Relationships between pasture legumes, rhizobacteria and nodule bacteria in heavy metal polluted mine waste of SW Sardinia

Safronova, Vera I.; Piluzza, Giovanna; Zinovkina, Nadezhda Y.; Kimeklis, Anastasiia K.; Belimov, Andrey A.; Bullitta, S.

doi:10.1007/s13199-012-0207-x

Cited by 31 publications

(19 citation statements)

References 45 publications

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“…Besides the positive effects of V. paradoxus 5C-2 on the K and Na balance, the bacterium also enhanced the uptake of Ca, Mg and P (Table 2). Similarly, Lotus edulis plants inoculated with V. paradoxus 5C-2 and grown in heavy metal contaminated soil had increased Ca, Mg and P content and increased shoot accumulation of several nutrient elements including K (Safronova et al 2012), which may be simply due to improved root growth. Improved uptake of K and other nutrients by the plants inoculated with V. paradoxus 5C-2 may enhance photosynthesis.…”

Section: Discussionmentioning

confidence: 96%

“…ACC deaminase activity of V. paradoxus 5C-2 in the presence of toxic NaCl concentrations was determined by monitoring the amount of a-ketobytyrate (aKB) generated enzymatically via hydrolysis of ACC (Saleh and Glick 2001) as previously described (Safronova et al 2012). The protein concentration of disrupted cell suspensions was determined by the method of Bradford (1976) using the Bio-Rad protein reagent (Bio-Rad Laboratory, Hercules, CA, USA).…”

Section: Bacterial Culture and Salt Tolerancementioning

confidence: 99%

“…Although these bacteria can increase stomatal conductance (Jiang et al 2012) and maintain higher photosynthetic ability (F v /F m ratio) of plants grown under optimal conditions (Gamalero et al 2008), their impacts on stomatal and non-stomatal limitation of photosynthesis of salinised plants are not clear. These rhizobacteria can also maintain ion homeostasis by improving plant N, P and K uptake (Jiang et al 2012;Safronova et al 2012) or enhancing the K + : Na + ratio (Nadeem et al 2009;Chang et al 2014). However, previous measurements of the ionic status of salinised plants inoculated with ACC-deaminase containing PGPR have simply measured foliar Na + and K + concentrations (Nadeem et al 2007(Nadeem et al , 2010, without considering elemental flows within the entire plant.…”

Section: Introductionmentioning

confidence: 99%

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Rhizosphere bacteria containing 1-aminocyclopropane-1- carboxylate deaminase increase growth and photosynthesis of pea plants under salt stress by limiting Na+ accumulation

Wang

Dodd

Belimov

et al. 2016

Functional Plant Biol.

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163

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Abstract. Although plant salt tolerance has been improved by soil inoculation with rhizobacteria containing the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase (which metabolises ACC, the immediate precursor of the phytohormone ethylene), it is not always clear whether ion homeostasis and plant water relations are affected. When pea (Pisum sativum L. cv. Alderman) was grown with 70 and 130 mM NaCl, the ACC-deaminase containing rhizobacterium Variovorax paradoxus 5C-2 increased total biomass by 25 and 54% respectively. Nutrient flow modelling showed that V. paradoxus 5C-2 increased K uptake and root to shoot K flow, but decreased Na flow and increased Na deposition in roots. Thus, shoot K + : Na + ratio increased following V. paradoxus 5C-2 inoculation. At 70 and 130 mM NaCl, rhizobacterial inoculation decreased stomatal resistance by 14 and 31% and decreased xylem balancing pressure by 7 and 21% respectively. Furthermore, rhizobacterial inoculation improved photosynthetic efficiency (F v /F m ) by 12 and 19% and increased maximal electron transport rate (ETR) by 18 and 22% at 70 and 130 mM NaCl respectively. Thus V. paradoxus 5C-2 mitigates salt stress by improving water relations, ion homeostasis and photosynthesis of pea plants, and may provide an economic means of promoting growth of plants exposed to salt stress.Additional keywords: ion homeostasis, maximal electron transport rate, nutrient flow modelling, photosynthetic efficiency, water relations.

