Abstract
Understanding how olive cultivars respond to recurrent drought is critical to develop climate-resilient cropping systems. This study investigated the physiological, biochemical, and molecular responses of three autochthonous cultivars (Ortice, Ortolana, Racioppella) exposed to repeated water deficit, with and without inoculation of a PGPR consortium ( Bacillus subtilis , Pseudomonas fluorescens ). Under stress, Ortolana maintained stable water status, Ortice exhibited progressive adaptive plasticity, while Racioppella showed heightened stress sensitivity with limited recovery capacity. Microbial inoculation enhanced the accumulation of osmolytes (proline, soluble sugars) and antioxidants (phenols, flavonoids), and mitigated pigment degradation. At the molecular level, drought induced strong upregulation of NCED1 and repression of PP2C , while inoculated plants displayed a tempered transcriptional response, suggesting effective priming. Upon the second stress exposure, LEA46 and DHN1 expression increased markedly, particularly in Ortice, indicating activation of stress memory. Expression of OePIP2.1 aquaporin declined under drought, consistent with reduced membrane water permeability; however, cultivar-specific patterns emerged, implying differential regulatory strategies. The microbial consortium appeared to reinforce both primed and memory-based responses. These findings demonstrate that integrating tolerant genotypes with functional microbial inoculants enhances drought resilience through coordinated physiological regulation and timely modulation of stress-responsive genes, supporting sustainable olive production in water-limited environments.
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Claims 15
Claim · model-written summary
Under drought Ortolana maintained stable water status.
- Taxon
- olive
Olea europaeat0 - Material
- Ortolanae0
- Outcome
- stable water statuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under stress, Ortolana maintained stable water status”
t0“olive cultivars”
Claim · model-written summary
Under drought Ortice showed progressive adaptive plasticity.
- Taxon
- oliveOlea europaeat0
- Material
- Orticee0
- Outcome
- progressive adaptive plasticitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ortice exhibited progressive adaptive plasticity”
t0“olive cultivars”
Claim · model-written summary
Under drought Racioppella showed heightened stress sensitivity with limited recovery.
- Taxon
- oliveOlea europaeat0
- Material
- Racioppellae0
- Outcome
- heightened stress sensitivity with limited recovery capacitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Racioppella showed heightened stress sensitivity with limited recovery capacity”
t0“olive cultivars”
Claim · model-written summary
Microbial inoculation enhanced osmolyte accumulation.
- Taxon
- oliveOlea europaeat0
- Treatment
- Microbial inoculatione0
- Outcome
- accumulation of osmolytes (proline, soluble sugars)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microbial inoculation enhanced the accumulation of osmolytes (proline, soluble sugars)”
t0“olive cultivars”
Claim · model-written summary
Microbial inoculation enhanced antioxidant accumulation.
- Taxon
- oliveOlea europaeat0
- Treatment
- Microbial inoculatione0
- Outcome
- antioxidants (phenols, flavonoids)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microbial inoculation enhanced the accumulation of osmolytes (proline, soluble sugars) and antioxidants (phenols, flavonoids)”
t0“olive cultivars”
Claim · model-written summary
Microbial inoculation mitigated pigment degradation.
- Taxon
- oliveOlea europaeat0
- Treatment
- Microbial inoculatione0
- Outcome
- pigment degradatione0
- Direction
- mitigatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microbial inoculation enhanced the accumulation of osmolytes (proline, soluble sugars) and antioxidants (phenols, flavonoids), and mitigated pigment degradation”
t0“olive cultivars”
Claim · model-written summary
Drought upregulated NCED1.
- Taxon
- oliveOlea europaeat0
- Treatment
- droughte0
- Gene
- NCED1e0
- Outcome
- upregulation of NCED1e0
- Direction
- upregulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought induced strong upregulation of NCED1”
t0“olive cultivars”
Claim · model-written summary
Drought repressed PP2C.
- Taxon
- oliveOlea europaeat0
- Treatment
- droughte0
- Gene
- PP2Ce0
- Outcome
- repression of PP2Ce0
- Direction
- repressione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought induced strong upregulation of NCED1 and repression of PP2C”
t0“olive cultivars”
Claim · model-written summary
Inoculated plants had a tempered transcriptional response.
- Taxon
- oliveOlea europaeat0
- Treatment
- inoculatede0
- Outcome
- transcriptional responsee0
- Direction
- temperede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculated plants displayed a tempered transcriptional response”
t0“olive cultivars”
Claim · model-written summary
Second stress exposure increased LEA46 expression, particularly in Ortice.
- Taxon
- oliveOlea europaeat0
- Material
- Orticee0
- Treatment
- second stress exposuree0
- Gene
- LEA46e0
- Outcome
- expressione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Upon the second stress exposure, LEA46 and DHN1 expression increased markedly, particularly in Ortice”
t0“olive cultivars”
Claim · model-written summary
Second stress exposure increased DHN1 expression, particularly in Ortice.
- Taxon
- oliveOlea europaeat0
- Material
- Orticee0
- Treatment
- second stress exposuree0
- Gene
- DHN1e0
- Outcome
- DHN1 expressione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Upon the second stress exposure, LEA46 and DHN1 expression increased markedly, particularly in Ortice”
t0“olive cultivars”
Claim · model-written summary
OePIP2.1 aquaporin expression declined under drought.
- Taxon
- oliveOlea europaeat0
- Treatment
- droughte0
- Gene
- OePIP2.1 aquaporine0
- Outcome
- Expression of OePIP2.1 aquaporine0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Expression of OePIP2.1 aquaporin declined under drought”
t0“olive cultivars”
Claim · model-written summary
OePIP2.1 expression showed cultivar-specific patterns.
- Taxon
- oliveOlea europaeat0
- Gene
- OePIP2.1 aquaporine1
- Outcome
- cultivar-specific patternse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cultivar-specific patterns emerged”
e1“Expression of OePIP2.1 aquaporin declined under drought”
t0“olive cultivars”
Claim · model-written summary
The consortium appeared to reinforce primed and memory-based drought responses.
- Taxon
- oliveOlea europaeat0
- Treatment
- microbial consortiume0
- Outcome
- primed and memory-based responsese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“microbial consortium appeared to reinforce both primed and memory-based responses”
t0“olive cultivars”
Claim · model-written summary
Integrating tolerant genotypes with microbial inoculants enhanced drought resilience.
- Taxon
- oliveOlea europaeat0
- Material
- tolerant genotypese0
- Treatment
- functional microbial inoculantse0
- Outcome
- drought resiliencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“integrating tolerant genotypes with functional microbial inoculants enhances drought resilience”
t0“olive cultivars”
The same questions in other papers
inoculation · quality: phytochemicals · Olea europaea (common olive)Positive and negative results
2 in the opposite direction
- negative
- negative
inoculation · molecular: expression · Olea europaea (common olive)Results agree
1 paper in the same direction as this paper
- positive
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.