Abstract
Bakanae disease is a major rice disease caused by Fusarium fujikuroi. Infected plants show slender and hyper elongated internodes due to the over-production of gibberellic acid. Application of Trichoderma spp. as biocontrol agent is gaining attention due to high capability in hyperparasitize the soil borne pathogen. The studies aimed to screen and evaluate the bio-efficacy of Trichoderma spp. with antagonistic activities against F. fujikuroi and plant growth-promoting properties. All the 65 Trichoderma isolates were isolated from healthy rice rhizosphere soil. Thirty eight out of 65 Trichoderma isolates exhibited more than 45 Percentage of Inhibition Radial Growth (PIRG) against F. fujikuroi in dual culture plate testing. All selected Trichoderma isolates were further in vitro screened for antagonistic testing: volatile compounds production and hydrogen cyanide production and plant growth-promotion properties: IAA production and phosphate solubilization. Twelve Trichoderma isolates were selected for further evaluation on antagonistic activity against F. fujikuroi, germination rate, plumule and radical lengths and vigor index. Finally, seven of the most potential Trichoderma isolates were selected for greenhouse evaluation. The bakanae disease incidence and disease severity in rice plant treated with respective selected Trichoderma isolates were significant reduced as compared with untreated plant. However, there was no significant increase in plant height between Trichoderma inoculated and uninoculated plants. Moreover, rice plant treated with Trichoderma T61 showed significantly increase in total plant dry biomass as compared to untreated plants. The selected Trichoderma isolates have potential to be developed as biological control agent against F. fujikuroi and also as an alternative for bakanae management.
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Claims 6
Claim · model-written summary
Thirty-eight of 65 Trichoderma isolates inhibited F. fujikuroi radial growth by more than 45% in dual culture.
- Taxon
- Rice
Oryza sativat0 - Interactor
- F. fujikuroi
Fusarium fujikuroie0pathogen - Second interactor
- Trichoderma isolatese0biocontrol_agent
- Outcome
- Inhibition Radial Growth (PIRG) against F. fujikuroie0
- Value
- more than 45 Percentagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thirty eight out of 65 Trichoderma isolates exhibited more than 45 Percentage of Inhibition Radial Growth (PIRG) against F. fujikuroi in dual culture plate testing.”
t0“Rice”
Claim · model-written summary
Selected Trichoderma isolates significantly reduced bakanae disease incidence compared with untreated rice.
- Taxon
- riceOryza sativae0
- Treatment
- treated with respective selected Trichoderma isolatese0
- Interactor
- Trichoderma isolatese0biocontrol_agent
- Outcome
- bakanae disease incidencee0
- Direction
- reducede0
- Comparator
- untreated plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The bakanae disease incidence and disease severity in rice plant treated with respective selected Trichoderma isolates were significant reduced as compared with untreated plant.”
Claim · model-written summary
Selected Trichoderma isolates significantly reduced bakanae disease severity compared with untreated rice.
- Taxon
- riceOryza sativae0
- Treatment
- treated with respective selected Trichoderma isolatese0
- Interactor
- Trichoderma isolatese0biocontrol_agent
- Outcome
- disease severitye0
- Direction
- reducede0
- Comparator
- untreated plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The bakanae disease incidence and disease severity in rice plant treated with respective selected Trichoderma isolates were significant reduced as compared with untreated plant.”
Claim · model-written summary
Trichoderma inoculation did not significantly increase rice plant height.
- Taxon
- RiceOryza sativat0
- Treatment
- Trichoderma inoculatede0
- Interactor
- Trichoderma
Trichodermae0biocontrol_agent - Outcome
- plant heighte0
- Direction
- no significant increasee0
- Comparator
- uninoculated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no significant increase in plant height between Trichoderma inoculated and uninoculated plants.”
t0“Rice”
Claim · model-written summary
Trichoderma T61 significantly increased total rice plant dry biomass over untreated plants.
- Taxon
- riceOryza sativae0
- Treatment
- treated with Trichoderma T61e0
- Interactor
- Trichoderma T61e0biocontrol_agent
- Outcome
- total plant dry biomasse0
- Direction
- increasee0
- Comparator
- untreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice plant treated with Trichoderma T61 showed significantly increase in total plant dry biomass as compared to untreated plants.”
Claim · model-written summary
The authors conclude that selected Trichoderma isolates have potential as biological control agents for bakanae management.
- Taxon
- RiceOryza sativat0
- Interactor
- F. fujikuroiFusarium fujikuroie0pathogen
- Second interactor
- Trichoderma isolatese0biocontrol_agent
- Outcome
- alternative for bakanae managemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The selected Trichoderma isolates have potential to be developed as biological control agent against F. fujikuroi and also as an alternative for bakanae management.”
t0“Rice”
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