Abstract
Drought and salt exposure are among the most prevalent and severe abiotic stressors causing serious agricultural yield losses, alone and in combination. Little is known about differences and similarities in the effects of these two stress factors on plant metabolic regulation, particularly on nitrogen metabolism. Here, we studied the effects of water deprivation and salt exposure on water relations and nitrogen metabolites in leaves and roots of date palm seedlings. Both, water deprivation and salt exposure had no significant effects on plant water content or stable carbon (C) and nitrogen (N) isotope signatures. Significant effects of water deprivation on total C and N concentrations were only observed in roots, i.e., decreased total C and increased total N concentrations. Whereas salt exposure initially decreased total C and increased total N concentrations significantly in roots, foliar total C concentration was increased upon prolonged exposure. Initially C/N ratios declined in roots of plants from both treatments and upon prolonged salt exposure also in the leaves. Neither treatment affected soluble protein and structural N concentrations in leaves or roots, but resulted in the accumulation of most amino acids, except for glutamate and tryptophan, which remained stable, and serine, which decreased, in roots. Accumulation of the most abundant amino acids, lysine and proline, was observed in roots under both treatments, but in leaves only upon salt exposure. This finding indicates a similar role of these amino acids as compatible solutes in the roots in response to salt und drought, but not in the leaves. Upon prolonged treatment, amino acid concentrations returned to levels found in unstressed plants in leaves of water deprived, but not salt exposed, plants. The present results show both water deprivation and salt exposure strongly impact N metabolism of date palm seedlings, but in a different manner in leaves and roots.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 15
Claim · model-written summary
Neither water deprivation nor salt exposure had significant effects on plant water content or on stable carbon and nitrogen isotope signatures of date palm seedlings.
- Taxon
- date palm
Phoenix dactyliferat0 - Treatment
- water deprivation and salt exposuree0
- Outcome
- plant water content or stable carbon (C) and nitrogen (N) isotope signaturese0
- Direction
- no significant effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“Both, water deprivation and salt exposure had no significant effects on plant water content or stable carbon (C) and nitrogen (N) isotope signatures”
Claim · model-written summary
Water deprivation decreased total C concentration in date palm roots, the only organ with significant effects on total C and N.
- Taxon
- date palmPhoenix dactyliferat0
- Organ / stage
- rootse0
- Treatment
- water deprivatione0
- Outcome
- total Ce0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“Significant effects of water deprivation on total C and N concentrations were only observed in roots, i.e., decreased total C and increased total N concentrations”
Claim · model-written summary
Water deprivation increased total N concentration in date palm roots.
- Taxon
- date palmPhoenix dactyliferat0
- Organ / stage
- rootse0
- Treatment
- water deprivatione0
- Outcome
- total N concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“Significant effects of water deprivation on total C and N concentrations were only observed in roots, i.e., decreased total C and increased total N concentrations”
Claim · model-written summary
Salt exposure initially decreased total C concentration significantly in date palm roots.
- Taxon
- date palmPhoenix dactyliferat0
- Organ / stage
- rootse0
- Treatment
- salt exposuree0
- Outcome
- total Ce0
- Direction
- decreasede0
- Qualifier
- initiallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“salt exposure initially decreased total C and increased total N concentrations significantly in roots”
Claim · model-written summary
Salt exposure initially increased total N concentration significantly in date palm roots.
- Taxon
- date palmPhoenix dactyliferat0
- Organ / stage
- rootse0
- Treatment
- salt exposuree0
- Outcome
- total N concentrationse0
- Direction
- increasede0
- Qualifier
- initiallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“salt exposure initially decreased total C and increased total N concentrations significantly in roots”
Claim · model-written summary
Foliar total C concentration was increased by prolonged salt exposure.
- Taxon
- date palmPhoenix dactyliferat0
- Treatment
- salt exposuree0
- Outcome
- foliar total C concentratione1
- Direction
- increasede1
- Qualifier
- upon prolonged exposuree1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“salt exposure initially decreased total C”
e1“foliar total C concentration was increased upon prolonged exposure”
Claim · model-written summary
C/N ratios initially declined in roots of plants from both treatments, and in leaves upon prolonged salt exposure.
- Taxon
- date palmPhoenix dactyliferat0
- Organ / stage
- rootse0
- Treatment
- both treatmentse0
- Outcome
- C/N ratiose0
- Direction
- declinede0
- Qualifier
- upon prolonged salt exposure also in the leavese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“Initially C/N ratios declined in roots of plants from both treatments and upon prolonged salt exposure also in the leaves”
Claim · model-written summary
Neither water deprivation nor salt exposure affected soluble protein and structural N concentrations in date palm leaves or roots.
