Abstract
Abscisic acid (ABA) has been demonstrated to be involved in iron (Fe) homeostasis, but the underlying mechanism is largely unknown. Here, we found that Fe deficiency induced ABA accumulation rapidly (within 6 h) in the roots of Arabidopsis. Exogenous ABA at 0.5 μM decreased the amount of root apoplastic Fe bound to pectin and hemicellulose, and increased the shoot Fe content significantly, thus alleviating Fe deficiency-induced chlorosis. Exogenous ABA promoted the secretion of phenolics to release apoplastic Fe and up-regulated the expression of AtNRAMP3 to enhance reutilization of Fe stored in the vacuoles, leading to a higher level of soluble Fe and lower ferric-chelate reductase (FCR) activity in roots. Treatment with ABA also led to increased Fe concentrations in the xylem sap, partially because of the up-regulation of AtFRD3, AtYSL2 and AtNAS1, genes related to long-distance transport of Fe. Exogenous ABA could not alleviate the chlorosis of abi5 mutant resulting from the significantly low expression of AtYSL2 and low transport of Fe from root to shoot. Taken together, our data support the conclusion that ABA is involved in the reutilization and transport of Fe from root to shoot under Fe deficiency conditions in Arabidopsis.
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Claims 15
Claim · model-written summary
Fe deficiency induced ABA accumulation within 6 h in Arabidopsis roots.
- Taxon
- Arabidopsis
Arabidopsist0 - Organ / stage
- rootse1
- Treatment
- Fe deficiencye1
- Outcome
- ABA accumulatione1
- Direction
- inducede1
- Qualifier
- rapidly (within 6 h)e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Fe deficiency induced ABA accumulation rapidly (within 6 h) in the roots of Arabidopsis”
t0“Arabidopsis”
Claim · model-written summary
Exogenous ABA at 0.5 μM decreased the amount of root apoplastic Fe bound to pectin and hemicellulose.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- root apoplastice1
- Treatment
- Exogenous ABA at 0.5 μMe1
- Outcome
- amount of root apoplastic Fe bound to pectin and hemicellulosee1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Exogenous ABA at 0.5 μM decreased the amount of root apoplastic Fe bound to pectin and hemicellulose, and increased the shoot Fe content significantly, thus alleviating Fe deficiency-induced chlorosis”
t0“Arabidopsis”
Claim · model-written summary
Exogenous ABA at 0.5 μM significantly increased shoot Fe content.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- shoote1
- Treatment
- Exogenous ABA at 0.5 μMe1
- Outcome
- shoot Fe contente1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Exogenous ABA at 0.5 μM decreased the amount of root apoplastic Fe bound to pectin and hemicellulose, and increased the shoot Fe content significantly, thus alleviating Fe deficiency-induced chlorosis”
t0“Arabidopsis”
Claim · model-written summary
Exogenous ABA at 0.5 μM alleviated Fe deficiency-induced chlorosis.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- Exogenous ABAe1
- Outcome
- Fe deficiency-induced chlorosise1
- Direction
- alleviatinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Exogenous ABA at 0.5 μM decreased the amount of root apoplastic Fe bound to pectin and hemicellulose, and increased the shoot Fe content significantly, thus alleviating Fe deficiency-induced chlorosis”
t0“Arabidopsis”
Claim · model-written summary
Exogenous ABA promoted secretion of phenolics to release apoplastic Fe.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- Exogenous ABAe2
- Outcome
- secretion of phenolicse2
- Direction
- promotede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Exogenous ABA promoted the secretion of phenolics to release apoplastic Fe and up-regulated the expression of AtNRAMP3 to enhance reutilization of Fe stored in the vacuoles, leading to a higher level of soluble Fe and lower ferric-chelate reductase (FCR) activity in roots”
t0“Arabidopsis”
Claim · model-written summary
Exogenous ABA up-regulated expression of AtNRAMP3.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- Exogenous ABAe2
- Gene
- AtNRAMP3e2
- Outcome
- expressione2
- Direction
- up-regulatede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Exogenous ABA promoted the secretion of phenolics to release apoplastic Fe and up-regulated the expression of AtNRAMP3 to enhance reutilization of Fe stored in the vacuoles, leading to a higher level of soluble Fe and lower ferric-chelate reductase (FCR) activity in roots”
t0“Arabidopsis”
Claim · model-written summary
Up-regulation of AtNRAMP3 by ABA is proposed to enhance reutilization of vacuolar Fe.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- AtNRAMP3e2
