Abstract
Fennel crop is a horticultural plant susceptible to several soil-borne fungal pathogens responsible for yield losses. The control of fungal diseases occurring on fennel crops is very difficult with conventional and/or integrated means; although several chemical fungicides are able to contain specific fungal diseases, they are not registered for fennel crops. The intensive use of some fungicides causes public concern over the environment and human health. The main aims of this study were to assess the ability of a strain of Streptomyces albidoflavus CARA17 to inhibit the growth of fungal soil-borne pathogens, and to protect fennel plants against severe fungal soil-borne pathogens such as Athelia rolfsii, Fusarium oxysporum, Plectosphaerella ramiseptata, Sclerotinia sclerotiorum and Verticillium dahliae. This study confirmed that the CARA17 strain has been able to inhibit the mycelium growth of pathogens in vitro conditions with significant inhibition degrees, where S. sclerotiorum resulted in being the most controlled. The strain CARA17 was also able to significantly protect the fennel seedlings against fungal soil-borne pathogens used in vivo conditions, where the treatment with an antagonist strain by dipping resulted in being more effective at limiting the disease severity of each fungal soil-borne pathogen. Moreover, any treatment with the CARA17 strain, carried out by dipping or after transplanting, produced benefits for the biomass of fennel seedlings, showing significant effects as a promoter of plant growth. Finally, the results obtained showed that CARA17 is a valid strain as a biocontrol agent (BCA) against relevant fungal soil-borne pathogens, although further studies are recommended to confirm these preliminary results. Finally, this study allowed for first time worldwide the association of Plectosphaerella ramiseptata with fennel plants as a severe pathogen.
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Claims 7
Claim · model-written summary
CARA17 inhibited pathogen mycelial growth in vitro.
- Taxon
- Fennel
_-_Parc_Natural_de_s'Albufera%2C_Spain_2022-04-18_(02).jpg?width=60)
Anethum foeniculumt0 - Treatment
- CARA17 straine0
- Outcome
- mycelium growth of pathogense0
- Direction
- inhibite0
- Setting
- in vitro conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_-_Parc_Natural_de_s'Albufera%2C_Spain_2022-04-18_(02).jpg?width=500)
Verbatim
e0“CARA17 strain has been able to inhibit the mycelium growth of pathogens in vitro conditions with significant inhibition degrees”
t0“Fennel Plants”
Claim · model-written summary
S. sclerotiorum was the most controlled pathogen.
- Taxon
- FennelAnethum foeniculumt0
- Interactor
- S. sclerotiorum
Sclerotinia sclerotiorume0pathogen - Outcome
- S. sclerotiorume0
- Direction
- most controllede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S. sclerotiorum resulted in being the most controlled”
t0“Fennel Plants”
Claim · model-written summary
CARA17 significantly protected fennel seedlings from soil-borne pathogens in vivo.
- Taxon
- fennelAnethum foeniculume0
- Treatment
- CARA17e0
- Outcome
- protect the fennel seedlingse0
- Direction
- protecte0
- Setting
- in vivo conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The strain CARA17 was also able to significantly protect the fennel seedlings against fungal soil-borne pathogens used in vivo conditions”
Claim · model-written summary
Dipping with CARA17 more effectively limited disease severity.
- Taxon
- FennelAnethum foeniculumt0
- Treatment
- antagonist strain by dippinge0
- Outcome
- disease severitye0
- Direction
- limitinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment with an antagonist strain by dipping resulted in being more effective at limiting the disease severity of each fungal soil-borne pathogen”
t0“Fennel Plants”
Claim · model-written summary
CARA17 dipping increased fennel seedling biomass.
- Taxon
- fennelAnethum foeniculume0
- Treatment
- CARA17 strain, carried out by dippinge0
- Outcome
- biomass of fennel seedlingse0
- Direction
- benefitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“any treatment with the CARA17 strain, carried out by dipping or after transplanting, produced benefits for the biomass of fennel seedlings, showing significant effects as a promoter of plant growth”
Claim · model-written summary
CARA17 after transplanting increased fennel seedling biomass.
- Taxon
- fennelAnethum foeniculume0
- Treatment
- CARA17 strain, carried out by dipping or after transplantinge0
- Outcome
- biomass of fennel seedlingse0
- Direction
- benefitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“any treatment with the CARA17 strain, carried out by dipping or after transplanting, produced benefits for the biomass of fennel seedlings, showing significant effects as a promoter of plant growth”
Claim · model-written summary
Plectosphaerella ramiseptata was associated with fennel as a severe pathogen for the first time.
- Taxon
- fennelAnethum foeniculume0
- Interactor
- Plectosphaerella ramiseptataPlectosphaerella ramiseptatae0pathogen
- Outcome
- association of Plectosphaerella ramiseptata with fennel plants as a severe pathogene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“first time worldwide the association of Plectosphaerella ramiseptata with fennel plants as a severe pathogen”
The same questions in other papers
application · growth · Anethum foeniculum (fennel)Positive and negative results
9 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
7 papers more in this group
See all 11 papers →application · disease · Anethum foeniculum (fennel)Results agree
2 papers in the same direction as this paper
- positive
- positive
transplanting · growth · Anethum foeniculum (fennel)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.