Abstract
Background: Abscisic acid (ABA) is a well-studied phytohormone demonstrated to be involved in sub-sets of stress responses in plants, such as iron (Fe) deficiency and phosphorus (P) deficiency in Arabidopsis. However, whether ABA is involved in P deficiency in rice has not been frequently studied. The present study was undertaken to investigate the mechanism underlying ABA-aggravated P deficiency in rice (Oryza sativa). Results: P deficiency decreased ABA accumulation rapidly (within 1 h) in the roots. Exogenous ABA negatively regulated root and shoot soluble P contents by decreasing pectin content, inhibiting P deficiency-induced increases in pectin methylesterase activity and expression of the phosphate transporter gene-OsPT6, thereby decreasing the re-utilization of P from the cell wall and its translocation to the shoot. Moreover, neither the nitric oxide (NO) donor sodium nitroprusside nor ethylene precursor 1-aminocyclopropane-1-carboxylic acid had any effect on ABA accumulation, and application of ABA or the ABA inhibitor fluridone also had no effect on NO production and ethylene emission. Conclusions: Under P deficiency, NO levels increase as quickly as ABA levels decrease, to inhibit both the ABA-induced reduction of pectin contents for the re-utilization of cell wall P and the ABA-induced down-regulation of OsPT6 for the translocation of P from roots to shoots. Overall, our results provide novel information indicating that the reduction of ABA under P deficiency is a very important pathway in the re-utilization of cell wall P in rice under P-deficient conditions, which should be a very effective mechanism for plant survival under P deficiency stress for common agronomic practice.
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Claims 10
Claim · model-written summary
P deficiency decreased ABA accumulation in rice roots within 1 h.
- Taxon
- rice (Oryza sativa)
Oryza sativat0 - Organ / stage
- rootse1
- Treatment
- P deficiencye1
- Outcome
- ABA accumulatione1
- Direction
- decreasede1
- Qualifier
- within 1 he1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscisic acid is involved in root cell wall phosphorus remobilization independent of nitric oxide and ethylene in rice (Oryza sativa)”
e1“P deficiency decreased ABA accumulation rapidly (within 1 h) in the roots”
Claim · model-written summary
Exogenous ABA negatively regulated root and shoot soluble P contents in rice.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Organ / stage
- root and shoote2
- Treatment
- Exogenous ABAe2
- Outcome
- soluble P contentse2
- Direction
- negatively regulatede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscisic acid is involved in root cell wall phosphorus remobilization independent of nitric oxide and ethylene in rice (Oryza sativa)”
e2“Exogenous ABA negatively regulated root and shoot soluble P contents”
Claim · model-written summary
Exogenous ABA decreased pectin content in rice.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- Exogenous ABAe2
- Outcome
- pectin contente3
- Direction
- decreasinge3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscisic acid is involved in root cell wall phosphorus remobilization independent of nitric oxide and ethylene in rice (Oryza sativa)”
e2“Exogenous ABA negatively regulated root and shoot soluble P contents”
e3“by decreasing pectin content”
Claim · model-written summary
Exogenous ABA inhibited the P deficiency-induced increase in pectin methylesterase activity in rice.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- Exogenous ABAe2
- Gene
- pectin methylesterasee4
- Outcome
- pectin methylesterase activitye4
- Direction
- inhibitinge4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscisic acid is involved in root cell wall phosphorus remobilization independent of nitric oxide and ethylene in rice (Oryza sativa)”
e2“Exogenous ABA negatively regulated root and shoot soluble P contents”
e4“inhibiting P deficiency-induced increases in pectin methylesterase activity and expression of the phosphate transporter gene-OsPT6”
Claim · model-written summary
Exogenous ABA inhibited the P deficiency-induced increase in expression of the phosphate transporter gene OsPT6 in rice.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- Exogenous ABAe2
- Gene
- OsPT6e4
- Outcome
- expression of the phosphate transporter gene-OsPT6e4
- Direction
- inhibitinge4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscisic acid is involved in root cell wall phosphorus remobilization independent of nitric oxide and ethylene in rice (Oryza sativa)”
e2“Exogenous ABA negatively regulated root and shoot soluble P contents”
e4“inhibiting P deficiency-induced increases in pectin methylesterase activity and expression of the phosphate transporter gene-OsPT6”
Claim · model-written summary
The NO donor sodium nitroprusside had no effect on ABA accumulation in rice.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- sodium nitroprussidee5
- Outcome
- ABA accumulatione5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscisic acid is involved in root cell wall phosphorus remobilization independent of nitric oxide and ethylene in rice (Oryza sativa)”
e5“neither the nitric oxide (NO) donor sodium nitroprusside nor ethylene precursor 1-aminocyclopropane-1-carboxylic acid had any effect on ABA accumulation”
Claim · model-written summary
The ethylene precursor 1-aminocyclopropane-1-carboxylic acid had no effect on ABA accumulation in rice.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- 1-aminocyclopropane-1-carboxylic acide5
- Outcome
- ABA accumulatione5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscisic acid is involved in root cell wall phosphorus remobilization independent of nitric oxide and ethylene in rice (Oryza sativa)”
e5“neither the nitric oxide (NO) donor sodium nitroprusside nor ethylene precursor 1-aminocyclopropane-1-carboxylic acid had any effect on ABA accumulation”
Claim · model-written summary
Application of ABA had no effect on NO production and ethylene emission in rice.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- application of ABAe6
- Outcome
- NO production and ethylene emissione6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscisic acid is involved in root cell wall phosphorus remobilization independent of nitric oxide and ethylene in rice (Oryza sativa)”
e6“application of ABA or the ABA inhibitor fluridone also had no effect on NO production and ethylene emission”
Claim · model-written summary
The ABA inhibitor fluridone had no effect on NO production and ethylene emission in rice.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- ABA inhibitor fluridonee6
- Outcome
- NO production and ethylene emissione6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscisic acid is involved in root cell wall phosphorus remobilization independent of nitric oxide and ethylene in rice (Oryza sativa)”
e6“application of ABA or the ABA inhibitor fluridone also had no effect on NO production and ethylene emission”
Claim · model-written summary
Under P deficiency, NO levels increased as quickly as ABA levels decreased in rice.
- Taxon
- rice (Oryza sativa)Oryza sativat0
- Treatment
- P deficiencye7
- Outcome
- NO levelse7
- Direction
- increasee7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscisic acid is involved in root cell wall phosphorus remobilization independent of nitric oxide and ethylene in rice (Oryza sativa)”
e7“Under P deficiency, NO levels increase as quickly as ABA levels decrease”
The same questions in other papers
(+)-abscisic acid · physiology: hormones · Oryza sativa (rice)Results differ
4 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
9 papers more in this group
See all 13 papers →1-aminocyclopropanecarboxylic acid · physiology: hormones · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →Fluridone · physiology: hormones · Oryza sativa (rice)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
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.