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Section: Discussionmentioning

confidence: 96%

Section: Bacterial Culture and Salt Tolerancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rhizosphere bacteria containing 1-aminocyclopropane-1- carboxylate deaminase increase growth and photosynthesis of pea plants under salt stress by limiting Na+ accumulation

Wang

Dodd

Belimov

et al. 2016

Functional Plant Biol.

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163

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“…viciae (Antipchuk et al 2002;Pereira et al 2006;Wani and Khan 2013) and other nodule bacteria such as Bradyrhizobium sp. (Ahmad et al 2001) and Sinorhizobium meliloti (Safronova et al 2012;Guefrachi et al 2013).…”

Section: Sensitivity Of Symbiosis Between Pea and Nodule Bacteria To mentioning

confidence: 99%

“…Here, we tested shoot growth response of several varieties to elevated soil Cd concentration (45 mg Cd kg −1 ) and to inoculation with PGPR strain V. paradoxus 5C-2. This Сd-tolerant bacterium was initially characterized as an active rhizosphere colonizer and growth promoter of Indian mustard seedlings treated with Cd ) and pasture legumes grown in HM-contaminated soil (Safronova et al 2012). Accordingly, a high and similar root colonization ability by V. paradoxus 5C-2 was observed in the present pot experiment with Indian mustard (variety 3939) grown in uncontaminated soil (2.8± 0.7×10 6 CFU g −1 DW) and Cd-supplemented soil (4.7±0.6×10 6 CFU g −1 DW).…”

Section: Relationship Between Intraspecific Variability Of Indian Musmentioning

confidence: 99%

Role of Plant Genotype and Soil Conditions in Symbiotic Plant-Microbe Interactions for Adaptation of Plants to Cadmium-Polluted Soils

Belimov

Puhalsky

Safronova

et al. 2015

Water Air Soil Pollut

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We highlighted some of the key problems associated with the use of beneficial microorganisms for improving adaptation of plants to soils, polluted with heavy metals (HMs), especially Cd. Inoculation of pea line SGE and its Cd-tolerant mutant SGECd t with nodule bacteria Rhizobium leguminosarum bv. viciae demonstrated that nodulation process may be disturbed at Cd concentrations below threshold toxicity levels for each partner and the plant genotype plays a major role in nodulation under Cd stress. A comparative mathematical analysis of available information about Cd tolerance, accumulation of HMs (Cd, Cr, Cu, Ni, Pb, Sr and Zn), response to mycorrhizal fungus Glomus sp. and 15 phenotypic traits of 99 pea varieties revealed that (1) the Cd-sensitive varieties were more efficient in exploring the protective potential of symbiosis to compensate their deficit in Cd tolerance and (2) correlations between the studied traits exist and can be helpful for selection of plant-microbe systems adapted to polluted soils. In pot experiment with 11 varieties of Indian mustard, the plant growth-promoting effect of rhizobacterium Variovorax paradoxus 5C-2 negatively correlated with Cd tolerance and shoot Cd concentration of the plants grown in Cd-supplemented soil. In an outdoor pot experiment, inoculation of willow with the ectomycorrhizal fungus Pisolithus tinctorius and a cocktail of rhizobacteria stimulated root exudation, decreased soil pH and increased Cd mobilization in soil and Cd uptake by plants, but decreased plant growth at a moderate contamination level (25 mg Cd kg −1 ). Opposite effects were observed in highly contaminated soil (77 mg Cd kg −1 ). We propose a preliminary systematic framework of interactions between these factors that determine the success of microbial inoculation aimed at improving crop performance on HM-polluted soils or enhancing phytoremediation.

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Phytoremediation

Glick¹

2020

Beneficial Plant-Bacterial Interactions

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Relationships between pasture legumes, rhizobacteria and nodule bacteria in heavy metal polluted mine waste of SW Sardinia

Cited by 31 publications

References 45 publications

Rhizosphere bacteria containing 1-aminocyclopropane-1- carboxylate deaminase increase growth and photosynthesis of pea plants under salt stress by limiting Na+ accumulation

Rhizosphere bacteria containing 1-aminocyclopropane-1- carboxylate deaminase increase growth and photosynthesis of pea plants under salt stress by limiting Na+ accumulation

Role of Plant Genotype and Soil Conditions in Symbiotic Plant-Microbe Interactions for Adaptation of Plants to Cadmium-Polluted Soils

Phytoremediation

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