Abstract
ABSTRACT This work studied the behavior of different iron (Fe)-chelates as substrates of ferric chelate reductase (FCR) and their ability as Fe suppliers for mildly chlorotic plants. FCR activity and Fe concentration in xylem sap were determined in green stressed cucumber plants with different stress levels using different synthetic chelates as substrates. Both reduction and Fe concentration in the xylem sap were higher for the less-stable Fe chelates, except for Fe-EDTA, which presented a relatively low Fe concentration in sap. It was concluded that a high stability of the chelate in the nutrient solution reduces the Fe reduction, but other factors, such as the complexation of the Fe(II) by the chelating agents, should be considered when the complete process of Fe uptake is studied. The use of both indexes together, i.e., FCR determination and xylem sap concentration, is useful for understanding the Fe uptake from different Fe chelates.
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Claims 4
Claim · model-written summary
Less-stable Fe chelates gave higher root ferric chelate reductase activity and higher Fe concentration in xylem sap in stressed cucumber plants.
- Taxon
- Cucumber Plants
Cucumis sativust0 - Treatment
- less-stable Fe chelatese0
- Outcome
- reduction and Fe concentration in the xylem sape0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both reduction and Fe concentration in the xylem sap were higher for the less-stable Fe chelates”
t0“Green Stressed Cucumber Plants”
Claim · model-written summary
Fe-EDTA gave a relatively low Fe concentration in xylem sap in stressed cucumber plants.
- Taxon
- Cucumber PlantsCucumis sativust0
- Treatment
- Fe-EDTAe1
- Outcome
- Fe concentration in sape1
- Direction
- relatively lowe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“except for Fe-EDTA, which presented a relatively low Fe concentration in sap”
t0“Green Stressed Cucumber Plants”
Claim · model-written summary
High chelate stability in the nutrient solution was associated with reduced Fe reduction by cucumber roots.
- Taxon
- Cucumber PlantsCucumis sativust0
- Treatment
- a high stability of the chelate in the nutrient solutione2
- Outcome
- the Fe reductione2
- Direction
- reducese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“a high stability of the chelate in the nutrient solution reduces the Fe reduction”
t0“Green Stressed Cucumber Plants”
Claim · model-written summary
Using both FCR determination and xylem sap Fe concentration together is useful for understanding Fe uptake from different Fe chelates.
- Taxon
- Cucumber PlantsCucumis sativust0
- Outcome
- understanding the Fe uptake from different Fe chelatese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The use of both indexes together, i.e., FCR determination and xylem sap concentration, is useful for understanding the Fe uptake from different Fe chelates”
t0“Green Stressed Cucumber Plants”
The same questions in other papers
iron atom · nutrient: content · Cucumis sativus (cucumber)Positive and negative results
7 papers in the same direction as this paper · 4 in the opposite direction
- positive
- negative
- negative
8 papers more in this group
See all 12 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.