Abstract
Four detergents were tested as selective C sources for the plant growth-promoting rhizobacteria Pseudomonas aeruginosa 7NSK2 and Pseudomonas fluorescens ANP15. CO-720 (Igepal CO-720) or DOS (dioctyl sulfosuccinate), applied at 0.2% to the soil, increased the number of detergent-adapted, inoculated strains by almost 1.5 log units after 25 days, accounting for virtually the entire increase in total bacteria. The same dose of Tween 80 or N-laurylsarcosine, on the other hand, increased the indigenous populations by almost 2.5 log units, with only minor increases in the number of detergent-adapted inoculated strains. When CO-720 or DOS was initially supplied, the number of detergent-adapted 7NSK2 organisms was about 2 log units higher after 3 months of incubation than for the detergent-unadapted strain. This better survival resulted in a significantly higher root colonization of maize in a pot experiment with soil inoculation, with a significantly (P <= 0.05) higher shoot dry weight (18 to 33%). In a first field experiment with rhizosphere inoculation of 1-month-old maize plants, no effects on the height of two maize cultivars could be observed 1 month after inoculation. In a second field experiment, leaf and stem dry weights of yellow mustard and grass dry weight were increased in the treatments with seed and soil inoculation of the detergent-adapted 7NSK2 in combination with CO-720 application by, respectively, 7 to 8%, 19 to 23%, and 20 to 31%, although only the increases in grass dry weight were statistically significant at P <= 0.1. To some extent, 7NSK2 and DOS application also positively affected the mineral content of yellow mustard.
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Claims 10
Claim · model-written summary
CO-720 or DOS increased inoculated adapted strains after 25 days.
- Treatment
- CO-720 (Igepal CO-720) or DOS (dioctyl sulfosuccinate), applied at 0.2% to the soile0
- Outcome
- number of detergent-adapted, inoculated strainse0
- Direction
- increasede0
- Value
- almost 1.5 log unitse0
Not reportedTaxonComparator
Verbatim
e0“CO-720 (Igepal CO-720) or DOS (dioctyl sulfosuccinate), applied at 0.2% to the soil, increased the number of detergent-adapted, inoculated strains by almost 1.5 log units after 25 days”
Claim · model-written summary
Tween 80 or N-laurylsarcosine increased indigenous bacteria.
- Treatment
- Tween 80 or N-laurylsarcosinee0
- Outcome
- indigenous populationse0
- Direction
- increasede0
- Value
- almost 2.5 log unitse0
Not reportedTaxonComparator
Verbatim
e0“The same dose of Tween 80 or N-laurylsarcosine, on the other hand, increased the indigenous populations by almost 2.5 log units”
Claim · model-written summary
CO-720 or DOS improved survival of adapted 7NSK2 after three months.
Verbatim
e0“When CO-720 or DOS was initially supplied, the number of detergent-adapted 7NSK2 organisms was about 2 log units higher after 3 months of incubation than for the detergent-unadapted strain”
Claim · model-written summary
Better survival raised maize root colonization significantly.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This better survival resulted in a significantly higher root colonization of maize in a pot experiment with soil inoculation”
Claim · model-written summary
Inoculation increased maize shoot dry weight by 18 to 33%.
- Treatment
- soil inoculatione1
- Interactor
- Pseudomonas aeruginosa 7NSK2
Pseudomonas aeruginosat0symbiont - Outcome
- shoot dry weighte0
- Direction
- highere0
- Value
- 18 to 33%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with a significantly (P <= 0.05) higher shoot dry weight (18 to 33%)”
t0“Pseudomonas aeruginosa 7NSK2”
e1“root colonization of maize in a pot experiment with soil inoculation”
Claim · model-written summary
Rhizosphere inoculation had no observed effect on maize cultivar height.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a first field experiment with rhizosphere inoculation of 1-month-old maize plants, no effects on the height of two maize cultivars could be observed 1 month after inoculation”
Claim · model-written summary
Adapted 7NSK2 with CO-720 increased yellow mustard leaf dry weight by 7 to 8%.
- Taxon
- yellow mustard
Sinapis albae0 - Treatment
- seed and soil inoculation of the detergent-adapted 7NSK2 in combination with CO-720 applicatione0
- Outcome
- leaf and stem dry weightse0
- Direction
- increasede0
- Value
- 7 to 8%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf and stem dry weights of yellow mustard and grass dry weight were increased in the treatments with seed and soil inoculation of the detergent-adapted 7NSK2 in combination with CO-720 application by, respectively, 7 to 8%, 19 to 23%, and 20 to 31%”
Claim · model-written summary
Adapted 7NSK2 with CO-720 increased yellow mustard stem dry weight by 19 to 23%.
- Taxon
- yellow mustardSinapis albae0
- Treatment
- seed and soil inoculation of the detergent-adapted 7NSK2 in combination with CO-720 applicatione0
- Outcome
- stem dry weightse0
- Direction
- increasede0
- Value
- 19 to 23%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf and stem dry weights of yellow mustard and grass dry weight were increased in the treatments with seed and soil inoculation of the detergent-adapted 7NSK2 in combination with CO-720 application by, respectively, 7 to 8%, 19 to 23%, and 20 to 31%”
Claim · model-written summary
Adapted 7NSK2 with CO-720 significantly increased grass dry weight by 20 to 31%.
- Taxon
- grasse0
- Treatment
- seed and soil inoculation of the detergent-adapted 7NSK2 in combination with CO-720 applicatione0
- Outcome
- grass dry weighte0
- Direction
- increasede0
- Value
- 20 to 31%e0
Not reportedComparator
Verbatim
e0“grass dry weight were increased in the treatments with seed and soil inoculation of the detergent-adapted 7NSK2 in combination with CO-720 application by, respectively, 7 to 8%, 19 to 23%, and 20 to 31%, although only the increases in grass dry weight were statistically significant at P <= 0.1”
Claim · model-written summary
7NSK2 and DOS positively affected yellow mustard mineral content to some extent.
- Taxon
- yellow mustardSinapis albae0
- Treatment
- 7NSK2 and DOS applicatione0
- Outcome
- mineral contente0
- Qualifier
- To some extente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To some extent, 7NSK2 and DOS application also positively affected the mineral content of yellow mustard”
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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.