Abstract
The effects of the pathogenic fungus Fusarium oxysporum f. sp. radicis-lycopersici and of the bacterial biocontrol strain Pseudomonas fluorescens WCS365, and of both microbes, on the amounts and composition of root exudate components of tomato plants grown in a gnotobiotic stonewool substrate system were studied. Conditions were selected under which introduction of F. oxysporum f. sp. radicis-lycopersici caused severe foot and root rot, whereas inoculation of the seed with P. fluorescens WCS365 decreased the percentage of diseased plants from 96 to 7%. This is a much better disease control level than was observed in potting soil. Analysis of root exudate revealed that the presence of F. oxysporum f. sp. radicis-lycopersici did not alter the total amount of organic acids, but that the amount of citric acid decreased and that of succinic acid increased compared with the nontreated control. In contrast, in the presence of the P. fluorescens biocontrol strain WCS365, the total amount of organic acid increased, mainly due to a strong increase of the amount of citric acid, whereas the amount of succinic acid decreased dramatically. Under biocontrol conditions, when both microbes are present, the content of succinic acid decreased and the level of citric acid was similar to that in the nontreated control. The amount of sugar was approximately half that of the control sample when either one of the microbes was present alone or when both were present. Analysis of the interactions between the two microbes grown together in sterile tomato root exudate showed that WCS365 inhibited multiplication of F. oxysporum f. sp. radicis-lycopersici, whereas the fungus did not affect the number of CFU of the bacterium.
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Claims 12
Claim · model-written summary
The presence of F. oxysporum f. sp. radicis-lycopersici did not alter the total amount of organic acids in tomato root exudate.
- Taxon
- tomato
Solanum lycopersicume1 - Treatment
- presence of F. oxysporum f. sp. radicis-lycopersicie2
- Interactor
- F. oxysporum f. sp. radicis-lycopersici
Fusarium oxysporum f. sp. radicis-lycopersicie2pathogen - Outcome
- total amount of organic acidse2
- Direction
- did not altere2
- Comparator
- nontreated controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“root exudate components of tomato plants grown in a gnotobiotic stonewool substrate system”
e2“the presence of F. oxysporum f. sp. radicis-lycopersici did not alter the total amount of organic acids, but that the amount of citric acid decreased and that of succinic acid increased compared with the nontreated control”
Claim · model-written summary
F. oxysporum f. sp. radicis-lycopersici decreased the amount of citric acid in tomato root exudate compared with the nontreated control.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- presence of F. oxysporum f. sp. radicis-lycopersicie2
- Interactor
- F. oxysporum f. sp. radicis-lycopersiciFusarium oxysporum f. sp. radicis-lycopersicie2pathogen
- Outcome
- amount of citric acide2
- Direction
- decreasede2
- Comparator
- nontreated controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“root exudate components of tomato plants grown in a gnotobiotic stonewool substrate system”
e2“the presence of F. oxysporum f. sp. radicis-lycopersici did not alter the total amount of organic acids, but that the amount of citric acid decreased and that of succinic acid increased compared with the nontreated control”
Claim · model-written summary
F. oxysporum f. sp. radicis-lycopersici increased the amount of succinic acid in tomato root exudate compared with the nontreated control.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- presence of F. oxysporum f. sp. radicis-lycopersicie2
- Interactor
- F. oxysporum f. sp. radicis-lycopersiciFusarium oxysporum f. sp. radicis-lycopersicie2pathogen
- Outcome
- succinic acide2
- Direction
- increasede2
- Comparator
- nontreated controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“root exudate components of tomato plants grown in a gnotobiotic stonewool substrate system”
e2“the presence of F. oxysporum f. sp. radicis-lycopersici did not alter the total amount of organic acids, but that the amount of citric acid decreased and that of succinic acid increased compared with the nontreated control”
Claim · model-written summary
P. fluorescens WCS365 increased the total amount of organic acid in tomato root exudate.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- P. fluorescens biocontrol strain WCS365e3
- Interactor
- P. fluorescens biocontrol strain WCS365
.JPG?width=60)
Pseudomonas fluorescense3biocontrol_agent - Outcome
- total amount of organic acide3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e1“root exudate components of tomato plants grown in a gnotobiotic stonewool substrate system”
e3“in the presence of the P. fluorescens biocontrol strain WCS365, the total amount of organic acid increased, mainly due to a strong increase of the amount of citric acid, whereas the amount of succinic acid decreased dramatically”
Claim · model-written summary
P. fluorescens WCS365 caused a strong increase in the amount of citric acid in tomato root exudate.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- P. fluorescens biocontrol strain WCS365e3
- Interactor
- P. fluorescens biocontrol strain WCS365Pseudomonas fluorescense3biocontrol_agent
- Outcome
- amount of citric acide3
- Direction
