Abstract
We studied the relative efficacy of different forms of foliar iron (Fe) fertilisation on leaf re-greening in Fe-deficient, purple-fleshed sweet potato (Ipomoea batatas (L.) Lam.) varieties xuzi8 and xuzi6. Activities of ferric chelate reductase (FCR) and concentrations of Fe were measured in the leaves and roots at intervals over 5 days to quantify recovery from leaf chlorosis. Freshly expanded and chlorotic leaves were immersed in one of three different fertiliser compounds containing 9 mm Fe: FeSO4, Fe2(SO4)3, Fe(III)-EDTA. An Fe-sufficient treatment and an Fe-deficient control were included. The experiment had a completely randomised block design with five replications per treatment and was conducted in a sunlit glasshouse. For variety xuzi8, leaf FCR activity in the Fe2(SO4)3 treatment was highest at 1 h after application, and higher than all other treatments, whereas FeSO4 and Fe(III)-EDTA treatments showed their highest FCR at day 5 after application, both significantly higher than the Fe2(SO4)3 and control treatments. Furthermore, leaf Fe concentration reached a maximum in the FeSO4 treatment at day 1, and in the Fe2(SO4)3 treatment at day 3. By contrast, root Fe concentration was relatively constant and lower in the foliar Fe treatments than the Fe-sufficient and -deficient treatments. For variety xuzi6, leaf SPAD was higher with the Fe2(SO4)3 than the FeSO4 treatment at day 5 after application. In general, FCR activity and Fe concentrations in roots and leaves of xuzi6 were higher than those of xuzi8. Variations in leaf Fe concentrations were similar for both the FeSO4 and Fe2(SO4)3 treatments of the two varieties. Maximum leaf Fe levels in xuzi6 were ~4-fold those in xuzi8. The results of the study suggest that foliar-applied Fe2(SO4)3 was the most effective compound at correcting Fe-deficiency symptoms. The higher leaf and root FCR activity and Fe concentration in xuzi6 might explain its higher tolerance to Fe deficiency and better re-greening than xuzi8.
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Claims 12
Claim · model-written summary
In xuzi8, leaf FCR activity in the Fe2(SO4)3 treatment was highest at 1 h after application, higher than all other treatments.
- Taxon
- sweet potato
_Flower.jpg?width=60)
Ipomoea batatase2 - Material
- xuzi8e1
- Organ / stage
- leafe1
- Treatment
- Fe2(SO4)3e1
- Outcome
- FCR activitye1
- Direction
- higheste1
- Qualifier
- at 1 h after applicatione1
- Comparator
- all other treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e1“For variety xuzi8, leaf FCR activity in the Fe2(SO4)3 treatment was highest at 1 h after application, and higher than all other treatments”
e2“purple-fleshed sweet potato (Ipomoea batatas (L.) Lam.) varieties xuzi8 and xuzi6”
t0“Effects of different foliar iron applications on activity of ferric chelate reductase and concentration of iron in sweet potato (Ipomoea batatas)”
Claim · model-written summary
In xuzi8, FeSO4 gave significantly higher FCR than Fe2(SO4)3 and control at day 5.
- Taxon
- sweet potatoIpomoea batatase3
- Material
- xuzi8e2
- Treatment
- FeSO4e1
- Outcome
- FCRe1
- Direction
- significantly highere1
- Qualifier
- at day 5 after applicatione1
- Comparator
- Fe2(SO4)3 and control treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“FeSO4 and Fe(III)-EDTA treatments showed their highest FCR at day 5 after application, both significantly higher than the Fe2(SO4)3 and control treatments”
e2“For variety xuzi8, leaf FCR activity in the Fe2(SO4)3 treatment was highest at 1 h after application, and higher than all other treatments”
e3“purple-fleshed sweet potato (Ipomoea batatas (L.) Lam.) varieties xuzi8 and xuzi6”
Claim · model-written summary
In xuzi8, Fe(III)-EDTA gave significantly higher FCR than Fe2(SO4)3 and control at day 5.
- Taxon
- sweet potatoIpomoea batatase3
- Material
- xuzi8e2
- Treatment
- Fe(III)-EDTAe1
- Outcome
- FCRe1
- Direction
- significantly highere1
- Qualifier
- at day 5 after applicatione1
- Comparator
- Fe2(SO4)3 and control treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“FeSO4 and Fe(III)-EDTA treatments showed their highest FCR at day 5 after application, both significantly higher than the Fe2(SO4)3 and control treatments”
e2“For variety xuzi8, leaf FCR activity in the Fe2(SO4)3 treatment was highest at 1 h after application, and higher than all other treatments”
e3“purple-fleshed sweet potato (Ipomoea batatas (L.) Lam.) varieties xuzi8 and xuzi6”
Claim · model-written summary
Leaf Fe concentration reached a maximum with FeSO4 at day 1.
- Taxon
- sweet potatoIpomoea batatase2
- Organ / stage
- leafe1
- Treatment
- FeSO4e1
- Outcome
- leaf Fe concentratione1
- Direction
- reached a maximume1
- Qualifier
- at day 1e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Furthermore, leaf Fe concentration reached a maximum in the FeSO4 treatment at day 1, and in the Fe2(SO4)3 treatment at day 3”
e2“purple-fleshed sweet potato (Ipomoea batatas (L.) Lam.) varieties xuzi8 and xuzi6”
Claim · model-written summary
Leaf Fe concentration reached a maximum with Fe2(SO4)3 at day 3.
