Abstract
Environmental concerns related to the use of synthetic iron chelates, usually non-biodegradable, for overcoming iron chlorosis motivates the search for alternative compounds. Thus, the main aim of this work was to evaluate siderophore, azotochelin, and a siderophore mimic, N-dihydroxy-N,N’-diisopropylhexanediamide (DPH) as potential sources of iron to cucumber plants grown in hydroponic cultures. The behavior of the iron chelates of azotochelin and DPH, as a substrate of ferric chelate reductase (FCR) and the ability as iron suppliers for chlorotic plants was studied and compared with o,o-EDDHA/Fe3+ and EDTA/Fe3+ chelates, traditionally used for this purpose. The rate of reduction of DPH/Fe3+, by FCR, was comparable to o,o-EDDHA/Fe3+ but lesser than the obtained for EDTA/Fe+3. The rate of reduction for azotochelin/Fe3+ was not possible to determine. Both azotochelin/Fe3+ and DPH/Fe3+ chelates were effective in supplying iron to cucumber plants. After 7 and 21 days, all the plants treated with the iron chelates (10 µM, Fe) of DPH and azotochelin showed significantly higher SPAD index, leaf dry weight and leaf Fe concentration than the control plants (2µM, Fe). In conclusion, azotochelin/Fe3+ and DPH/Fe3+ can be considered as iron sources for cucumber plants when growing in hydroponic culture.
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Claims 6
Claim · model-written summary
FCR reduced DPH/Fe3+ at a rate comparable to o,o-EDDHA/Fe3+ and below EDTA/Fe+3.
- Taxon
- cucumber plants
Cucumis sativust0 - Gene
- FCRe0
- Outcome
- rate of reduction of DPH/Fe3+e0
- Direction
- comparablee0
- Comparator
- o,o-EDDHA/Fe3+e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of reduction of DPH/Fe3+, by FCR, was comparable to o,o-EDDHA/Fe3+ but lesser than the obtained for EDTA/Fe+3.”
t0“cucumber plants in hydroponic cultures”
Claim · model-written summary
FCR reduction rate for azotochelin/Fe3+ could not be determined.
- Taxon
- cucumber plantsCucumis sativust0
- Outcome
- rate of reduction for azotochelin/Fe3+e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of reduction for azotochelin/Fe3+ was not possible to determine.”
t0“cucumber plants in hydroponic cultures”
Claim · model-written summary
Azotochelin/Fe3+ supplied iron to cucumber plants.
- Taxon
- cucumber plantsCucumis sativuse0
- Treatment
- azotochelin/Fe3+e0
- Outcome
- supplying irone0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both azotochelin/Fe3+ and DPH/Fe3+ chelates were effective in supplying iron to cucumber plants.”
Claim · model-written summary
DPH/Fe3+ supplied iron to cucumber plants.
- Taxon
- cucumber plantsCucumis sativuse0
- Treatment
- DPH/Fe3+e0
- Outcome
- supplying irone0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both azotochelin/Fe3+ and DPH/Fe3+ chelates were effective in supplying iron to cucumber plants.”
Claim · model-written summary
DPH iron chelate raised SPAD index, leaf dry weight and leaf Fe concentration compared with control after 7 and 21 days.
- Taxon
- cucumber plantsCucumis sativust0
- Treatment
- iron chelates (10 µM, Fe) of DPHe0
- Outcome
- SPAD index, leaf dry weight and leaf Fe concentratione0
- Direction
- highere0
- Qualifier
- After 7 and 21 dayse0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 7 and 21 days, all the plants treated with the iron chelates (10 µM, Fe) of DPH and azotochelin showed significantly higher SPAD index, leaf dry weight and leaf Fe concentration than the control plants (2µM, Fe).”
t0“cucumber plants in hydroponic cultures”
Claim · model-written summary
Azotochelin iron chelate raised SPAD index, leaf dry weight and leaf Fe concentration compared with control after 7 and 21 days.
- Taxon
- cucumber plantsCucumis sativust0
- Treatment
- azotocheline0
- Outcome
- SPAD index, leaf dry weight and leaf Fe concentratione0
- Direction
- highere0
- Qualifier
- After 7 and 21 dayse0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 7 and 21 days, all the plants treated with the iron chelates (10 µM, Fe) of DPH and azotochelin showed significantly higher SPAD index, leaf dry weight and leaf Fe concentration than the control plants (2µM, Fe).”
t0“cucumber plants in hydroponic cultures”
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1 paper in the same direction as this paper
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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.