Cadmium-tolerant plant growth-promoting bacteria associated with the roots of Indian mustard (Brassica juncea L. Czern.)

Белимов, А. А.; Hontzeas, Nikos; Сафронова, В.И.; Demchinskaya, Svetlana V.; Piluzza, Giovanna; Bullitta, S.; Glick, Bernard R.

doi:10.1016/j.soilbio.2004.07.033

Cited by 762 publications

(369 citation statements)

References 32 publications

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“…Microbial inoculation has also been observed to produce several organic acids and phytochelatins ensuring easy availability of metals to plants (Kamnev et al 2005), which in turn brings down the pH of soil towards acidic nature and thereby enhances metal bioavailability (Kunito et al 1998). Besides, the microbial inoculation is noticed to protect the plant against the toxic effects of heavy metals and other abiotic stresses (Belimov et al 2005). In the present study as well, the inoculation with P. fluorescens and T. harzianum enhanced the tolerance index and metal uptake (measured in terms of phytoextraction coefficient) of B. juncea apart from producing significantly more biomass (Egamberdiyeva 2007).…”

Section: Discussionsupporting

confidence: 64%

Phytoextraction of soil cadmium and zinc by microbes-inoculated Indian mustard (Brassica juncea)

Chauhan

Rai

2009

Journal of Plant Interactions

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A pot experiment was carried out to evaluate the effect of Pseudomonas fluorescens and Trichoderma harzianum inoculation on the uptake of zinc (Zn) and cadmium (Cd) by Indian mustard (Brassica juncea) from the soil having three different concentrations of Zn (300, 600, 900 mg/kg) and Cd (5, 10, 15 mg/kg) separately. Microbial inoculation resulted in significantly better plant growth, available metal content and their uptake than control (without microbes). Available Zn was enhanced, ca.1.6-and 1.4-fold and Cd ca. 2.5-and 1.8-fold, by P. fluorescens and T. harzianum respectively. P. fluorescens resulted in an increase in Zn uptake by 113.9, 51.9 and 58.4% and T. harzianum by 42.6, 32.1 and 33.9% over control from soils having 300, 600 and 900 mg Zn, respectively, while of the corresponding results for Cd were 110.2, 48.9 and 58.1% with P. fluorescens and 42.6, 30.9 and 33.4% with T. harzianum from soil having 5, 10 and 15 mg Cd, respectively, after 90 days of treatment. In general the rate of metal uptake was higher during the initial 30 days and declined later.

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Section: Discussionsupporting

confidence: 64%

Phytoextraction of soil cadmium and zinc by microbes-inoculated Indian mustard (Brassica juncea)

Chauhan

Rai

2009

Journal of Plant Interactions

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“…Huia seeds were surface-sterilized and aseptically placed on wetted filter paper. Seedlings' length was measured after incubation of the closed Petri dishes for 7 days at 22°C (Belimov et al 2005). The vigor index was determined as follows: % of germination 9 seedling length (Luo et al 2011).…”

Section: Seedling Length Assay In Presence Of Zn and CDmentioning

confidence: 99%

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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“…Screening for Metabolic Properties ACC deaminase activity was determined for all of the isolated strains according to the protocol described by Belimov et al [14]. The ability of bacteria to produce auxin was measured using the Salkowsky reaction [15].…”

Section: Isolation Of the Bacterial Strains From Soilmentioning

confidence: 99%

Survey of Plant Drought-Resistance Promoting Bacteria from Populus euphratica Tree Living in Arid Area

Wang

Ouyang

et al. 2014

Indian J Microbiol

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Two hundred and thirty-two bacterial strains were isolated from the rhizospheric soil of Populus euphratica which is the dominant tree living in extreme arid regions in northwest China. Some strains with plant growth-promoting bacteria related metabolic characteristics were able to promote drought resistance in plants after inoculation. Ten strains with the greatest effects increased the dry weight of wheat shoots from 0.5 to 34.4 %, and the surface area of the root systems from 12.56 to 212.17 % compared to the control after drought treatment whereas no obvious promoting effect was observed in normal water conditions. These 10 strains were identified to be of the genera Pseudomonas, Bacillus, Stenotrophomonas and Serratia by 16S rRNA (rrs) gene sequence alignment. Among these strains, Serratia sp. 1-9 and Pseudomonas sp. 5-23 were the two most effective strains. Both of them produced auxin and the production increased significantly when cultured under simulated drought conditions which are inferred to be the most plausible mechanism for their plant growth-promoting effect under drought stress.

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Cadmium-tolerant plant growth-promoting bacteria associated with the roots of Indian mustard (Brassica juncea L. Czern.)

Cited by 762 publications

References 32 publications

Phytoextraction of soil cadmium and zinc by microbes-inoculated Indian mustard (Brassica juncea)

Phytoextraction of soil cadmium and zinc by microbes-inoculated Indian mustard (Brassica juncea)

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

Survey of Plant Drought-Resistance Promoting Bacteria from Populus euphratica Tree Living in Arid Area

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