- Taxon
- date palmPhoenix dactyliferat0
- Organ / stage
- leaves or rootse0
- Treatment
- water deprivation and salt exposuree1
- Outcome
- soluble protein and structural N concentrationse0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“Neither treatment affected soluble protein and structural N concentrations in leaves or roots”
e1“Both, water deprivation and salt exposure”
Claim · model-written summary
Both treatments caused accumulation of most amino acids in date palm roots.
- Taxon
- date palmPhoenix dactyliferat0
- Organ / stage
- rootse0
- Treatment
- water deprivation and salt exposuree1
- Outcome
- most amino acidse0
- Direction
- accumulatione0
- Qualifier
- except for glutamate and tryptophane0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“resulted in the accumulation of most amino acids, except for glutamate and tryptophan, which remained stable, and serine, which decreased, in roots”
e1“Both, water deprivation and salt exposure”
Claim · model-written summary
Glutamate and tryptophan remained stable in date palm roots under both treatments.
- Taxon
- date palmPhoenix dactyliferat0
- Organ / stage
- rootse0
- Treatment
- water deprivation and salt exposuree1
- Outcome
- glutamate and tryptophane0
- Direction
- remained stablee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“resulted in the accumulation of most amino acids, except for glutamate and tryptophan, which remained stable, and serine, which decreased, in roots”
e1“Both, water deprivation and salt exposure”
Claim · model-written summary
Serine decreased in date palm roots under both treatments.
- Taxon
- date palmPhoenix dactyliferat0
- Organ / stage
- rootse0
- Treatment
- water deprivation and salt exposuree1
- Outcome
- serinee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“resulted in the accumulation of most amino acids, except for glutamate and tryptophan, which remained stable, and serine, which decreased, in roots”
e1“Both, water deprivation and salt exposure”
Claim · model-written summary
The most abundant amino acids, lysine and proline, accumulated in roots under both treatments but in leaves only upon salt exposure.
- Taxon
- date palmPhoenix dactyliferat0
- Organ / stage
- rootse0
- Treatment
- both treatmentse0
- Outcome
- most abundant amino acids, lysine and prolinee0
- Direction
- Accumulatione0
- Qualifier
- in leaves only upon salt exposuree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“Accumulation of the most abundant amino acids, lysine and proline, was observed in roots under both treatments, but in leaves only upon salt exposure”
Claim · model-written summary
The authors interpret the accumulation of lysine and proline as a similar role as compatible solutes in roots under salt and drought, but not in leaves.
- Taxon
- date palmPhoenix dactyliferat0
- Organ / stage
- rootse0
- Treatment
- salt und droughte0
- Outcome
- role of these amino acidse0
- Qualifier
- compatible solutese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“This finding indicates a similar role of these amino acids as compatible solutes in the roots in response to salt und drought, but not in the leaves”
Claim · model-written summary
With prolonged treatment, amino acid concentrations in leaves of water-deprived plants returned to levels of unstressed plants, but not in salt-exposed plants.
- Taxon
- date palmPhoenix dactyliferat0
- Organ / stage
- leavese0
- Treatment
- water deprivede0
- Outcome
- amino acid concentrationse0
- Direction
- returnede0
- Qualifier
- not salt exposede0
- Comparator
- unstressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“Upon prolonged treatment, amino acid concentrations returned to levels found in unstressed plants in leaves of water deprived, but not salt exposed, plants”
Claim · model-written summary
The authors conclude that both water deprivation and salt exposure strongly impact N metabolism of date palm seedlings, but differently in leaves and roots.
- Taxon
- date palmPhoenix dactyliferae0
- Treatment
- water deprivation and salt exposuree0
- Outcome
- N metabolisme0
- Qualifier
- in a different manner in leaves and rootse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“date palm”
e0“both water deprivation and salt exposure strongly impact N metabolism of date palm seedlings, but in a different manner in leaves and roots”
The same questions in other papers
salinity · physiology: osmolytes · Phoenix dactylifera (date palm)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
1 paper more in this group
See all 5 papers →salinity · soil: physics · Phoenix dactylifera (date palm)Results agree
1 paper in the same direction as this paper
- no effect
salinity · molecular: metabolites · Phoenix dactylifera (date palm)Results agree
4 papers in the same direction as this paper
- negative
- negative
- negative
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.