Abstract
Abstract The ability of Brevibacillus brevis to influence development of disease on tomato caused by Fusarium oxysporum f.sp. lycopersici was investigated using plants raised in Petri dish microcosms and in pots in the glasshouse. Development of symptoms on both microcosm‐ and glasshouse‐raised tomato plants was markedly reduced in co‐inoculations of F . oxysporum f.sp. lycopersici with B. brevis , compared with inoculations with the pathogen alone. Moreover, co‐inoculations resulted in significant growth boosting effects on the plants, with increases in plant height in microcosms and in total root lengths in glasshouse‐raised plants. In microcosm‐raised plants, the carrier used to inoculate seed with B. brevis , either carboxymethyl cellulose (CMC) or vermiculite, had no effect on the persistence of the biological control agent on roots in the absence of inoculation with the pathogen. By contrast, numbers of B. brevis recovered from the rhizosphere and rhizoplane of inoculated plants in microcosms were four orders of magnitude lower than in plants treated with B. brevis alone . Moreover, higher numbers of B. brevis CFU were re‐isolated from the rhizosphere of plants arising from CMC‐coated seed, than vermiculite‐coated seed. The carrier had no effect on disease control. Inhibition of conidial germination and germ‐tube extension of F. oxysporum f.sp. lycopersici by cell‐free filtrates of B. brevis cultures varied significantly depending on the culture medium used for suspension. These results indicate that B. brevis is a potential biological control agent for reducing the impact of F. oxysporum f.sp. lycopersici on tomato.
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Claims 7
Claim · model-written summary
Coinoculation reduced tomato disease symptoms in microcosms and glasshouse plants.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- co‐inoculations of F . oxysporum f.sp. lycopersici with B. brevise0
- Interactor
- F . oxysporum f.sp. lycopersici
Fusarium oxysporum f. sp. lycopersicie0pathogen - Second interactor
- B. brevisBrevibacillus brevise0biocontrol_agent
- Outcome
- Development of symptomse0
- Direction
- reducede0
- Comparator
- inoculations with the pathogen alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Development of symptoms on both microcosm‐ and glasshouse‐raised tomato plants was markedly reduced in co‐inoculations of F . oxysporum f.sp. lycopersici with B. brevis , compared with inoculations with the pathogen alone.”
Claim · model-written summary
Coinoculation significantly increased tomato plant height in microcosms.
Not reportedTaxonComparator
Verbatim
e0“co‐inoculations resulted in significant growth boosting effects on the plants, with increases in plant height in microcosms”
Claim · model-written summary
Coinoculation significantly increased tomato root length in the glasshouse.
- Treatment
- co‐inoculationse0
- Outcome
- total root lengthse0
- Direction
- increasese0
- Setting
- glasshouse‐raised plantse0
Not reportedTaxonComparator
Verbatim
e0“co‐inoculations resulted in significant growth boosting effects on the plants, with increases in plant height in microcosms and in total root lengths in glasshouse‐raised plants.”
Claim · model-written summary
Carrier choice did not affect B. brevis persistence on roots without pathogen inoculation.
- Treatment
- carboxymethyl cellulose (CMC)e0
- Interactor
- B. brevisBrevibacillus brevise0biocontrol_agent
- Outcome
- persistence of the biological control agent on rootse0
- Direction
- had no effecte0
- Comparator
- vermiculitee0
Not reportedTaxon
Verbatim
e0“the carrier used to inoculate seed with B. brevis , either carboxymethyl cellulose (CMC) or vermiculite, had no effect on the persistence of the biological control agent on roots in the absence of inoculation with the pathogen.”
Claim · model-written summary
B. brevis numbers in rhizosphere and rhizoplane were four orders lower with pathogen coinoculation.
- Treatment
- inoculated plantse0
- Interactor
- B. brevisBrevibacillus brevise0biocontrol_agent
- Outcome
- numbers of B. brevis recovered from the rhizosphere and rhizoplanee0
- Direction
- lowere0
- Value
- four orders of magnitudee0
- Comparator
- plants treated with B. brevis alonee0
Not reportedTaxon
Verbatim
e0“numbers of B. brevis recovered from the rhizosphere and rhizoplane of inoculated plants in microcosms were four orders of magnitude lower than in plants treated with B. brevis alone .”
Claim · model-written summary
CMC coated seed yielded more rhizosphere B. brevis colonies than vermiculite coated seed.
- Treatment
- CMC‐coated seede0
- Interactor
- B. brevisBrevibacillus brevise0biocontrol_agent
- Outcome
- numbers of B. brevis CFUe0
- Direction
- highere0
- Comparator
- vermiculite‐coated seede0
Not reportedTaxon
Verbatim
e0“higher numbers of B. brevis CFU were re‐isolated from the rhizosphere of plants arising from CMC‐coated seed, than vermiculite‐coated seed.”
Claim · model-written summary
Carrier choice had no effect on disease control.
Not reportedTaxonComparator
Verbatim
e0“The carrier had no effect on disease control.”
The same questions in other papers
inoculation · Fusarium oxysporum f. sp. lycopersici · Solanum lycopersicum (tomato)Positive and negative results
14 papers in the same direction as this paper · 11 in the opposite direction
- negative
- negative
- negative
22 papers more in this group
See all 26 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.