Abstract
Studies were carried out to investigate effect of application of growth-promoting rhizosphere bacteria of genus Pseudomonas in artificial contamination of agro-gray soil with copper in concentration above approximately permissible level on fractional composition of metal compounds in soil, weight of spring wheat plants and metal uptake by plants in pot experiment. To assess effect of bacteria on distribution of copper in soil fractions, inoculation with cultures P. fluorescens 20, P. fluorescens 21, and P. putida 23 was used. Wheat plants were grown up to booting stage in contamination with Cu(NO3)2·3H20 at rate of 300 mg Cu/kg of soil against background of NPK fertilization. Cu accumulation in fractions associated with organic matter, oxides and hydroxides of Fe and Mn and, to a lesser extent, with carbonates was established. Content of Cu in shoots and roots after combustion in mixture of HNO3 : HClO4 (2:1) and in soil fraction was determined by inductively coupled plasma emission-optical spectrometry. Bacteria rised plant resistance to high copper concentration and increased their weight by 13…24 %, reducing the phytotoxicity of metal. Positive effect of bacteria in copper contamination is due to increase in content of metal in roots (in 18…19 times relative to variant with copper contamination without bacteria application). Bacteria increased copper content mainly in specifically sorbed fraction associated with carbonates and in composition of ferruginous minerals, to lesser extent in organic fraction and decreased content of metal in residual fraction. Growth in copper uptake by plants from the soil by 19…30 % in application of bacteria corresponded to increase in its presence in soil in relatively mobile forms and decrease in the residual fraction.
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Claims 9
Claim · model-written summary
Pseudomonas bacteria increased spring wheat weight by 13–24% under copper contamination.
- Taxon
- spring wheat
Triticum aestivume0 - Treatment
- growth-promoting rhizosphere bacteria of genus Pseudomonase1
- Interactor
- Pseudomonas
Pseudomonase1symbiont - Outcome
- weighte2
- Direction
- increasede2
- Value
- 13…24 %e2
- Comparator
- copper contamination without bacteria applicatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weight of spring wheat plants and metal uptake by plants in pot experiment”
e1“application of growth-promoting rhizosphere bacteria of genus Pseudomonas”
e2“Bacteria rised plant resistance to high copper concentration and increased their weight by 13…24 %, reducing the phytotoxicity of metal”
e3“variant with copper contamination without bacteria application”
Claim · model-written summary
Pseudomonas bacteria reduced the phytotoxicity of copper for spring wheat.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- growth-promoting rhizosphere bacteria of genus Pseudomonase1
- Interactor
- PseudomonasPseudomonase1symbiont
- Outcome
- phytotoxicity of metale2
- Direction
- reducinge2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weight of spring wheat plants and metal uptake by plants in pot experiment”
e1“application of growth-promoting rhizosphere bacteria of genus Pseudomonas”
e2“Bacteria rised plant resistance to high copper concentration and increased their weight by 13…24 %, reducing the phytotoxicity of metal”
Claim · model-written summary
Bacteria increased copper content in spring wheat roots 18–19 times relative to copper contamination without bacteria.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- growth-promoting rhizosphere bacteria of genus Pseudomonase1
- Interactor
- PseudomonasPseudomonase1symbiont
- Outcome
- content of metal in rootse4
- Direction
- increasee4
- Value
- 18…19 timese4
- Comparator
- copper contamination without bacteria applicatione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weight of spring wheat plants and metal uptake by plants in pot experiment”
e1“application of growth-promoting rhizosphere bacteria of genus Pseudomonas”
e4“Positive effect of bacteria in copper contamination is due to increase in content of metal in roots (in 18…19 times relative to variant with copper contamination without bacteria application)”
Claim · model-written summary
Bacteria increased copper content in the specifically sorbed fraction associated with carbonates.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- Bacteriae5
- Interactor
- PseudomonasPseudomonase1symbiont
- Outcome
- specifically sorbed fraction associated with carbonatese5
- Direction
- increasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weight of spring wheat plants and metal uptake by plants in pot experiment”
e1“application of growth-promoting rhizosphere bacteria of genus Pseudomonas”
e5“Bacteria increased copper content mainly in specifically sorbed fraction associated with carbonates”
Claim · model-written summary
Bacteria increased copper content in the composition of ferruginous minerals, to a lesser extent in the organic fraction.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- Bacteriae5
- Interactor
- PseudomonasPseudomonase1symbiont
- Outcome
- composition of ferruginous mineralse6
- Direction
- increasede5
- Qualifier
- to lesser extent in organic fractione6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weight of spring wheat plants and metal uptake by plants in pot experiment”
e1“application of growth-promoting rhizosphere bacteria of genus Pseudomonas”
e5“Bacteria increased copper content mainly in specifically sorbed fraction associated with carbonates”
e6“and in composition of ferruginous minerals, to lesser extent in organic fraction”
Claim · model-written summary
Bacteria decreased copper content in the residual fraction.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- Bacteriae5
- Interactor
- PseudomonasPseudomonase1symbiont
- Outcome
- content of metal in residual fractione7
- Direction
- decreasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weight of spring wheat plants and metal uptake by plants in pot experiment”
e1“application of growth-promoting rhizosphere bacteria of genus Pseudomonas”
e5“Bacteria increased copper content mainly in specifically sorbed fraction associated with carbonates”
e7“decreased content of metal in residual fraction”
Claim · model-written summary
Bacteria increased copper uptake by plants from the soil by 19–30%.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- application of bacteriae3
- Interactor
- PseudomonasPseudomonase1symbiont
- Outcome
- copper uptake by plants from the soile3
- Direction
- Growthe3
- Value
- 19…30 %e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weight of spring wheat plants and metal uptake by plants in pot experiment”
e1“application of growth-promoting rhizosphere bacteria of genus Pseudomonas”
e3“Growth in copper uptake by plants from the soil by 19…30 % in application of bacteria”
Claim · model-written summary
Bacteria increased plant resistance to high copper concentration.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- Bacteriae2
- Interactor
- PseudomonasPseudomonase1symbiont
- Outcome
- plant resistance to high copper concentratione2
- Direction
- risede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weight of spring wheat plants and metal uptake by plants in pot experiment”
e1“application of growth-promoting rhizosphere bacteria of genus Pseudomonas”
e2“Bacteria rised plant resistance to high copper concentration and increased their weight by 13…24 %, reducing the phytotoxicity of metal”
Claim · model-written summary
Cu accumulated in fractions associated with organic matter, oxides and hydroxides of Fe and Mn.
- Taxon
- spring wheatTriticum aestivume0
- Outcome
- Cu accumulation in fractions associated with organic mattere6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weight of spring wheat plants and metal uptake by plants in pot experiment”
e6“Cu accumulation in fractions associated with organic matter, oxides and hydroxides of Fe and Mn”
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