Abstract
Abstract Iron (Fe) is an essential element for plant growth, development and metabolism. Due to its lack of solubility and low bioavailability in soil, Fe levels are usually far below the optimum amount for most plants' growth and development. In apple production, excessive use of nitrogen fertilizer may cause iron chlorosis symptoms in the newly growing leaves, but the regulatory mechanisms underlying this phenomenon are unclear. In this study, low nitrate (NO 3 − , LN) application alleviated the symptoms of Fe deficiency and promoted lower rhizosphere pH, which was beneficial for root Fe acquisition. At the same time, LN treatment increased citrate and abscisic acid accumulation in roots, which promoted Fe transport from root to shoot and maintained Fe homeostasis. Moreover, qRT‐PCR analysis showed that nitrate application caused differential expression of genes related to Fe uptake and transport, as well as transcriptional regulators. In summary, our data reveal that low nitrate alleviated Fe deficiency through multiple pathways, demonstrating a new option for minimizing Fe deficiency by regulating the balance between nutrients.
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Claims 9
Claim · model-written summary
Low nitrate alleviated iron deficiency symptoms in apple.
- Taxon
- apple
Malus domesticat0 - Treatment
- low nitrate (NO 3 − , LN) applicatione0
- Outcome
- symptoms of Fe deficiencye0
- Direction
- alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low nitrate (NO 3 − , LN) application alleviated the symptoms of Fe deficiency”
t0“apple”
Claim · model-written summary
Low nitrate lowered rhizosphere pH.
- Taxon
- appleMalus domesticat0
- Treatment
- low nitrate (NO 3 − , LN) applicatione0
- Outcome
- rhizosphere pHe0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low nitrate (NO 3 − , LN) application alleviated the symptoms of Fe deficiency and promoted lower rhizosphere pH”
t0“apple”
Claim · model-written summary
The authors link lower rhizosphere pH to improved root iron acquisition.
- Taxon
- appleMalus domesticat0
- Outcome
- root Fe acquisitione0
- Qualifier
- lower rhizosphere pHe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower rhizosphere pH, which was beneficial for root Fe acquisition.”
t0“apple”
Claim · model-written summary
Low nitrate increased root citrate accumulation.
- Taxon
- appleMalus domesticat0
- Organ / stage
- rootse0
- Treatment
- LN treatmente0
- Outcome
- citratee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LN treatment increased citrate and abscisic acid accumulation in roots”
t0“apple”
Claim · model-written summary
Low nitrate increased root abscisic acid accumulation.
- Taxon
- appleMalus domesticat0
- Organ / stage
- rootse0
- Treatment
- LN treatmente0
- Outcome
- abscisic acid accumulation in rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LN treatment increased citrate and abscisic acid accumulation in roots”
t0“apple”
Claim · model-written summary
The authors link root citrate and abscisic acid accumulation to iron transport from root to shoot.
- Taxon
- appleMalus domesticat0
- Compound
- citrate and abscisic acide0
- Outcome
- Fe transport from root to shoote0
- Direction
- promotede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LN treatment increased citrate and abscisic acid accumulation in roots, which promoted Fe transport from root to shoot and maintained Fe homeostasis.”
t0“apple”
Claim · model-written summary
The authors link root citrate and abscisic acid accumulation to maintained iron homeostasis.
- Taxon
- appleMalus domesticat0
- Compound
- citrate and abscisic acide0
- Outcome
- Fe homeostasise0
- Direction
- maintainede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LN treatment increased citrate and abscisic acid accumulation in roots, which promoted Fe transport from root to shoot and maintained Fe homeostasis.”
t0“apple”
Claim · model-written summary
Nitrate application caused differential expression of iron uptake and transport genes and transcriptional regulators.
- Taxon
- appleMalus domesticat0
- Treatment
- nitrate applicatione0
- Outcome
- differential expression of genes related to Fe uptake and transport, as well as transcriptional regulatorse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrate application caused differential expression of genes related to Fe uptake and transport, as well as transcriptional regulators.”
t0“apple”
Claim · model-written summary
The authors propose nutrient balance regulation as an option to minimize apple iron deficiency.
- Taxon
- appleMalus domesticat0
- Outcome
- minimizing Fe deficiency by regulating the balance between nutrientse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a new option for minimizing Fe deficiency by regulating the balance between nutrients.”
t0“apple”
The same questions in other papers
nitrogen · disease · Malus domestica (apple)Positive and negative results
14 papers in the same direction as this paper · 8 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- no effect
20 papers more in this group
See all 24 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.