume Landraces From the South of Europe for Germplasm Conservation and Genetic Improvement

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