Abstract
Melatonin (MT) has been implicated in the plant response to phosphorus (P) stress; however, the precise molecular mechanisms involved remain unclear. This study investigated whether MT controls internal P distribution and root cell wall P remobilization in rice. Rice was treated with varying MT and P levels and analyzed using biochemical and molecular techniques to study phosphorus utilization. The results demonstrated that low P levels lead to a rapid increase in endogenous MT levels in rice roots. Furthermore, the exogenous application of MT significantly improved rice tolerance to P deficiency, as evidenced by the increased biomass and reduced proportion of roots to shoots under P-deficient conditions. MT application also mitigated the decrease in P content regardless in both the roots and shoots. Mechanistically, MT accelerated the reutilization of P, particularly in the root pectin fraction, leading to increased soluble P liberation. In addition, MT enhanced the expression of OsPT8, a gene involved in root-to-shoot P translocation. Furthermore, we observed that MT induced the production of nitric oxide (NO) in P-deficient rice roots and that the mitigating effect of MT on P deficiency was compromised in the presence of the NO inhibitor, c-PTIO, implying that NO is involved in the MT-facilitated mitigation of P deficiency in rice. Overall, our findings highlight the potential of MT as a promising strategy for enhancing rice tolerance to P deficiency and improving P use efficiency in agricultural practices.
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Claims 9
Claim · model-written summary
Low phosphorus rapidly raises endogenous melatonin in rice roots.
- Taxon
- Rice
Oryza sativat0 - Organ / stage
- rice rootse0
- Treatment
- low P levelse0
- Outcome
- endogenous MT levelse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low P levels lead to a rapid increase in endogenous MT levels in rice roots”
t0“Melatonin Increases Root Cell Wall Phosphorus Reutilization via an NO Dependent Pathway in Rice (Oryza sativa)”
Claim · model-written summary
Applied melatonin increases rice biomass under phosphorus deficiency.
- Taxon
- RiceOryza sativat0
- Treatment
- exogenous application of MTe0
- Outcome
- biomasse0
- Direction
- increasede0
- Qualifier
- under P-deficient conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the exogenous application of MT significantly improved rice tolerance to P deficiency, as evidenced by the increased biomass and reduced proportion of roots to shoots under P-deficient conditions”
t0“Melatonin Increases Root Cell Wall Phosphorus Reutilization via an NO Dependent Pathway in Rice (Oryza sativa)”
Claim · model-written summary
Applied melatonin reduces the root-to-shoot proportion under phosphorus deficiency.
- Taxon
- RiceOryza sativat0
- Treatment
- exogenous application of MTe0
- Outcome
- proportion of roots to shootse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the exogenous application of MT significantly improved rice tolerance to P deficiency, as evidenced by the increased biomass and reduced proportion of roots to shoots under P-deficient conditions”
t0“Melatonin Increases Root Cell Wall Phosphorus Reutilization via an NO Dependent Pathway in Rice (Oryza sativa)”
Claim · model-written summary
Melatonin mitigates the decrease in root and shoot phosphorus content.
- Taxon
- RiceOryza sativat0
- Treatment
- MT applicatione0
- Outcome
- P content regardless in both the roots and shootse0
- Direction
- mitigated the decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MT application also mitigated the decrease in P content regardless in both the roots and shoots”
t0“Melatonin Increases Root Cell Wall Phosphorus Reutilization via an NO Dependent Pathway in Rice (Oryza sativa)”
Claim · model-written summary
Melatonin accelerates phosphorus reutilization in the root pectin fraction.
- Taxon
- RiceOryza sativat0
- Organ / stage
- root pectin fractione0
- Treatment
- MTe0
- Outcome
- reutilization of Pe0
- Direction
- acceleratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MT accelerated the reutilization of P, particularly in the root pectin fraction”
t0“Melatonin Increases Root Cell Wall Phosphorus Reutilization via an NO Dependent Pathway in Rice (Oryza sativa)”
Claim · model-written summary
Melatonin increases soluble phosphorus liberation.
- Taxon
- RiceOryza sativat0
- Outcome
- soluble P liberatione0
- Direction
- increasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leading to increased soluble P liberation”
t0“Melatonin Increases Root Cell Wall Phosphorus Reutilization via an NO Dependent Pathway in Rice (Oryza sativa)”
Claim · model-written summary
Melatonin enhances OsPT8 expression.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MT enhanced the expression of OsPT8”
t0“Melatonin Increases Root Cell Wall Phosphorus Reutilization via an NO Dependent Pathway in Rice (Oryza sativa)”
Claim · model-written summary
Melatonin induces nitric oxide production in phosphorus-deficient rice roots.
- Taxon
- RiceOryza sativat0
- Organ / stage
- P-deficient rice rootse0
- Treatment
- MTe0
- Outcome
- production of nitric oxide (NO)e0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MT induced the production of nitric oxide (NO) in P-deficient rice roots”
t0“Melatonin Increases Root Cell Wall Phosphorus Reutilization via an NO Dependent Pathway in Rice (Oryza sativa)”
Claim · model-written summary
The NO inhibitor c-PTIO compromises melatonin mitigation of phosphorus deficiency.
- Taxon
- RiceOryza sativat0
- Treatment
- NO inhibitor, c-PTIOe0
- Outcome
- mitigating effect of MT on P deficiencye0
- Direction
- compromisede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the mitigating effect of MT on P deficiency was compromised in the presence of the NO inhibitor, c-PTIO”
t0“Melatonin Increases Root Cell Wall Phosphorus Reutilization via an NO Dependent Pathway in Rice (Oryza sativa)”
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See all 34 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.