Abstract
The intrinsic variability of volatile organic compound emissions and photosynthetic parameters in response to two drying cycles was investigated on Quercus suber L. saplings originating from three Tunisian populations native to contrasting climates. Emissions mainly included monoterpenes plus traces of sesquiterpenes and methylsalicylate that steadily decreased during the experiment unrelated to treatments. Instead, monoterpene emissions increased by 30% during a first moderate drought and remained enhanced after rewatering, while CO 2 –H 2 O gas exchange was reduced by 30%. A second severe drought decreased monoterpene emissions to about two third of controls, strongly inhibited gas exchange and photochemical efficiency, and caused a partial loss of chlorophyll. Rewatering led to only partial recovery of emissions and photosynthetic parameters of stressed plants whose biomasses and leaf nitrogen and chlorophyll contents were lower than in control plants. There was no clear difference among populations in volatile organic compound emissions or photosynthetic parameters. However, the population inhabiting the most arid region had intrinsically smaller leaves with lower specific leaf masses and higher drought-related leaf losses than populations native to less arid climates. These results indicate an adaptive shift from stress-tolerating towards stress-avoiding ecotypes under arid climates involving mainly morphological adaptations without apparent differentiation in volatile organic compound production, probably because of its high phenological plasticity.
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Claims 13
Claim · model-written summary
Monoterpenes dominated volatile emissions, with traces of sesquiterpenes and methylsalicylate.
- Taxon
- Quercus suber L.
Quercus subere1 - Outcome
- Emissionse0
- Qualifier
- mainly included monoterpenes plus traces of sesquiterpenes and methylsalicylatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Emissions mainly included monoterpenes plus traces of sesquiterpenes and methylsalicylate that steadily decreased during the experiment unrelated to treatments.”
e1“Quercus suber L. saplings”
Claim · model-written summary
Sesquiterpene and methylsalicylate emissions declined steadily independently of treatment.
- Taxon
- Quercus suber L.Quercus subere1
- Outcome
- Emissionse0
- Qualifier
- steadily decreased during the experiment unrelated to treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Emissions mainly included monoterpenes plus traces of sesquiterpenes and methylsalicylate that steadily decreased during the experiment unrelated to treatments.”
e1“Quercus suber L. saplings”
Claim · model-written summary
Moderate drought increased monoterpene emissions by 30%, persisting after rewatering.
- Taxon
- Quercus suber L.Quercus subere1
- Treatment
- first moderate droughte0
- Outcome
- monoterpene emissionse0
- Direction
- increasede0
- Value
- 30%e0
- Qualifier
- remained enhanced after rewateringe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“monoterpene emissions increased by 30% during a first moderate drought and remained enhanced after rewatering”
e1“Quercus suber L. saplings”
Claim · model-written summary
Moderate drought reduced carbon dioxide-water gas exchange by 30%.
- Taxon
- Quercus suber L.Quercus subere1
- Treatment
- first moderate droughte2
- Outcome
- CO 2 –H 2 O gas exchangee0
- Direction
- reducede0
- Value
- 30%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while CO 2 –H 2 O gas exchange was reduced by 30%.”
e1“Quercus suber L. saplings”
e2“during a first moderate drought”
Claim · model-written summary
Severe drought reduced monoterpene emissions to about two thirds of control.
- Taxon
- Quercus suber L.Quercus subere1
- Treatment
- second severe droughte0
- Outcome
- monoterpene emissionse0
- Direction
- decreasede0
- Value
- about two thirde0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A second severe drought decreased monoterpene emissions to about two third of controls”
e1“Quercus suber L. saplings”
Claim · model-written summary
Severe drought strongly inhibited gas exchange and photochemical efficiency.
- Taxon
- Quercus suber L.Quercus subere1
- Treatment
- second severe droughte0
- Outcome
- gas exchange and photochemical efficiencye0
- Direction
- strongly inhibitede0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A second severe drought decreased monoterpene emissions to about two third of controls, strongly inhibited gas exchange and photochemical efficiency, and caused a partial loss of chlorophyll.”
e1“Quercus suber L. saplings”
Claim · model-written summary
Severe drought caused partial chlorophyll loss.
- Taxon
- Quercus suber L.Quercus subere1
- Treatment
- second severe droughte0
- Outcome
- chlorophylle0
- Direction
- partial losse0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A second severe drought decreased monoterpene emissions to about two third of controls, strongly inhibited gas exchange and photochemical efficiency, and caused a partial loss of chlorophyll.”
e1“Quercus suber L. saplings”
Claim · model-written summary
Rewatering yielded only partial recovery of emissions and photosynthetic parameters.
- Taxon
- Quercus suber L.Quercus subere1
- Outcome
- emissions and photosynthetic parameterse0
- Qualifier
- only partial recoverye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rewatering led to only partial recovery of emissions and photosynthetic parameters of stressed plants”
e1“Quercus suber L. saplings”
Claim · model-written summary
Stressed plants had less biomass than controls following rewatering.
- Taxon
- Quercus suber L.Quercus subere1
- Outcome
- biomassese0
- Direction
- lowere0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stressed plants whose biomasses and leaf nitrogen and chlorophyll contents were lower than in control plants.”
e1“Quercus suber L. saplings”
Claim · model-written summary
Stressed plants had lower leaf nitrogen and chlorophyll than controls.
- Taxon
- Quercus suber L.Quercus subere1
- Outcome
- leaf nitrogen and chlorophyll contentse0
- Direction
- lowere0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stressed plants whose biomasses and leaf nitrogen and chlorophyll contents were lower than in control plants.”
e1“Quercus suber L. saplings”
Claim · model-written summary
Populations showed no clear difference in volatile emissions or photosynthetic parameters.
- Taxon
- Quercus suber L.Quercus subere1
- Outcome
- volatile organic compound emissions or photosynthetic parameterse0
- Qualifier
- no clear difference among populationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no clear difference among populations in volatile organic compound emissions or photosynthetic parameters.”
e1“Quercus suber L. saplings”
Claim · model-written summary
The most arid population had smaller leaves and lower specific leaf mass than less arid populations.
- Taxon
- Quercus suber L.Quercus subere1
- Organ / stage
- leavese0
- Outcome
- specific leaf massese0
- Direction
- lowere0
- Setting
- most arid regione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the population inhabiting the most arid region had intrinsically smaller leaves with lower specific leaf masses”
e1“Quercus suber L. saplings”
Claim · model-written summary
The most arid population had greater drought-related leaf loss than less arid populations.
- Taxon
- Quercus suber L.Quercus subere1
- Outcome
- drought-related leaf lossese0
- Direction
- highere0
- Comparator
- populations native to less arid climatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher drought-related leaf losses than populations native to less arid climates.”
e1“Quercus suber L. saplings”
The same questions in other papers
drought · physiology: pigments · Quercus suber (cork oak)Results agree
2 papers in the same direction as this paper
- negative
- negative
drought · physiology: photosynthesis · Quercus suber (cork oak)Results agree
5 papers in the same direction as this paper
- negative
- negative
- negative
2 papers more in this group
See all 6 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.