Abstract
The effect of Azospirillum brasilense Cd, Bacillus C–11–25, indole acetic acid, gibberellic acid and cytokinin on plant growth characteristics of two wheat ( Triticum aestivum L. emend Thell) cultivars was studied under laboratory and greenhouse conditions. Responses of wheat plants to bacterial inoculation were similar to those caused by the addition of gibberellic acid in growth pouches. Chester and Fielder wheat varieties differed in responses to the bacteria and hormone additions. When added to growth pouches, bacterial culture filtrates and dead bacterial cells caused plant growth responses similar to those caused by the addition of live cells. Bacteria and hormone additions resulted in increased permeability of Fielder wheat to 15 Nlabelled nitrate, and decreased nitrate permeability of Chester wheat. Bacterial inoculation of soil in pots caused 15 N isotope dilution in Fielder but not in Chester wheat. Hormone addition to pots caused isotope dilution in Chester wheat. It appeared that genetic differences between cultivars affected plant growth responses. The accuracy of estimates of N 2 fixation by associative bacteria based on 15 N isotope dilution calculations may be reduced if control plants differ in plant response to these bacteria.
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Claims 10
Claim · model-written summary
Responses of wheat to bacterial inoculation were similar to those caused by gibberellic acid addition in growth pouches.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- bacterial inoculatione1
- Interactor
- Azospirillum brasilense Cd
Azospirillum brasilensee0symbiont - Second interactor
- Bacillus C–11–25e0symbiont
- Outcome
- Responses of wheat plantse1
- Qualifier
- similare1
- Comparator
- addition of gibberellic acide1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“two wheat cultivars”
e0“Azospirillum brasilense Cd, Bacillus C–11–25”
e1“Responses of wheat plants to bacterial inoculation were similar to those caused by the addition of gibberellic acid in growth pouches. Chester and Fielder wheat varieties differed in responses to the bacteria and hormone additions”
Claim · model-written summary
Chester and Fielder wheat varieties differed in their responses to bacteria and hormone additions.
- Taxon
- wheatTriticum aestivume1
- Material
- Chester and Fieldere1
- Outcome
- responses to the bacteria and hormone additionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“two wheat cultivars”
e1“Responses of wheat plants to bacterial inoculation were similar to those caused by the addition of gibberellic acid in growth pouches. Chester and Fielder wheat varieties differed in responses to the bacteria and hormone additions”
Claim · model-written summary
Bacterial culture filtrates and dead bacterial cells caused plant growth responses similar to those caused by live cells.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- bacterial culture filtrates and dead bacterial cellse3
- Interactor
- Azospirillum brasilense CdAzospirillum brasilensee0symbiont
- Second interactor
- Bacillus C–11–25e0symbiont
- Outcome
- plant growth responsese3
- Qualifier
- similare3
- Comparator
- live cellse3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“two wheat cultivars”
e0“Azospirillum brasilense Cd, Bacillus C–11–25”
e3“When added to growth pouches, bacterial culture filtrates and dead bacterial cells caused plant growth responses similar to those caused by the addition of live cells”
Claim · model-written summary
Bacteria and hormone additions increased nitrate permeability of Fielder wheat to 15N-labelled nitrate.
- Taxon
- wheatTriticum aestivumt0
- Material
- Fieldere4
- Treatment
- Bacteria and hormone additionse4
- Outcome
- permeability of Fielder wheat to 15 Nlabelled nitratee4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“two wheat cultivars”
e4“Bacteria and hormone additions resulted in increased permeability of Fielder wheat to 15 Nlabelled nitrate, and decreased nitrate permeability of Chester wheat”
Claim · model-written summary
Bacteria and hormone additions decreased nitrate permeability of Chester wheat.
- Taxon
- wheatTriticum aestivumt0
- Material
- Chestere4
- Treatment
- Bacteria and hormone additionse4
- Outcome
- nitrate permeability of Chester wheate4
- Direction
- decreasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“two wheat cultivars”
e4“Bacteria and hormone additions resulted in increased permeability of Fielder wheat to 15 Nlabelled nitrate, and decreased nitrate permeability of Chester wheat”
Claim · model-written summary
Bacterial inoculation of soil in pots caused 15N isotope dilution in Fielder wheat.
- Taxon
- wheatTriticum aestivumt0
- Material
- Fieldere6
- Treatment
- Bacterial inoculation of soil in potse6
- Interactor
- Azospirillum brasilense CdAzospirillum brasilensee0symbiont
- Second interactor
- Bacillus C–11–25e0symbiont
- Outcome
- 15 N isotope dilutione6
- Setting
- potse6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“two wheat cultivars”
e0“Azospirillum brasilense Cd, Bacillus C–11–25”
e6“Bacterial inoculation of soil in pots caused 15 N isotope dilution in Fielder but not in Chester wheat. Hormone addition to pots caused isotope dilution in Chester wheat”
Claim · model-written summary
Bacterial inoculation of soil in pots did not cause 15N isotope dilution in Chester wheat.
- Taxon
- wheatTriticum aestivumt0
- Material
- Chestere6
- Treatment
- Bacterial inoculation of soil in potse6
- Interactor
- Azospirillum brasilense CdAzospirillum brasilensee0symbiont
- Second interactor
- Bacillus C–11–25e0symbiont
- Outcome
- 15 N isotope dilutione6
- Setting
- potse6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“two wheat cultivars”
e0“Azospirillum brasilense Cd, Bacillus C–11–25”
e6“Bacterial inoculation of soil in pots caused 15 N isotope dilution in Fielder but not in Chester wheat. Hormone addition to pots caused isotope dilution in Chester wheat”
Claim · model-written summary
Hormone addition to pots caused isotope dilution in Chester wheat.
- Taxon
- wheatTriticum aestivumt0
- Material
- Chestere6
- Treatment
- Hormone addition to potse6
- Outcome
- isotope dilutione6
- Setting
- potse6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“two wheat cultivars”
e6“Bacterial inoculation of soil in pots caused 15 N isotope dilution in Fielder but not in Chester wheat. Hormone addition to pots caused isotope dilution in Chester wheat”
Claim · model-written summary
Genetic differences between wheat cultivars appear to affect their growth responses to the bacteria.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- plant growth responsese5
- Qualifier
- genetic differences between cultivarse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“two wheat cultivars”
e5“genetic differences between cultivars affected plant growth responses”
Claim · model-written summary
The accuracy of 15N-based N2 fixation estimates by associative bacteria may be reduced if control plants respond differently to the bacteria.
- Taxon
- wheatTriticum aestivumt0
- Interactor
- associative bacteriae7symbiont
- Outcome
- accuracy of estimates of N 2 fixatione7
- Direction
- reducede7
- Comparator
- control plantse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“two wheat cultivars”
e7“The accuracy of estimates of N 2 fixation by associative bacteria based on 15 N isotope dilution calculations may be reduced if control plants differ in plant response to these bacteria”
The same questions in other papers
inoculation · Azospirillum brasilense · Triticum aestivum (wheat)Positive and negative results
3 papers in the same direction as this paper · 21 in the opposite direction
- positive
- positive
- positive
21 papers more in this group
See all 25 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.