Abstract
Several volatile natural compounds produced by plant secondary metabolism have been proven to present antimicrobial action, enabling their use in phytopathogen control. They also present low environmental impact when compared to conventional pesticides. Essential oils contain these compounds and can be found in several plant species, such as Lippia alba (Mill.) N.E. Brown (Verbenaceae). Essential oils of four chemotypes of L. alba, characterized by their major compounds, namely camphor, citral, linalool and camphor/1,8-cineole, were tested against the phytopathogen Alternaria solani Sorauer (Pleosporaceae), which causes early blight on tomatoes and is responsible for great economic losses regarding production. Essential oils antifungal action was tested in vitro using potato dextrose agar medium with essential oil concentrations at 0.1, 0.5, 1.0, 1.5 and 2.0 µL mL-1. The chemotype that had the best performance was citral, showing significant inhibition compared to the others, starting at the 0.5 µL mL-1 concentration. The essential oil belonging to the linalool chemotype was efficient starting at the 1.5 µL mL-1 concentration. Conversely, the camphor chemotype did not show any action against the phytopathogen. Moreover, the essential oils had no remarkable effect on tomato germination and growth. In conclusion, these essential oils presented fungicidal action against A. solani.
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Claims 5
Claim · model-written summary
Citral chemotype oil significantly inhibited Alternaria solani relative to the other oils from 0.5 µL mL-1.
- Taxon
- Lippia alba
Lippia albat0 - Treatment
- citrale0
- Interactor
- Alternaria solani
Alternaria solanit0pathogen - Outcome
- inhibitione0
- Direction
- inhibitione0
- Value
- 0.5 µL mL-1e0
- Comparator
- the otherse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chemotype that had the best performance was citral, showing significant inhibition compared to the others, starting at the 0.5 µL mL-1 concentration.”
t0“Lippia alba (Verbenaceae) essential oils against Alternaria solani”
Claim · model-written summary
Linalool chemotype oil was effective from 1.5 µL mL-1.
- Taxon
- Lippia albaLippia albat0
- Material
- linalool chemotypee0
- Interactor
- Alternaria solaniAlternaria solanit0pathogen
- Outcome
- efficiente0
- Value
- 1.5 µL mL-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The essential oil belonging to the linalool chemotype was efficient starting at the 1.5 µL mL-1 concentration.”
t0“Lippia alba (Verbenaceae) essential oils against Alternaria solani”
Claim · model-written summary
Camphor chemotype oil showed no action against the phytopathogen.
- Taxon
- Lippia albaLippia albat0
- Material
- camphor chemotypee0
- Interactor
- Alternaria solaniAlternaria solanit0pathogen
- Outcome
- did not show any actione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conversely, the camphor chemotype did not show any action against the phytopathogen.”
t0“Lippia alba (Verbenaceae) essential oils against Alternaria solani”
Claim · model-written summary
The essential oils had no remarkable effect on tomato germination and growth.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- essential oilse0
- Outcome
- tomato germination and growthe0
- Direction
- no remarkable effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moreover, the essential oils had no remarkable effect on tomato germination and growth.”
Claim · model-written summary
The essential oils had fungicidal action against A. solani.
- Taxon
- Lippia albaLippia albat0
- Interactor
- A. solaniAlternaria solanie0pathogent0
- Outcome
- fungicidal action against A. solanie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In conclusion, these essential oils presented fungicidal action against A. solani.”
t0“Lippia alba (Verbenaceae) essential oils against Alternaria solani”
The same questions in other papers
botanical · growth · Solanum lycopersicum (tomato)Positive and negative results
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See all 291 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.