Nodulation and growth of common bean (Phaseolus vulgaris) under water deficiency

Mnasri, Bacem; Aouani, Mohamed Elarbi; Mhamdi, Ridha

doi:10.1016/j.soilbio.2007.01.030

Cited by 66 publications

(39 citation statements)

References 30 publications

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“…The high contribution of the rhizobial partner to the variance of symbiosis effectiveness indices even under osmotic stress suggests that the selection of effective strains could lead to the enhancement of chickpea production, depending on symbiotic nitrogen fixation, mainly in nitrogen-poor soils. Similar reports have been made for some other cultivated legumes (Zahran 1999;Serraj et al 1999;Zacarias et al 2004;Mnasri et al 2007). …”

Section: Resultssupporting

confidence: 86%

“…This result confirms reports mentioning that the symbiosis response to environmental stress depends on their initial growth potential (Zahran 1999;Zacarias et al 2004;Tejera et al 2004). Moreover, it was suggested that among effective rhizobia, those showing the highest tolerance level in the free-living phase allowed a best tolerance for symbiotic association (Mnasri et al 2007 To simplify the interpretation of data given in Table 1 and to confirm the conclusion, we performed a principal component analysis (PCA) on associations, taking into account six variables (Fig. 2).…”

Section: Resultsmentioning

confidence: 97%

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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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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 97%

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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“…However, the selection of superior strains could improve nitrogen fixation at moderate soil moisture within the range of the host plant (Mhadhbi et al 2008(Mhadhbi et al , 2009b. Mnasri et al (2007) showed that hyper salttolerant strains of rhizobia are more competitive and more effective in nitrogen fixation under drought stress than less tolerant strains. The strain A5 is very efficient with all studied M. truncatula lines (Badri et al 2007), which promises its usefulness to promote host plant growth under osmotic stress conditions.…”

Section: Protein Profiles and Mass Fingerprinting Under Salt Stressmentioning

confidence: 99%

Salt tolerance of a Sinorhizobium meliloti strain isolated from dry lands: growth capacity and protein profile changes

et al. 2010

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Sinorhizobium meliloti strain A5, isolated from root nodules of Medicago truncatula growing spontaneously in Tunisian dry lands, showed better growth performance under different sodium chloride concentrations than the standard reference strain RCR2011. Strain A5 has the ability to grow even at 684 mM NaCl. Two-dimensional (2D) electrophoretic analysis of the salt effect on proteome profiles revealed the greatest change on the 4th day of exposure. The halotolerant strain A5 showed more upregulated protein spots than the standard RCR2011 strain (23% of the analyzed protein spots vs only 10% in strain RCR2011) and fewer downregulated protein spots (28% vs 69%). Proteins over-expressed in salty medium as determined by Matrix-assisted laser desorption ionization time-of-flight mass spectrometry for both strains were identified as an outer-membrane protein, an L-amino-acid binding periplasmic transporter protein, a 50S ribosomal protein (L25), a heat shock protein, and a putative oxidoreductase protein. Down-regulated proteins were identified as a putative iron-binding periplasmic transporter protein, a putative lipoprotein precursor, a putative spermidine/ putrescine-binding periplasmic transporter protein, and a putative amino-acid binding ABC transporter protein.The profile of strain A5 showed higher over-expression of an oxidoreductase and a heat-shock protein, and specifically an induction of a putative oligopeptide ABC transporter ATP-binding protein.

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“…The effect of water stress in BNF was intensively studied in grain legumes such as Cicer arietinum L., Glycine max L. or Phaseolus vulgaris L. (Fellows et al 1987, Purcell et al 2004, Mnasri et al 2007 and to a lesser extent, in tree (Mrema et al 1997) and forage legumes (Engin and Sprent 1973). In this work, the effects of water deficiency in BNF of three native rhizobial isolates from forage legume Biserrula pelecinus (AjuPt16, SafPt6 and SafPt12) (Vicente et al 2009) were investigated under three watering levels (R1, well-watered conditions; R2, mild-water stress; and R3, severe water-stress) applied during the B. pelecinus vegetative stage.…”

Section: Resultsmentioning

confidence: 99%

Biological nitrogen fixation of Biserrula pelecinus L. under water deficit

Vicente¹,

Pérez‐Fernández²,

Pereira³

et al. 2012

PLANT SOIL ENVIRON

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The present work studied the effects of water deficiency conditions on the biological nitrogen fixation of three native rhizobia (SafPt12, SafPt6, and AjuPt16) isolated from Biserrula pelecinus L., and a reference strain Mesorhizobium ciceri biovar biserrulae. In terms of plant-water status, B. pelecinus showed typical signs of drought avoidance strategies such as reducing the aboveground development (i.e. reduction in leaf surface area and increase in root/ shoot ratio) in detriment of a better developed root system. Dry-matter production and nitrogen content of the aboveground biomass decreased with the increasing levels of drought stress, as well as nodulation and symbiotic nitrogen fixation, for all the tested isolates. The parameters investigated suggested that SafPt12 was the most successful native rhizobia to withstand severe water conditions without compromising nitrogen fixation demands.

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Nodulation and growth of common bean (Phaseolus vulgaris) under water deficiency

Cited by 66 publications

References 30 publications

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

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

Salt tolerance of a Sinorhizobium meliloti strain isolated from dry lands: growth capacity and protein profile changes

Biological nitrogen fixation of Biserrula pelecinus L. under water deficit

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