- Taxon
- sweet potatoIpomoea batatase2
- Organ / stage
- leafe1
- Treatment
- Fe2(SO4)3e1
- Outcome
- leaf Fe concentratione1
- Direction
- reached a maximume1
- Qualifier
- at day 3e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Furthermore, leaf Fe concentration reached a maximum in the FeSO4 treatment at day 1, and in the Fe2(SO4)3 treatment at day 3”
e2“purple-fleshed sweet potato (Ipomoea batatas (L.) Lam.) varieties xuzi8 and xuzi6”
Claim · model-written summary
Foliar Fe treatments kept root Fe concentration relatively constant and lower than Fe-sufficient and Fe-deficient treatments.
- Taxon
- sweet potatoIpomoea batatase2
- Organ / stage
- roote1
- Treatment
- foliar Fe treatmentse1
- Outcome
- root Fe concentratione1
- Direction
- lowere1
- Comparator
- Fe-sufficient and -deficient treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“By contrast, root Fe concentration was relatively constant and lower in the foliar Fe treatments than the Fe-sufficient and -deficient treatments”
e2“purple-fleshed sweet potato (Ipomoea batatas (L.) Lam.) varieties xuzi8 and xuzi6”
Claim · model-written summary
In xuzi6, leaf SPAD was higher with Fe2(SO4)3 than with FeSO4 at day 5.
- Taxon
- sweet potatoIpomoea batatase2
- Material
- xuzi6e1
- Organ / stage
- leafe1
- Treatment
- Fe2(SO4)3e1
- Outcome
- leaf SPADe1
- Direction
- highere1
- Qualifier
- at day 5 after applicatione1
- Comparator
- FeSO4 treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“For variety xuzi6, leaf SPAD was higher with the Fe2(SO4)3 than the FeSO4 treatment at day 5 after application”
e2“purple-fleshed sweet potato (Ipomoea batatas (L.) Lam.) varieties xuzi8 and xuzi6”
Claim · model-written summary
FCR activity and Fe concentrations in roots and leaves were higher in xuzi6 than in xuzi8.
- Taxon
- sweet potatoIpomoea batatase2
- Material
- xuzi6e1
- Organ / stage
- roots and leavese1
- Outcome
- FCR activity and Fe concentrationse1
- Direction
- highere1
- Comparator
- xuzi8e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In general, FCR activity and Fe concentrations in roots and leaves of xuzi6 were higher than those of xuzi8”
e2“purple-fleshed sweet potato (Ipomoea batatas (L.) Lam.) varieties xuzi8 and xuzi6”
Claim · model-written summary
Variations in leaf Fe concentrations were similar for FeSO4 and Fe2(SO4)3 in both varieties.
- Taxon
- sweet potatoIpomoea batatase2
- Treatment
- FeSO4e1
- Outcome
- Variations in leaf Fe concentrationse1
- Direction
- similare1
- Comparator
- Fe2(SO4)3e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Variations in leaf Fe concentrations were similar for both the FeSO4 and Fe2(SO4)3 treatments of the two varieties”
e2“purple-fleshed sweet potato (Ipomoea batatas (L.) Lam.) varieties xuzi8 and xuzi6”
Claim · model-written summary
Maximum leaf Fe levels in xuzi6 were about 4-fold those in xuzi8.
- Taxon
- sweet potatoIpomoea batatase2
- Material
- xuzi6e1
- Outcome
- Maximum leaf Fe levelse1
- Direction
- higherinferrede1
- Value
- ~4-folde1
- Comparator
- xuzi8e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Maximum leaf Fe levels in xuzi6 were ~4-fold those in xuzi8”
e2“purple-fleshed sweet potato (Ipomoea batatas (L.) Lam.) varieties xuzi8 and xuzi6”
Claim · model-written summary
Foliar-applied Fe2(SO4)3 was the most effective compound at correcting Fe-deficiency symptoms.
- Taxon
- sweet potatoIpomoea batatase2
- Treatment
- foliar-applied Fe2(SO4)3e1
- Outcome
- correcting Fe-deficiency symptomse1
- Direction
- most effectivee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results of the study suggest that foliar-applied Fe2(SO4)3 was the most effective compound at correcting Fe-deficiency symptoms”
e2“purple-fleshed sweet potato (Ipomoea batatas (L.) Lam.) varieties xuzi8 and xuzi6”
Claim · model-written summary
Higher leaf and root FCR activity and Fe concentration in xuzi6 might explain its higher tolerance to Fe deficiency.
- Taxon
- sweet potatoIpomoea batatase2
- Material
- xuzi6e1
- Outcome
- tolerance to Fe deficiencye1
- Qualifier
- higher leaf and root FCR activity and Fe concentratione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The higher leaf and root FCR activity and Fe concentration in xuzi6 might explain its higher tolerance to Fe deficiency and better re-greening than xuzi8”
e2“purple-fleshed sweet potato (Ipomoea batatas (L.) Lam.) varieties xuzi8 and xuzi6”
The same questions in other papers
application · disease · Ipomoea batatas (sweet potato)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- 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.