- Outcome
- reutilization of Fe stored in the vacuolese2
- Qualifier
- to enhancee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Exogenous ABA promoted the secretion of phenolics to release apoplastic Fe and up-regulated the expression of AtNRAMP3 to enhance reutilization of Fe stored in the vacuoles, leading to a higher level of soluble Fe and lower ferric-chelate reductase (FCR) activity in roots”
t0“Arabidopsis”
Claim · model-written summary
Exogenous ABA led to a higher level of soluble Fe in Arabidopsis roots.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- Exogenous ABAe2
- Outcome
- soluble Fee2
- Direction
- highere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Exogenous ABA promoted the secretion of phenolics to release apoplastic Fe and up-regulated the expression of AtNRAMP3 to enhance reutilization of Fe stored in the vacuoles, leading to a higher level of soluble Fe and lower ferric-chelate reductase (FCR) activity in roots”
t0“Arabidopsis”
Claim · model-written summary
Exogenous ABA lowered ferric-chelate reductase (FCR) activity in roots.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- rootse2
- Treatment
- Exogenous ABAe2
- Outcome
- ferric-chelate reductase (FCR) activitye2
- Direction
- lowere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Exogenous ABA promoted the secretion of phenolics to release apoplastic Fe and up-regulated the expression of AtNRAMP3 to enhance reutilization of Fe stored in the vacuoles, leading to a higher level of soluble Fe and lower ferric-chelate reductase (FCR) activity in roots”
t0“Arabidopsis”
Claim · model-written summary
Treatment with ABA increased Fe concentrations in the xylem sap.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- xylem sape3
- Treatment
- Treatment with ABAe3
- Outcome
- Fe concentrations in the xylem sape3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Treatment with ABA also led to increased Fe concentrations in the xylem sap, partially because of the up-regulation of AtFRD3, AtYSL2 and AtNAS1, genes related to long-distance transport of Fe”
t0“Arabidopsis”
Claim · model-written summary
Treatment with ABA up-regulated AtFRD3, AtYSL2 and AtNAS1.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- Treatment with ABAe3
- Gene
- AtFRD3, AtYSL2 and AtNAS1e3
- Outcome
- up-regulatione3
- Direction
- up-regulatione3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Treatment with ABA also led to increased Fe concentrations in the xylem sap, partially because of the up-regulation of AtFRD3, AtYSL2 and AtNAS1, genes related to long-distance transport of Fe”
t0“Arabidopsis”
Claim · model-written summary
Exogenous ABA could not alleviate chlorosis of the abi5 mutant.
- Taxon
- ArabidopsisArabidopsist0
- Material
- abi5 mutante4
- Treatment
- Exogenous ABAe4
- Outcome
- chlorosise4
- Direction
- could not alleviatee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Exogenous ABA could not alleviate the chlorosis of abi5 mutant resulting from the significantly low expression of AtYSL2 and low transport of Fe from root to shoot”
t0“Arabidopsis”
Claim · model-written summary
The abi5 mutant shows significantly low AtYSL2 expression.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Exogenous ABA could not alleviate the chlorosis of abi5 mutant resulting from the significantly low expression of AtYSL2 and low transport of Fe from root to shoot”
t0“Arabidopsis”
Claim · model-written summary
The abi5 mutant shows low transport of Fe from root to shoot.
- Taxon
- ArabidopsisArabidopsist0
- Material
- abi5 mutante4
- Outcome
- transport of Fe from root to shoote4
- Direction
- lowe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Exogenous ABA could not alleviate the chlorosis of abi5 mutant resulting from the significantly low expression of AtYSL2 and low transport of Fe from root to shoot”
t0“Arabidopsis”
Claim · model-written summary
ABA is involved in reutilization and transport of Fe from root to shoot under Fe deficiency, according to the authors.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- Fe deficiency conditionse5
- Compound
- ABAe5
- Outcome
- reutilization and transport of Fe from root to shoote5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Taken together, our data support the conclusion that ABA is involved in the reutilization and transport of Fe from root to shoot under Fe deficiency conditions in Arabidopsis”
t0“Arabidopsis”
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See all 82 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.