Abstract
Silicon has not been cataloged as an essential element for higher plants. However, it has shown beneficial effects on many crops, especially under abiotic and biotic stresses. Silicon fertilization was evaluated for the first time on plants exposed to fluctuations in an Fe regime (Fe sufficiency followed by Fe deficiency and, in turn, by Fe resupply). Root and foliar Si applications were compared using cucumber plants that were hydroponically grown in a growth chamber under different Fe nutritional statuses and Si applied either to the roots or to the shoots. The SPAD index, Fe, and Mn concentration, ROS, total phenolic compounds, MDA concentration, phytohormone balance, and cell cycle were determined. The results obtained showed that the addition of Si to the roots induced an Fe shortage in plants grown under optimal or deficient Fe nutritional conditions, but this was not observed when Si was applied to the leaves. Plant recovery following Fe resupply was more effective in the Si-treated plants than in the untreated plants. A relationship between the ROS concentration, hormonal balance, and cell cycle under different Fe regimes and in the presence or absence of Si was also studied. The contribution of Si to this signaling pathway appears to be related more to the induction of Fe deficiency, than to any direct biochemical or metabolic processes. However, these roles could not be completely ruled out because several hormone differences could only be explained by the addition of Si.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
Root silicon induced iron shortage under optimal or deficient iron supply.
- Taxon
- cucumber plants
Cucumis sativust0 - Treatment
- addition of Si to the rootse0
- Outcome
- Fe shortagee0
- Direction
- inducede0
- Qualifier
- under optimal or deficient Fe nutritional conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“addition of Si to the roots induced an Fe shortage in plants grown under optimal or deficient Fe nutritional conditions”
t0“cucumber plants”
Claim · model-written summary
Foliar silicon did not induce the iron shortage observed with root silicon.
- Taxon
- cucumber plantsCucumis sativust0
- Treatment
- Si was applied to the leavese0
- Outcome
- this was not observede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this was not observed when Si was applied to the leaves”
t0“cucumber plants”
Claim · model-written summary
Silicon-treated plants recovered more effectively after iron resupply than untreated plants.
- Taxon
- cucumber plantsCucumis sativust0
- Treatment
- Si-treated plantse0
- Outcome
- Plant recovery following Fe resupplye0
- Direction
- more effectivee0
- Comparator
- untreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant recovery following Fe resupply was more effective in the Si-treated plants than in the untreated plants”
t0“cucumber plants”
Claim · model-written summary
Silicon effects on signalling appear more related to induced iron deficiency than direct metabolic processes.
- Taxon
- cucumber plantsCucumis sativust0
- Outcome
- signaling pathwaye0
- Qualifier
- induction of Fe deficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“contribution of Si to this signaling pathway appears to be related more to the induction of Fe deficiency, than to any direct biochemical or metabolic processes”
t0“cucumber plants”
Claim · model-written summary
Several hormone differences were attributable to silicon addition.
- Taxon
- cucumber plantsCucumis sativust0
- Treatment
- addition of Sie0
- Outcome
- hormone differencese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“several hormone differences could only be explained by the addition of Si”
t0“cucumber plants”
The same questions in other papers
silicon atom · nutrient: content · Cucumis sativus (cucumber)Positive and negative results
18 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
17 papers more in this group
See all 21 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.