Abstract
This study extends our prior research on drought responses in three date palm cultivars (Khalas, Reziz, and Sheshi) under controlled conditions. Here, we investigated their drought stress adaptive strategies under ambient environment. Under natural field drought conditions, three date palm cultivars experienced significantly ( p ≤ 0.05) varying regulations in their physiological attributes. Specifically, chlorophyll content, leaf RWC, photosynthesis, stomatal conductance, and transpiration reduced significantly, while intercellular CO 2 concentration and water use efficiency increased. Through suppression subtraction hybridization (SSH), a rich repertoire (1026) of drought-responsive expressed sequence tags (ESTs) were identified: 300 in Khalas, 343 in Reziz, and 383 in Sheshi. Functional analysis of ESTs, including gene annotation and KEGG pathways elucidation, unveiled that these cultivars withstand drought by leveraging indigenous and multifaceted pathways. While some pathways aligned with previously reported drought resilience mechanism observed under controlled conditions, several new indigenous pathways were noted, pinpointing cultivar-specific adaptations. ESTs identified in three date palm cultivars were enriched through GSEA analysis. Khalas exhibited enrichment in cellular and metabolic processes, catalytic activity, and metal ion binding. Reziz showed enrichment in biological regulation, metabolic processes, signaling, and nuclear functions. Conversely, Sheshi displayed enrichment in organelle, photosynthetic, and ribosomal components. Notably, ca. 50% of the ESTs were unique and novel, underlining the complexity of their adaptive genetic toolkit. Overall, Khalas displayed superior drought tolerance, followed by Reziz and Sheshi, highlighting cultivar-specific variability in adaptation. Conclusively, date palm cultivars exhibited diverse genetic and physiological strategies to cope with drought, demonstrating greater complexity in their resilience compared to controlled settings.
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Claims 12
Claim · model-written summary
Chlorophyll content, leaf RWC and photosynthesis significantly declined under field drought.
- Taxon
- date palm
Phoenix dactyliferat0 - Treatment
- natural field drought conditionse0
- Outcome
- chlorophyll content, leaf RWC, photosynthesise0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under natural field drought conditions, three date palm cultivars experienced significantly ( p ≤ 0.05) varying regulations in their physiological attributes. Specifically, chlorophyll content, leaf RWC, photosynthesis, stomatal conductance, and transpiration reduced significantly”
t0“date palm”
Claim · model-written summary
Stomatal conductance and transpiration significantly declined under field drought.
- Taxon
- date palmPhoenix dactyliferat0
- Treatment
- natural field drought conditionse0
- Outcome
- stomatal conductance, and transpiratione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under natural field drought conditions, three date palm cultivars experienced significantly ( p ≤ 0.05) varying regulations in their physiological attributes. Specifically, chlorophyll content, leaf RWC, photosynthesis, stomatal conductance, and transpiration reduced significantly”
t0“date palm”
Claim · model-written summary
Intercellular CO 2 concentration and water use efficiency increased under field drought.
- Taxon
- date palmPhoenix dactyliferat0
- Treatment
- natural field drought conditionse0
- Outcome
- intercellular CO 2 concentration and water use efficiencye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under natural field drought conditions, three date palm cultivars experienced significantly ( p ≤ 0.05) varying regulations in their physiological attributes. Specifically, chlorophyll content, leaf RWC, photosynthesis, stomatal conductance, and transpiration reduced significantly, while intercellular CO 2 concentration and water use efficiency increased.”
t0“date palm”
Claim · model-written summary
Suppression subtraction hybridization identified 300 drought-responsive ESTs in Khalas.
- Taxon
- date palmPhoenix dactyliferat0
- Material
- Khalase0
- Outcome
- drought-responsive expressed sequence tags (ESTs)e0
- Value
- 300e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1026) of drought-responsive expressed sequence tags (ESTs) were identified: 300 in Khalas, 343 in Reziz, and 383 in Sheshi.”
t0“date palm”
Claim · model-written summary
Suppression subtraction hybridization identified 343 drought-responsive ESTs in Reziz.
- Taxon
- date palmPhoenix dactyliferat0
- Material
- Rezize0
- Outcome
- drought-responsive expressed sequence tags (ESTs)e0
- Value
- 343e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought-responsive expressed sequence tags (ESTs) were identified: 300 in Khalas, 343 in Reziz, and 383 in Sheshi.”
t0“date palm”
Claim · model-written summary
Suppression subtraction hybridization identified 383 drought-responsive ESTs in Sheshi.
- Taxon
- date palmPhoenix dactyliferat0
- Material
- Sheshie0
- Outcome
- drought-responsive expressed sequence tags (ESTs)e0
- Value
- 383e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought-responsive expressed sequence tags (ESTs) were identified: 300 in Khalas, 343 in Reziz, and 383 in Sheshi.”
t0“date palm”
Claim · model-written summary
Functional analysis identified indigenous and cultivar-specific drought-adaptation pathways.
- Taxon
- date palmPhoenix dactyliferat0
- Outcome
- indigenous and multifaceted pathwayse0
- Qualifier
- cultivar-specific adaptationse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these cultivars withstand drought by leveraging indigenous and multifaceted pathways.”
e1“several new indigenous pathways were noted, pinpointing cultivar-specific adaptations.”
t0“date palm”
Claim · model-written summary
Khalas ESTs were enriched in cellular and metabolic processes, catalytic activity and metal ion binding.
- Taxon
- date palmPhoenix dactyliferat0
- Material
- Khalase0
- Outcome
- cellular and metabolic processes, catalytic activity, and metal ion bindinge0
- Direction
- enrichmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Khalas exhibited enrichment in cellular and metabolic processes, catalytic activity, and metal ion binding.”
t0“date palm”
Claim · model-written summary
Reziz ESTs were enriched in biological regulation, metabolic processes, signaling and nuclear functions.
- Taxon
- date palmPhoenix dactyliferat0
- Material
- Rezize0
- Outcome
- biological regulation, metabolic processes, signaling, and nuclear functionse0
- Direction
- enrichmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reziz showed enrichment in biological regulation, metabolic processes, signaling, and nuclear functions.”
t0“date palm”
Claim · model-written summary
Sheshi ESTs were enriched in organelle, photosynthetic and ribosomal components.
- Taxon
- date palmPhoenix dactyliferat0
- Material
- Sheshie0
- Outcome
- organelle, photosynthetic, and ribosomal componentse0
- Direction
- enrichmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sheshi displayed enrichment in organelle, photosynthetic, and ribosomal components.”
t0“date palm”
Claim · model-written summary
About 50% of identified ESTs were unique and novel.
- Taxon
- date palmPhoenix dactyliferat0
- Outcome
- ESTs were unique and novele0
- Value
- ca. 50%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ca. 50% of the ESTs were unique and novel”
t0“date palm”
Claim · model-written summary
Khalas showed greater drought tolerance than Reziz and Sheshi.
- Taxon
- date palmPhoenix dactyliferat0
- Material
- Khalase0
- Outcome
- drought tolerancee0
- Direction
- superiore0
- Comparator
- Reziz and Sheshie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Khalas displayed superior drought tolerance, followed by Reziz and Sheshi”
t0“date palm”
The same questions in other papers
drought · physiology: gas exchange · Phoenix dactylifera (date palm)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
drought · physiology: photosynthesis · Phoenix dactylifera (date palm)Results agree
2 papers in the same direction as this paper
- 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.