Abstract
Ceratobasidium includes orchid mycorrhizal symbionts, plant pathogens and biocontrol agents of soilborne plant pathogens. It is not known to what extent members of the first guild also can participate in the others. Ceratobasidium spp. were isolated from roots of Colombian orchids and identified by phylogeny based on nrITS sequences. Phylogenetic grouping of Ceratobasidium spp. isolates corresponded to orchid host substrate (epiphytic vs. terrestrial). Isolates were tested for virulence on rice and for biocontrol of Rhizoctonia solani, causal agent of sheath blight of rice. All Ceratobasidium spp. isolates caused some signs of sheath blight but significantly less than a pathogenic R. solani used as a positive control. When Ceratobasidium spp. isolates were inoculated on rice seedlings 3 d before R. solani, they significantly reduced disease expression compared to controls inoculated with R. solani alone. The use of Ceratobasidium spp. from orchids for biological control is novel, and biodiverse countries such as Colombia are promising places to look for new biocontrol agents.
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Claims 4
Claim · model-written summary
Ceratobasidium isolate phylogenetic groups corresponded to orchid host substrate.
- Taxon
- orchide0
- Interactor
- Ceratobasidium spp.
.jpg?width=60)
Ceratobasidiume0symbiont - Outcome
- Phylogenetic groupinge0
- Comparator
- epiphytic vs. terrestriale0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Phylogenetic grouping of Ceratobasidium spp. isolates corresponded to orchid host substrate (epiphytic vs. terrestrial).”
t0“orchid”
Claim · model-written summary
All Ceratobasidium isolates caused some rice sheath blight signs, significantly less than pathogenic R. solani.
- Taxon
- rice
Oryza sativat0 - Treatment
- Ceratobasidium spp. isolatese0
- Interactor
- Ceratobasidium spp.Ceratobasidiume0pathogen
- Outcome
- signs of sheath blighte0
- Direction
- lesse0
- Comparator
- pathogenic R. solanie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All Ceratobasidium spp. isolates caused some signs of sheath blight but significantly less than a pathogenic R. solani used as a positive control.”
t0“rice”
Claim · model-written summary
Ceratobasidium inoculation three days before R. solani significantly reduced rice disease expression relative to R. solani alone.
- Taxon
- riceOryza sativae0
- Treatment
- Ceratobasidium spp. isolates were inoculatede0
- Interactor
- R. solani
Rhizoctonia solanie0pathogen - Second interactor
- Ceratobasidium spp.Ceratobasidiume0biocontrol_agent
- Outcome
- disease expressione0
- Direction
- reducede0
- Qualifier
- 3 d before R. solanie0
- Comparator
- controls inoculated with R. solani alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When Ceratobasidium spp. isolates were inoculated on rice seedlings 3 d before R. solani, they significantly reduced disease expression compared to controls inoculated with R. solani alone.”
Claim · model-written summary
The authors identify Colombia as a promising source of new orchid-derived biocontrol agents.
Verbatim
e0“biodiverse countries such as Colombia are promising places to look for new biocontrol agents.”
t0“orchid”
The same questions in other papers
inoculation · Rhizoctonia solani · Oryza sativa (rice)Positive and negative results
22 papers in the same direction as this paper · 8 in the opposite direction
- negative
- no effect
- negative
27 papers more in this group
See all 31 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.