Abstract
The objective of this study was to understand and characterize the physiological and biochemical tolerance mechanisms of Argania spinosa under drought stress for selection tolerant ecotypes. Significant differences were observed among ecotypes in indices of leaf water status studied: stomatal conductance (gs), predawn leaf water potential (Ψpd) and leaf relative water content. There was a significant decrease in these physiological traits with increasing degree of drought stress in all ecotypes. Drought stress significantly increased endogenous H2O2 and lipid peroxidation. Moderate and severe drought stress increased significantly the catalase, superoxide dismutase, peroxidase, polyphenoloxidase and lipoxygenase activities, depending on time. Their constitutive activities were higher in inland ecotypes than in coastal ecotypes. According to canonical discriminant analysis, the inland ecotypes were essentially distinguished from the coastal ecotypes by the following physiological and biochemical traits: Ψpd, gs, polyphenol oxidase, superoxide dismutase and malonyldialdehyde. Inland ecotypes seem to be more tolerant to drought stress than coastal ecotypes.
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Claims 7
Claim · model-written summary
Ecotypes differed significantly in stomatal conductance, predawn leaf water potential, and relative leaf water content.
- Taxon
- Argania spinosa
Sideroxylon spinosume1 - Material
- ecotypese0
- Outcome
- stomatal conductance (gs), predawn leaf water potential (Ψpd) and leaf relative water contente0
- Direction
- differencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant differences were observed among ecotypes in indices of leaf water status studied: stomatal conductance (gs), predawn leaf water potential (Ψpd) and leaf relative water content”
e1“Argania spinosa”
Claim · model-written summary
Increasing drought stress significantly decreased stomatal conductance, predawn water potential, and leaf relative water content in every ecotype.
- Taxon
- Argania spinosaSideroxylon spinosume2
- Treatment
- increasing degree of drought stresse0
- Outcome
- stomatal conductance (gs), predawn leaf water potential (Ψpd) and leaf relative water contente1
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a significant decrease in these physiological traits with increasing degree of drought stress in all ecotypes”
e1“stomatal conductance (gs), predawn leaf water potential (Ψpd) and leaf relative water content”
e2“Argania spinosa”
Claim · model-written summary
Drought stress significantly increased endogenous H2O2 and lipid peroxidation.
- Taxon
- Argania spinosaSideroxylon spinosume1
- Treatment
- Drought stresse0
- Outcome
- endogenous H2O2 and lipid peroxidatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress significantly increased endogenous H2O2 and lipid peroxidation”
e1“Argania spinosa”
Claim · model-written summary
Moderate and severe drought significantly increased five antioxidant and lipid-associated enzyme activities depending on time.
- Taxon
- Argania spinosaSideroxylon spinosume1
- Treatment
- Moderate and severe drought stresse0
- Outcome
- catalase, superoxide dismutase, peroxidase, polyphenoloxidase and lipoxygenase activitiese0
- Direction
- increasede0
- Qualifier
- depending on timee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moderate and severe drought stress increased significantly the catalase, superoxide dismutase, peroxidase, polyphenoloxidase and lipoxygenase activities, depending on time”
e1“Argania spinosa”
Claim · model-written summary
Constitutive enzyme activities were higher in inland than coastal ecotypes.
- Taxon
- Argania spinosaSideroxylon spinosume2
- Material
- inland ecotypese0
- Outcome
- constitutive activitiese0
- Direction
- highere0
- Comparator
- coastal ecotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Their constitutive activities were higher in inland ecotypes than in coastal ecotypes”
e1“catalase, superoxide dismutase, peroxidase, polyphenoloxidase and lipoxygenase activities”
e2“Argania spinosa”
Claim · model-written summary
Canonical discriminant analysis distinguished inland from coastal ecotypes by Ψpd, gs, polyphenol oxidase, superoxide dismutase and malonyldialdehyde.
- Taxon
- Argania spinosaSideroxylon spinosume1
- Material
- inland ecotypese0
- Outcome
- Ψpd, gs, polyphenol oxidase, superoxide dismutase and malonyldialdehydee0
- Comparator
- coastal ecotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inland ecotypes were essentially distinguished from the coastal ecotypes by the following physiological and biochemical traits: Ψpd, gs, polyphenol oxidase, superoxide dismutase and malonyldialdehyde”
e1“Argania spinosa”
Claim · model-written summary
Inland ecotypes appeared more drought tolerant than coastal ecotypes.
- Taxon
- Argania spinosaSideroxylon spinosume1
- Material
- Inland ecotypese0
- Outcome
- tolerant to drought stresse0
- Direction
- more tolerante0
- Comparator
- coastal ecotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inland ecotypes seem to be more tolerant to drought stress than coastal ecotypes”
e1“Argania spinosa”
The same questions in other papers
drought · physiology: gas exchange · Sideroxylon spinosumResults agree
1 paper in the same direction as this paper
- 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.