Abstract
With the purpose of assessing the physiological responses of J. curcas young plants to drought and flooding, plants were subjected to three watering regimes: Control, drought and flooding. In the same period, five plants were submitted to drought (irrigation suspension), five to flooding and five were maintained near the field capacity (control). Measurements of leaf gas exchange, chlorophyll content, biomass of each organ (leaf, stem and root), biomass ratios, as well as the root:shoot ratio were made. When compared to control, drought and flooding treatments led to significant reductions (P.05) of gas exchange rates at 14 and 7 days after imposition treatments (DAIT), respectively. At the 16 th DAIT, significant reductions of leaf, root, stem and total biomass were observed, which resulted in changes of biomass partitioning of each organ. Significant reduction of leaf dry biomass (LDB) was observed in water deficit plants. Moreover, no significant effects of water deficit were observed in root dry biomass. Such response has led to a higher root:shoot ratio, suggesting an improved ability for water and nutrients uptake. In turn, flooding has induced a significant decrease in the dry biomass of all organs. Stem dry biomass ratio of flooded plants (0.67 g g -1 ) was significantly higher than that of control plants (0.41 g g -1 ), which, was seemingly due to leaf senescence and root system rotting of flooded plants. Altogether, present results reinforce the susceptibility of the studied genotype of J. curcas to flooding, as well as highlight some characteristics of drought tolerance in this species.
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Claims 7
Claim · model-written summary
Drought significantly reduced gas exchange at 14 days compared with control.
- Taxon
- Jatropha curcas L.
_tree_at_Samedha.jpg?width=60)
Jatropha curcast0 - Treatment
- droughte0
- Outcome
- gas exchange ratese0
- Direction
- reductionse0
- Qualifier
- 14e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_tree_at_Samedha.jpg?width=500)
Verbatim
e0“When compared to control, drought and flooding treatments led to significant reductions (P.05) of gas exchange rates at 14 and 7 days after imposition treatments (DAIT), respectively”
t0“Jatropha curcas L.”
Claim · model-written summary
Flooding significantly reduced gas exchange at seven days compared with control.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- floodinge0
- Outcome
- gas exchange ratese0
- Direction
- reductionse0
- Qualifier
- 7 dayse0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When compared to control, drought and flooding treatments led to significant reductions (P.05) of gas exchange rates at 14 and 7 days after imposition treatments (DAIT), respectively”
t0“Jatropha curcas L.”
Claim · model-written summary
Water deficit significantly reduced leaf dry biomass.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- water deficite0
- Outcome
- leaf dry biomasse0
- Direction
- reductione0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant reduction of leaf dry biomass (LDB) was observed in water deficit plants”
e1“five were maintained near the field capacity (control)”
t0“Jatropha curcas L.”
Claim · model-written summary
Water deficit had no significant effect on root dry biomass.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- water deficite0
- Outcome
- root dry biomasse0
- Direction
- no significant effectse0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant effects of water deficit were observed in root dry biomass”
e1“five were maintained near the field capacity (control)”
t0“Jatropha curcas L.”
Claim · model-written summary
Water deficit raised the root to shoot ratio.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- water deficite1
- Outcome
- root:shoot ratioe0
- Direction
- highere0
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Such response has led to a higher root:shoot ratio”
e1“no significant effects of water deficit were observed in root dry biomass”
e2“five were maintained near the field capacity (control)”
t0“Jatropha curcas L.”
Claim · model-written summary
Flooding significantly decreased dry biomass in all organs.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- floodinge0
- Outcome
- dry biomass of all organse0
- Direction
- decreasee0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“flooding has induced a significant decrease in the dry biomass of all organs”
e1“five were maintained near the field capacity (control)”
t0“Jatropha curcas L.”
Claim · model-written summary
Flooded plants had a significantly higher stem dry biomass ratio of 0.67 g g -1 than controls at 0.41 g g -1.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- floodede0
- Outcome
- Stem dry biomass ratioe0
- Direction
- highere0
- Value
- 0.67 g g -1e0
- Qualifier
- 0.41 g g -1e0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stem dry biomass ratio of flooded plants (0.67 g g -1 ) was significantly higher than that of control plants (0.41 g g -1 )”
t0“Jatropha curcas L.”
The same questions in other papers
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1 paper in the same direction as this paper
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flooding · physiology: gas exchange · Jatropha curcasResults 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.