Abstract
Three new strains of growth‐promoting N2‐fixing rhizobacteria, namely, Azospirillum brasilense SBR, Azotobacter chroococcum ZCR, and Klebsiella pneumoneae KPR, engineered for increased N2 fixation, and a commercial product H ALEX® were tested for growth promotion and as remediation agents against the soil‐borne plant pathogens Fusarium oxysporum f. sp. lycopersici, Rhizoctonia solani and Pythium sp., which attack cucumbers in the semiarid environment of Egypt. In vitro, the bacteria reduced the dry weight of mycelium of Fusarium by 90–96%, that of Rhizoctonia by 72–94%, Pythium by 71–95%, and Sclerotinia by 100%. Bioassaying the effect of HALEX on the pathogens showed a 56% decrease in the incidence of damping‐off and a 66% decrease in flowering at the age of 8 weeks. It showed an increase in emergence by 4%, photosynthetic area by 22%, shoot and root dry weights by 30% and 80%, respectively, and shoot N content by 89%. The term Sigmoid nutrition is introduced to describe the continuous and close provision of growth promoters and nutrients to the plant all along the Sigmoid growth curve.
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Claims 11
Claim · model-written summary
In vitro, the rhizobacteria reduced the dry weight of Fusarium mycelium by 90-96%.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- the bacteriae0
- Outcome
- dry weight of myceliume0
- Direction
- reducede0
- Value
- 90–96%e0
- Setting
- In vitroe0
FusariumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber”
e0“In vitro, the bacteria reduced the dry weight of mycelium of Fusarium by 90–96%”
Claim · model-written summary
In vitro, the rhizobacteria reduced the dry weight of Rhizoctonia mycelium by 72-94%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- the bacteriae0
- Interactor
- Rhizoctonia
.jpg?width=60)
Rhizoctoniae0pathogen - Outcome
- dry weight of myceliume0
- Direction
- reducede0
- Value
- 72–94%e0
- Setting
- In vitroe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“cucumber”
e0“In vitro, the bacteria reduced the dry weight of mycelium of Fusarium by 90–96%, that of Rhizoctonia by 72–94%”
Claim · model-written summary
In vitro, the rhizobacteria reduced the dry weight of Pythium mycelium by 71-95%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- the bacteriae0
- Outcome
- dry weight of myceliume0
- Direction
- reducede0
- Value
- 71–95%e0
- Setting
- In vitroe0
.jpg?width=60){kind=small}
PythiumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“cucumber”
e0“In vitro, the bacteria reduced the dry weight of mycelium of Fusarium by 90–96%, that of Rhizoctonia by 72–94%, Pythium by 71–95%”
Claim · model-written summary
In vitro, the rhizobacteria reduced the dry weight of Sclerotinia mycelium by 100%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- the bacteriae0
- Interactor
- Sclerotinia
Sclerotiniae0pathogen - Outcome
- dry weight of myceliume0
- Direction
- reducede0
- Value
- 100%e0
- Setting
- In vitroe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber”
e0“In vitro, the bacteria reduced the dry weight of mycelium of Fusarium by 90–96%, that of Rhizoctonia by 72–94%, Pythium by 71–95%, and Sclerotinia by 100%”
Claim · model-written summary
HALEX caused a 56% decrease in the incidence of damping-off caused by the pathogens.
- Taxon
- cucumberCucumis sativust0
- Treatment
- HALEXe0
- Interactor
- pathogense0pathogen
- Outcome
- incidence of damping‐offe0
- Direction
- decreasee0
- Value
- 56%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber”
e0“Bioassaying the effect of HALEX on the pathogens showed a 56% decrease in the incidence of damping‐off”
Claim · model-written summary
HALEX was associated with a 66% decrease in flowering at the age of 8 weeks.
- Taxon
- cucumberCucumis sativust0
- Treatment
- HALEXe0
- Outcome
- floweringe1
- Direction
- decreasee1
- Value
- 66%e1
- Qualifier
- at the age of 8 weekse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber”
e0“effect of HALEX”
e1“a 66% decrease in flowering at the age of 8 weeks”
Claim · model-written summary
HALEX increased emergence by 4%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber”
e0“effect of HALEX”
e1“It showed an increase in emergence by 4%”
Claim · model-written summary
HALEX increased photosynthetic area by 22%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- HALEXe0
- Outcome
- photosynthetic areae1
- Direction
- increasee1
- Value
- 22%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber”
e0“effect of HALEX”
e1“increase in emergence by 4%, photosynthetic area by 22%”
Claim · model-written summary
HALEX increased shoot dry weight by 30%.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- shoote1
- Treatment
- HALEXe0
- Outcome
- dry weightse1
- Direction
- increasee1
- Value
- 30%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber”
e0“effect of HALEX”
e1“increase in emergence by 4%, photosynthetic area by 22%, shoot and root dry weights by 30%”
Claim · model-written summary
HALEX increased root dry weight by 80%.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- roote1
- Treatment
- HALEXe0
- Outcome
- dry weightse1
- Direction
- increasee1
- Value
- 80%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber”
e0“effect of HALEX”
e1“increase in emergence by 4%, photosynthetic area by 22%, shoot and root dry weights by 30% and 80%”
Claim · model-written summary
HALEX increased shoot N content by 89%.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- shoote1
- Treatment
- HALEXe0
- Outcome
- N contente1
- Direction
- increasee1
- Value
- 89%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber”
e0“effect of HALEX”
e1“increase in emergence by 4%, photosynthetic area by 22%, shoot and root dry weights by 30% and 80%, respectively, and shoot N content by 89%”
The same questions in other papers
inoculation · Pythium · Cucumis sativus (cucumber)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
inoculation · Fusarium · Cucumis sativus (cucumber)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.