Competition for nodule formation between introduced strains of Mesorhizobium ciceri and the native populations of rhizobia nodulating chickpea (Cicer arietinum) in Tunisia

Romdhane, Samir Ben; Tajini, Fatma; Trabelsi, Mustapha; Aouani, Mohamed Elarbi; Mhamdi, Ridha

doi:10.1007/s11274-006-9325-z

Cited by 44 publications

(41 citation statements)

References 35 publications

(28 reference statements)

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“…Inoculation of the EEL 7802 strain resulted in higher N fixation in the aerial part than in the non-inoculated plants and plants without N fertilization. It was found that the number and mass of nodules of the inoculated pea plants had no correlation with pea grain production, which is in accordance with the observation that the efficiency of N fixation and the competitive capacity of a strain are not necessarily correlated (Romdhane, 2007).…”

Section: Resultssupporting

confidence: 81%

Symbiotic efficiency of pea (Pisum sativum) rhizobia association under field conditions

Muniz¹,

Costa²,

Sá³

et al. 2017

Afr. J. Agric. Res.

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The objective of this study was to evaluate the symbiotic efficiency of rhizobia under field conditions for peas (Pisum sativum L.). Ten treatments were evaluated and divided into eight strains of rhizobia and two uninoculated strains as controls (with and without the addition of mineral N). The variables analyzed were: Nodulation, dry mass of the aerial part, total N of the aerial section, pea production and symbiotic efficiency. The inoculated rhizobia strains had effects on the number and mass of nodules, accumulated N in the aerial part and pea grains production. The strain EEL7802 presented the highest symbiotic efficiency for peas. The inoculation may allow cost reduction due to the equivalence with nitrogen fertilization. Studies in other soil types are needed to confirm the efficiency of this strain.

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Section: Resultssupporting

confidence: 81%

Symbiotic efficiency of pea (Pisum sativum) rhizobia association under field conditions

Muniz¹,

Costa²,

Sá³

et al. 2017

Afr. J. Agric. Res.

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“…In this study, results were obtained using a strain that showed limited symbiotic potentialities (SMCP) that was maintained in our study because in Tunisian soils most of the rhizobia nodulating chickpea belong to the Sinorhizobium genus Ben Rhomdhane et al 2007b). However, to avoid that our conclusions about strain effect might be dependent on the behaviour of one strain only, we analysed the variance without the SMCP strain.…”

Section: Resultsmentioning

confidence: 99%

“…Sinorhizobium meliloti (SMCP) strain from LILM (Laboratoire Interactions Légumineuses Microorganismes, Centre de Biotechnologie de Borj Cedria, Tunisia) collection. This S. meliloti strain was used, since previous works Ben Rhomdhane et al 2007b) showed that in Tunisia, the mainstream of the chickpea nodule isolates were assigned to the Sinorhizobium genus.…”

Section: Biological Materialsmentioning

confidence: 99%

Symbiotic effectiveness and response to mannitol-mediated osmotic stress of various chickpea–rhizobia associations

Mhadhbi

Jebara

Zitoun

et al. 2007

World J Microbiol Biotechnol

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Thirty-six symbiotic associations involving six chickpea cultivars against six rhizobial strains were evaluated for symbiotic performance and responses to osmotic stress applied by mannitol (50 mM) in aerated hydroponic cultures. Analyses in different symbioses were focused on biomass production, nodulation, nitrogen fixation, and their modulation under osmotic stress conditions, as well as expression of nodular antioxidant enzymes. Mesorhizobium ciceri reference (835) and local (CMG6) strains, as well as the local (C 11 ) M. mediterraneum allowed the best symbiotic efficiency for all chickpea cultivars. The osmotic stress induces severe decrease ranging 30-50% in aerial biomass and 50-70% for nitrogen fixation. Nevertheless, plants inoculated with M. ciceri (835) and M. mediterraneum (C 11 ) preserve a relatively high growth (4 g plant -1 ) with nitrogen-fixing activity (25 lmols h -1 plant -1 ). The bacterial partner was the most important factor of variance of the analysed parameters in osmotic stress or physiological conditions where it gets to 60-85%. The strains allowing the best competent symbioses were proposed for field assays. Under osmotic stress, nodular peroxidase (POX) and ascorbate peroxidase (APX) activities were significantly enhanced. The increase of POX and APX was inversely correlated with the inhibition of aerial biomass production (p = 0.05) and nitrogen-fixing capacity (p = 0.01), suggesting a protective role of these enzymes in nodules. Superoxide dismutase (SOD) was also activated in stressed nodules. However, the spectacular decrease in catalase (CAT) activity discounts its involvement in osmotic stress response.

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“…To increase the chances of getting efficient strains, the structure and the symbiotic capabilities of indigenous rhizobium populations and their competitiveness should be assessed [83][84][85][86]. This lies in the fact that local strains can be more efficient than exogenous strains that were previously proven to be highly efficient on other legume crops [84,87].…”

Section: Improvement Of Kersting's Groundnut Productivity: Potentialmentioning

confidence: 99%

Potential of Kersting’s groundnut [Macrotyloma geocarpum (Harms) Maréchal & Baudet] and prospects for its promotion

Ayenan

Ezin

2016

Agric & Food Secur

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Kersting's groundnut is a tropical crop, highly nutritious, adapted to drought-prone areas. The crop is neglected both by researchers and by policy makers. This paper aimed at providing relevant information on the current status of the crop and the prospects to promote its improvement and production. To this end, available papers addressing any of the following aspect: distribution, nutritional value, cropping systems, post-harvest processing, usages, value chains, conservation status, genetic diversity and improvement of Kersting's groundnut were reviewed. In West Africa, the crop provides substantial income for rural population. Kersting's groundnut has several medicinal uses and cultural values as well. However, because of its intensive labor requirement, low yield and non-availability of improved varieties, its cultivation is declining and it is even disappearing gradually in some growing areas. The promotion of the crop's value chains is an option for reversing the declining trend in Kersting's groundnut cultivation. In recent years, some progress has been recorded in the collection, characterization and ex situ conservation of the crop. Thus, there are currently about 100 accessions conserved in various gene banks in Benin, Ghana, France and Belgium. This is still insufficient as compared to the genetic resources available in ex situ for most of the grown legume crops. To cope with this, extensive germplasm collection and their systematic characterization and evaluation coupled with new generation genomic tools need to be undertaken. For this purpose, genomic resources developed for Kersting's groundnut-related species will be valuable assets. The exploitation of genomic resources will enable the development of core and mini-core collections for conservation and breeding purposes. In addition, the use of genomic resources will speed up Kersting's groundnut breeding programs. Furthermore, the genetic base of the crop is extremely narrow and there is a need to broaden it for substantial genetic gain in breeding programs. For this purpose, mutation induction has been proposed as technique to increase variability in the Kersting's groundnut germplasm. Invest in Kersting's groundnut research is key to ensure the conservation and exploit the potential of the crop.

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Competition for nodule formation between introduced strains of Mesorhizobium ciceri and the native populations of rhizobia nodulating chickpea (Cicer arietinum) in Tunisia

Cited by 44 publications

References 35 publications

Symbiotic efficiency of pea (Pisum sativum) rhizobia association under field conditions

Symbiotic efficiency of pea (Pisum sativum) rhizobia association under field conditions

Symbiotic effectiveness and response to mannitol-mediated osmotic stress of various chickpea–rhizobia associations

Potential of Kersting’s groundnut [Macrotyloma geocarpum (Harms) Maréchal & Baudet] and prospects for its promotion

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