Abstract
Our study was undertaken to ascertain whether the change of the water status and the activation of superoxide dismutase and their isoenzymes in Argan tree can support edaphic drought tolerance and its recovery under rehydration. An experiment was conducted on four contrasting ecotypes of Argania spinosa plants: two contrasting coastal ecotypes (Admine (Adm) and Rabia (Rab)) and two contrasting inland ecotypes (Aoulouz (Alz) and Lakhssas (Lks)). Drought stress significantly decreased the leaf water potential and stomatal conductance in the four contrasted ecotypes. In terms of biochemical responses, significant accumulation of carbonyl groups, hydrogen peroxide and superoxide radical has been recorded in the leaves of stressed plants reflecting oxidative stress. In parallel, the activities of total superoxide dismutase (SOD) and their isoenzymes Cu/Zn-SOD, Cu/Zn-SOD and Fe-SOD were also found to have increased to scavenging ROS and protecting the cell against induced oxidative stress. The recovery kinetics of A. spinosa, as a response to rehydration, were significant and rapid. According to the traits having the most discriminating power, both inland ecotypes (Lks and Alz) showed a better upregulation of its protective mechanisms compared to coastal ecotypes (Rab and Adm). All these adaptive traits make the inland ecotypes as an elite resource of drought tolerance and might become the new focus of domestication research of argan tree in arid and semi-arid environments.
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Claims 8
Claim · model-written summary
Drought significantly reduced leaf water potential in all four argan ecotypes.
- Taxon
- Argania spinosa
Sideroxylon spinosumt0 - Treatment
- Drought stresse0
- Outcome
- leaf water potentiale0
- Direction
- decreasede0
- Qualifier
- four contrasted ecotypese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress significantly decreased the leaf water potential and stomatal conductance in the four contrasted ecotypes.”
t0“Argania spinosa”
Claim · model-written summary
Drought significantly reduced stomatal conductance in all four argan ecotypes.
- Taxon
- Argania spinosaSideroxylon spinosumt0
- Treatment
- Drought stresse0
- Outcome
- stomatal conductancee0
- Direction
- decreasede0
- Qualifier
- four contrasted ecotypese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress significantly decreased the leaf water potential and stomatal conductance in the four contrasted ecotypes.”
t0“Argania spinosa”
Claim · model-written summary
Stressed argan leaves accumulated carbonyl groups, hydrogen peroxide and superoxide radical significantly.
- Taxon
- Argania spinosaSideroxylon spinosumt0
- Organ / stage
- leavese0
- Treatment
- stressed plantse0
- Outcome
- accumulation of carbonyl groups, hydrogen peroxide and superoxide radicale0
- Direction
- accumulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant accumulation of carbonyl groups, hydrogen peroxide and superoxide radical has been recorded in the leaves of stressed plants”
t0“Argania spinosa”
Claim · model-written summary
Total superoxide dismutase activity rose in stressed argan plants.
- Taxon
- Argania spinosaSideroxylon spinosumt0
- Gene
- total superoxide dismutase (SOD)e0
- Outcome
- activities of total superoxide dismutase (SOD)e0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activities of total superoxide dismutase (SOD) and their isoenzymes Cu/Zn-SOD, Cu/Zn-SOD and Fe-SOD were also found to have increased”
t0“Argania spinosa”
Claim · model-written summary
Cu/Zn-SOD and Fe-SOD isoenzyme activities rose in stressed argan plants.
- Taxon
- Argania spinosaSideroxylon spinosumt0
- Gene
- Cu/Zn-SOD, Cu/Zn-SOD and Fe-SODe0
- Outcome
- activities of total superoxide dismutase (SOD) and their isoenzymes Cu/Zn-SOD, Cu/Zn-SOD and Fe-SODe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activities of total superoxide dismutase (SOD) and their isoenzymes Cu/Zn-SOD, Cu/Zn-SOD and Fe-SOD were also found to have increased”
t0“Argania spinosa”
Claim · model-written summary
Argan recovery after rehydration was significant and rapid.
- Taxon
- A. spinosaSideroxylon spinosume0
- Treatment
- rehydratione0
- Outcome
- recovery kineticse0
- Direction
- rapide0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The recovery kinetics of A. spinosa, as a response to rehydration, were significant and rapid.”
Claim · model-written summary
Inland argan ecotypes showed better upregulation of protective mechanisms than coastal ecotypes.
- Taxon
- Argania spinosaSideroxylon spinosumt0
- Material
- inland ecotypes (Lks and Alz)e0
- Outcome
- upregulation of its protective mechanismse0
- Direction
- bettere0
- Comparator
- coastal ecotypes (Rab and Adm)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both inland ecotypes (Lks and Alz) showed a better upregulation of its protective mechanisms compared to coastal ecotypes (Rab and Adm)”
t0“Argania spinosa”
Claim · model-written summary
The authors consider the inland argan ecotypes promising drought-tolerant domestication material.
Verbatim
e0“All these adaptive traits make the inland ecotypes as an elite resource of drought tolerance and might become the new focus of domestication research of argan tree in arid and semi-arid environments.”
The same questions in other papers
drought · physiology: water · Sideroxylon spinosumResults agree
1 paper in the same direction as this paper
- no effect
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.