Abstract
Biological control of seed-borne pathogens has shown to enhance germination and physiological quality of seeds. The objectives of this study were to evaluate the in vitro antagonistic effect of five Trichoderma harzianum isolates (CEN287, CEN288, CEN289, CEN290, and CEN316) against Fusarium oxysporum f. sp. phaseoli (Foxy) and test its potential use in seed treatment. Initially, pathogen and antagonists were grown in paired cultures at 25ºC, from which samples were assessed using scanning electron microscopy (SEM). Then, clean or Foxy-infected seeds were treated with conidial suspension of the antagonists. Percent of Foxy-infected seeds and normal seedlings were evaluated at seven and nine days of incubation, respectively. All but one Trichoderma isolate (CEN290) inhibited Foxy mycelial growth. SEM analysis revealed that only one Trichoderma isolate (CEN287) showed parasitic interaction with Foxy. Two isolates (CEN287 and CEN316) significantly reduced the Foxy incidence and enhanced seed germination, though less effective than the fungicide mixture (carboxin + thiram). A principal component analysis indicated the importance of volatile metabolites in reducing Foxy incidence on common bean seeds. CEN287 Trichoderma harzianum isolate formed a single group due to its increase in germination rate of Foxyinfected seeds.
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Claims 6
Claim · model-written summary
All tested Trichoderma isolates except CEN290 inhibited Fusarium mycelial growth in paired cultures.
- Taxon
- common bean
Phaseolus vulgarist0 - Treatment
- Trichoderma isolatee0
- Interactor
- Foxye0pathogen
- Outcome
- Foxy mycelial growthe0
- Direction
- inhibitede0
- Comparator
- CEN290e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All but one Trichoderma isolate (CEN290) inhibited Foxy mycelial growth.”
t0“common bean”
Claim · model-written summary
CEN287 showed parasitic interaction with Fusarium.
- Taxon
- common beanPhaseolus vulgarist0
- Material
- CEN287e0
- Interactor
- Foxye0pathogen
- Outcome
- parasitic interaction with Foxye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only one Trichoderma isolate (CEN287) showed parasitic interaction with Foxy.”
t0“common bean”
Claim · model-written summary
CEN287 and CEN316 significantly reduced Fusarium incidence on common bean seeds.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- CEN287 and CEN316e0
- Interactor
- Foxye0pathogen
- Outcome
- Foxy incidencee0
- Direction
- reducede0
- Comparator
- fungicide mixture (carboxin + thiram)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two isolates (CEN287 and CEN316) significantly reduced the Foxy incidence and enhanced seed germination, though less effective than the fungicide mixture (carboxin + thiram).”
t0“common bean”
Claim · model-written summary
CEN287 and CEN316 enhanced seed germination, with lower efficacy than the fungicide mixture.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- CEN287 and CEN316e0
- Outcome
- seed germinatione0
- Direction
- enhancede0
- Comparator
- fungicide mixture (carboxin + thiram)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two isolates (CEN287 and CEN316) significantly reduced the Foxy incidence and enhanced seed germination, though less effective than the fungicide mixture (carboxin + thiram).”
t0“common bean”
Claim · model-written summary
Principal component analysis implicated volatile metabolites in reducing Fusarium incidence on common bean seeds.
- Taxon
- common beanPhaseolus vulgarise0
- Interactor
- Foxye0pathogen
- Compound
- volatile metabolitese0
- Outcome
- Foxy incidencee0
- Direction
- reducinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A principal component analysis indicated the importance of volatile metabolites in reducing Foxy incidence on common bean seeds.”
Claim · model-written summary
CEN287 increased germination rate of Fusarium-infected seeds.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- CEN287 Trichoderma harzianum isolatee0
- Interactor
- Foxye0pathogen
- Outcome
- germination ratee0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CEN287 Trichoderma harzianum isolate formed a single group due to its increase in germination rate of Foxyinfected seeds.”
t0“common bean”
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See all 13 papers →Trichoderma harzianum · growth · Phaseolus vulgaris (common bean)Positive and negative results
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See all 18 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.