- strong increasee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“root exudate components of tomato plants grown in a gnotobiotic stonewool substrate system”
e3“in the presence of the P. fluorescens biocontrol strain WCS365, the total amount of organic acid increased, mainly due to a strong increase of the amount of citric acid, whereas the amount of succinic acid decreased dramatically”
Claim · model-written summary
P. fluorescens WCS365 decreased the amount of succinic acid dramatically in tomato root exudate.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- P. fluorescens biocontrol strain WCS365e3
- Interactor
- P. fluorescens biocontrol strain WCS365Pseudomonas fluorescense3biocontrol_agent
- Outcome
- amount of succinic acide3
- Direction
- decreased dramaticallye3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“root exudate components of tomato plants grown in a gnotobiotic stonewool substrate system”
e3“in the presence of the P. fluorescens biocontrol strain WCS365, the total amount of organic acid increased, mainly due to a strong increase of the amount of citric acid, whereas the amount of succinic acid decreased dramatically”
Claim · model-written summary
With both microbes present, the succinic acid content of tomato root exudate decreased.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- when both microbes are presente4
- Outcome
- content of succinic acide4
- Direction
- decreasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“root exudate components of tomato plants grown in a gnotobiotic stonewool substrate system”
e4“Under biocontrol conditions, when both microbes are present, the content of succinic acid decreased and the level of citric acid was similar to that in the nontreated control”
Claim · model-written summary
With both microbes present, the citric acid level of tomato root exudate was similar to the nontreated control.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- when both microbes are presente4
- Outcome
- level of citric acide4
- Direction
- similare4
- Comparator
- nontreated controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“root exudate components of tomato plants grown in a gnotobiotic stonewool substrate system”
e4“Under biocontrol conditions, when both microbes are present, the content of succinic acid decreased and the level of citric acid was similar to that in the nontreated control”
Claim · model-written summary
Sugar amount in tomato root exudate was about half that of the control when either microbe was present alone or both were present.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- when either one of the microbes was present alonee5
- Outcome
- amount of sugare5
- Direction
- approximately halfe5
- Comparator
- the control samplee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“root exudate components of tomato plants grown in a gnotobiotic stonewool substrate system”
e5“The amount of sugar was approximately half that of the control sample when either one of the microbes was present alone or when both were present”
Claim · model-written summary
P. fluorescens WCS365 inhibited multiplication of F. oxysporum f. sp. radicis-lycopersici in sterile tomato root exudate.
- Taxon
- tomatoSolanum lycopersicume6
- Treatment
- WCS365e6
- Interactor
- F. oxysporum f. sp. radicis-lycopersiciFusarium oxysporum f. sp. radicis-lycopersicie6pathogen
- Second interactor
- WCS365e6biocontrol_agent
- Outcome
- multiplication of F. oxysporum f. sp. radicis-lycopersicie6
- Direction
- inhibitede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Analysis of the interactions between the two microbes grown together in sterile tomato root exudate showed that WCS365 inhibited multiplication of F. oxysporum f. sp. radicis-lycopersici, whereas the fungus did not affect the number of CFU of the bacterium”
Claim · model-written summary
F. oxysporum f. sp. radicis-lycopersici did not affect the number of CFU of WCS365 in sterile tomato root exudate.
- Taxon
- tomatoSolanum lycopersicume6
- Treatment
- the funguse6
- Interactor
- WCS365e6biocontrol_agent
- Outcome
- number of CFU of the bacteriume6
- Direction
- did not affecte6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Analysis of the interactions between the two microbes grown together in sterile tomato root exudate showed that WCS365 inhibited multiplication of F. oxysporum f. sp. radicis-lycopersici, whereas the fungus did not affect the number of CFU of the bacterium”
Claim · model-written summary
Inoculating tomato seed with P. fluorescens WCS365 decreased the percentage of diseased plants from 96% to 7%.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- inoculation of the seed with P. fluorescens WCS365e7
- Interactor
- P. fluorescens WCS365Pseudomonas fluorescense7biocontrol_agent
- Outcome
- percentage of diseased plantse7
- Direction
- decreasede7
- Value
- from 96 to 7%e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“root exudate components of tomato plants grown in a gnotobiotic stonewool substrate system”
e7“inoculation of the seed with P. fluorescens WCS365 decreased the percentage of diseased plants from 96 to 7%”
The same questions in other papers
inoculation · molecular: metabolites · Solanum lycopersicum (tomato)Positive and negative results
7 papers in the same direction as this paper · 36 in the opposite direction
- positive
- positive
- positive
40 papers more in this group
See all 44 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.