Two bacterial strains isolated from a Zn-polluted soil enhance plant growth and mycorrhizal efficiency under Zn-toxicity

Vivas, A.; Bíró, Borbála; Ruíz-Lozano, Juan Manuel; Barea, J. M.; Azcón‐Aguilar, Concepción

doi:10.1016/j.chemosphere.2005.06.053

Cited by 182 publications

(52 citation statements)

References 42 publications

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“…In fact, ACCdeaminase is of great importance when plants face high levels of metals, since the presence of these elements is normally encountered as a stress and plants respond by synthesizing more levels of ethylene, which in turn results in reduced plant growth. Although a number of studies have demonstrated that bacterial inoculation in the rhizosphere of plant species may increase the efficiency of phytoremediation, since plant growth and survival in metal-contaminated soils are improved (He et al 2009;Ma et al 2009a;Madhaiyan et al 2007;Vivas et al 2006) to the best of our knowledge, this is the first research that reports on the potential of R. erythropolis (B1) to increase plant growth in Zn-and Cdcontaminated soils.…”

Section: Influence Of Pgpr Inoculation On Plant Growth In Presence Ofmentioning

confidence: 98%

Rhizobacteria isolated from a metal-polluted area enhance plant growth in zinc and cadmium-contaminated soil

Pereira

Barbosa

Castro

2014

Int. J. Environ. Sci. Technol.

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In this work, we evaluated the ability of rhizobacteria isolated from a metal-contaminated site to produce plant growth-promoting substances, such as indole-3-acetic acid (IAA), ammonia, hydrogen cyanide, siderophores and extracellular enzymes, to solubilize phosphate and for 1-aminocyclopropane-1-carboxylate (ACC)-deaminase activity, while assessing their capacity to enhance Trifolium repens growth. The rhizobacteria that better performed were used as bioinoculants for plants grown in zinc-and cadmium-spiked soils. Rhizobacteria were inoculated onto white clover seedlings growing in 250 and 500 mg kg -1 of zinc and in 10 and 30 mg kg -1 of cadmium-spiked soils and plant traits determined. The available and exchangeable rhizosphere metal concentrations were analyzed. Twenty rhizobacteria stimulated white clover growth under axenic conditions. Overall, strains Rhodococcus erythropolis EC 34, Achromobacter sp. 1AP2 and Microbacterium sp. 3ZP2 increased clover biomass in the absence and in presence of metals; however, in soils with 250 mg kg -1 of zinc, bacterial inoculation did not enhance plant biomass. Biomass enhancement may be related to the multiple bacterial promoting traits, especially the production of high levels of IAA and siderophores and the activity of ACC-deaminase. To the best of our knowledge, this is the first study reporting the potential of R. erythropolis to increase plant growth in metal-contaminated soils. In general, strains Microbacterium sp. 3ZP2 and Arthrobacter sp. EC 10 enhanced the available and exchangeable metal concentrations in rhizosphere showing their potential to improve phytoremediation efficiency. This work clearly indicates that rhizobacteria are promising for the development of bioinoculants useful for phytoremediation of polluted soils.

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Section: Influence Of Pgpr Inoculation On Plant Growth In Presence Ofmentioning

confidence: 98%

Rhizobacteria isolated from a metal-polluted area enhance plant growth in zinc and cadmium-contaminated soil

Pereira

Barbosa

Castro

2014

Int. J. Environ. Sci. Technol.

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“…Microorganisms play an important role in the environmental fate of toxic metals including Cd with physicochemical mechanisms affecting transformations between soluble and insoluble phases (Vivas et al 2006), although they cannot degrade Cd in soil. Such mechanisms are important components of natural biogeochemical cycles for metals.…”

Section: Microorganisms Induced By Root Secretion and CD Bioavailabilmentioning

confidence: 99%

Root excretion and plant tolerance to cadmium toxicity - a review

Dong¹,

Mao²,

Zhang³

et al. 2007

Plant Soil Environ.

199

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Significant quantities of Cd have been added to soils globally due to various anthropogenic activities, posing a serious threat to safe food production and human health. Rhizosphere, as an important interface of soil and plant, plays a significant role in the agro-environmental system. This article presents a review of relationship between root excretion and microorganisms and plant resistance to Cd toxicity and possible mechanisms. Root exudates markedly altered in species and quantity under Cd stress. Root exudates can affect Cd absorption by plants through changing the physical and chemical characteristics of rhizospheres. The influence of root exudates on Cd bioavailability and toxicity may include modifying the rhizosphere pH and Eh, chelating/complexing and depositing with Cd ions, and altering the community construction, the numbers and activities of rhizospheric microbes. In this paper, the methods to reduce the transfer of Cd in soil-plant system by adjusting rhizosphere environment are discussed, and some aspects are also proposed that should be emphasized in the future research work.

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“…The microbial activity changed depending on the available Ni in soil and these treatments show increased P uptake in Trifolium plants by more than ten times (Ni I and Ni II). Vivas et al (2006b) reported Brevibacillus sp. along with co-inoculation of indigenous AMF isolated from Zn contaminated soil reduced Zn uptake and promoted growth in Trifolium repens plant.…”

Section: Co-inoculation Effect Of Amf and Pgprmentioning

confidence: 99%

Synergistic Effects of Arbuscular Mycorrhizal Fungi and Plant Growth Promoting Rhizobacteria for Sustainable Agricultural Production

Krishnamoorthy¹,

Joe²,

Kim³

et al. 2011

Korean Journal of Soil Science and Fertilizer

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Soil microorganisms play a major role in improving soil fertility and plant health. Symbiotic arbuscular mycorrhizal fungi (AMF) form a key component of the soil microbial populations. AMF form a mutualistic association with the host plant and exert a positive influence on its growth and nutrient uptake. The establishment of mycorrhizal symbioses with the host plant can positively be influenced by plant growth promoting rhizobacteria through various mechanisms such as increased spore germination and hyphal permeability in plant roots. Though there are evidences that combined interactions between AMF and PGPR can promote the plant growth however mechanisms of these interactions are poorly understood. Better understanding of the interactions between AMF and other microorganisms is necessary for maintaining soil fertility and enhancing crop production. This paper reviews current knowledge concerning the interactions between AMF and PGPR with plants and discusses on enhanced nutrient availability, biocontrol, abiotic stress tolerance and phytoremediation in sustainable agriculture.

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Two bacterial strains isolated from a Zn-polluted soil enhance plant growth and mycorrhizal efficiency under Zn-toxicity

Cited by 182 publications

References 42 publications

Rhizobacteria isolated from a metal-polluted area enhance plant growth in zinc and cadmium-contaminated soil

Rhizobacteria isolated from a metal-polluted area enhance plant growth in zinc and cadmium-contaminated soil

Root excretion and plant tolerance to cadmium toxicity - a review

Synergistic Effects of Arbuscular Mycorrhizal Fungi and Plant Growth Promoting Rhizobacteria for Sustainable Agricultural Production

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