Abstract
Coffee is one of the most important agricultural export commodities in the world and it represents the main export from some developing countries. Therefore, the development of new methods of coffee management that improves production without causing any damage to the environment is an attractive alternative for producers. Much effort has been invested towards understanding the mode of action of compounds that can induce resistance against several pathogens without injuring the environment. Many researches have considered silicon efficient in avoiding plant pathogen penetration and development. Our aim was to verify the effect of potassium silicate and calcium/magnesium silicate in the development of coffee seedlings (Coffea arabica cv. Mundo Novo) as well as to evaluate the incidence of coffee leaf rust development under greenhouse conditions. The experiment was a completely randomized design with 12 treatments with 10 plants per treatment. The treatments were 0, 0.25, 1.25, 2.5, 4 and 5 μM of Si for each source of silicon incorporated into the soil. The seedlings were inoculated with a urediniospores suspension of Hemileia vastatrix (2 mg/ml) at the seventh month after planting (six pair of leaves). Evaluations were performed by counting the number of lesions per leaf. The statistical analysis showed that the number of lesions reduced by up to 66% at the highest silicon dose when compared to the number of lesions in control plants. Infected plants were found to have a linear decrease of lesions with the increase of silicate concentration. The lowest number of lesions per leaf area was observed in plants that received 5 μM of Si from potassium silicate. This result indicates the use of silicon as an alternative for an ecological management system for coffee disease protection.
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Claims 4
Claim · model-written summary
The highest silicon dose reduced lesion numbers up to 66% versus controls.
- Treatment
- highest silicon dosee0
- Interactor
- Hemileia vastatrix
Hemileia vastatrixe1pathogen - Outcome
- number of lesionse0
- Direction
- reducede0
- Value
- 66%e0
- Comparator
- control plantse0
CoffeaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The statistical analysis showed that the number of lesions reduced by up to 66% at the highest silicon dose when compared to the number of lesions in control plants.”
e1“Hemileia vastatrix”
t0“coffee plants.”
Claim · model-written summary
Lesion numbers fell linearly as silicate concentration increased.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Infected plants were found to have a linear decrease of lesions with the increase of silicate concentration.”
t0“coffee plants.”
Claim · model-written summary
Plants receiving 5 μM of Si from potassium silicate had the fewest lesions per leaf area.
- Treatment
- 5 μM of Si from potassium silicatee0
- Outcome
- number of lesions per leaf areae0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest number of lesions per leaf area was observed in plants that received 5 μM of Si from potassium silicate.”
t0“coffee plants.”
Claim · model-written summary
The authors propose silicon for ecological coffee disease protection.
- Outcome
- use of silicon as an alternative for an ecological management system for coffee disease protectione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This result indicates the use of silicon as an alternative for an ecological management system for coffee disease protection.”
The same questions in other papers
silicate(4-) · disease · Coffea (coffee)Positive and negative results
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- no effect
- positive
- positive
silicon atom · Hemileia vastatrix · Coffea (coffee)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
potassium · disease · Coffea (coffee)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 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.