Abstract
Silicon can stimulate natural defense mechanisms in plants, reducing foliar diseases like powdery arid downy mildew on several crops, including lettuce. The effect of silicate on Fusarium wilt, caused by Fusarium oxysporum f. sp. lactucae was evaluated under greenhouse conditions on lettuce grown in soilless systems. Silicon, as potassium silicate, was added at 100 mg L(-1) of nutrient solution at three levels of electrical conductivity; 1.5-1.6 mS cm(-1) (E.C.1), 3.0-3.2 mS cm(-1) (E.C.2) and 4-4.2 mS cm(-1) (E.C.3). Pots containing lettuce plants were first inoculated with F. oxysporum f. sp. lactucae (3x10(5) chlamidospores ml(-1)) 15-20 days before transplanting. Disease severity and physiological parameters, including chlorophyll content, were analyzed weekly after transplanting. The addition of potassium silicate slightly reduced Fusarium wilt, at all levels of electrical conductivity under study, compared to the control. On the contrary, the increase of electrical conductivity of the nutrient solution showed no effect on the disease. The use of silicon was previously demonstrated to significantly reduce downy mildew on lettuce in soilless systems, and in this trial it demonstrated to slightly reduce disease severity of an important soil-borne pathogen like F. oxysporum f. sp. lactucae, suggesting the possibility to apply it successfully in soilless crops.
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Claims 3
Claim · model-written summary
Potassium silicate slightly reduced Fusarium wilt of lettuce at all tested electrical conductivity levels compared to the control.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- addition of potassium silicatee1
- Interactor
- Fusarium oxysporum f. sp. lactucae
Fusarium oxysporum f. sp. lactucaee2pathogen - Outcome
- Fusarium wilte1
- Direction
- reducede1
- Qualifier
- slightlye1
- Comparator
- controle1
- Setting
- greenhouse conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was evaluated under greenhouse conditions on lettuce grown in soilless systems”
e1“The addition of potassium silicate slightly reduced Fusarium wilt, at all levels of electrical conductivity under study, compared to the control”
e2“Fusarium wilt, caused by Fusarium oxysporum f. sp. lactucae”
Claim · model-written summary
Increasing the electrical conductivity of the nutrient solution had no effect on lettuce Fusarium wilt.
- Taxon
- lettuceLactuca sativae0
- Treatment
- increase of electrical conductivity of the nutrient solutione3
- Interactor
- Fusarium oxysporum f. sp. lactucaeFusarium oxysporum f. sp. lactucaee2pathogen
- Outcome
- diseasee3
- Direction
- no effecte3
- Setting
- greenhouse conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was evaluated under greenhouse conditions on lettuce grown in soilless systems”
e3“the increase of electrical conductivity of the nutrient solution showed no effect on the disease”
e2“Fusarium wilt, caused by Fusarium oxysporum f. sp. lactucae”
Claim · model-written summary
The authors suggest that silicon can be applied successfully in soilless lettuce crops.
- Taxon
- lettuceLactuca sativae0
- Outcome
- possibility to apply it successfully in soilless cropse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was evaluated under greenhouse conditions on lettuce grown in soilless systems”
e4“suggesting the possibility to apply it successfully in soilless crops”
The same questions in other papers
fertilization · Fusarium oxysporum f. sp. lactucae · Lactuca sativa (garden lettuce)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
potassium · Fusarium oxysporum f. sp. lactucae · Lactuca sativa (garden lettuce)Results agree
1 paper in the same direction as this paper
- 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.