Abstract
In order to evaluate the effects of salt stress on growth and photosynthetic physiology in Jatropha curcas L.The growth,content of photosynthetic pigments,photosynthetic parameters as net photosynthetic rate(Pn),etc.,malondialdehyde(MDA)and electrolyte leakage(EL)of Jatropha curcas L.treated with different concentrations of NaCl in greenhouse were investigated.The results obtained are as follows:①Compared with the control,the growth and biomasse of Jatropha curcas L.were enhanced with 25-50 mmol·L-1 NaCl treatment,especially with 50 mmol·L-1 NaCl.The fresh weight increased 44.3% than the control.The growth and the biomasses had no significant changes with 100 and 150 mmol·L-1 NaCl treatment,but were inhibited with 200-250 mmol·L-1 NaCl treatment.For example,the fresh weight under the 200 and 250 mmol·L-1 NaCl stresses decreased significantly 39.3% and 70.2% respestively.②Compared with control,net photosynthetic rate increased significantly 17.2% under 50mmol·L-1 NaCl treatment,while had no significant changes under 100 and 150 mmol·L-1 NaCl treatment.Under 200 and 250 mmol·L-1 NaCl treatment,it decreased significantly 73.2% and 77.9% respestively.Under the different concentrations salt stresses,the stomatal conductance and transpiration rate showed the similar trends of net photosynthetic rate,but the MDA and EL showed the contrary ③The chlorophyll contens increased progressively with 25 and 50 mmol·L-1 NaCl treatment,then decreased with 100-250 mmol·L-1 NaCl treatment,but had no significant effect on the chlorophyll a/b ratio.The carotinoid contents increased significantly with 25 mmol·L-1 NaCl treatment,then decrease with 50-250 mmol·L-1 NaCl treatment,but the Car/Chl ratio increased gradually with the increasing salt concentrations.④The WUE had no significant changes with 25-150 mmol·L-1 NaCl treatment,but decreased significantly 33.5% and 22.6% respestively with 200 and 250 mmol L-1 NaCl treatment.We conclude that Jatropha curcas L.seedlings had a higer Pn than the control by increasing stomatal conductance,stability and activity of photosynthetic membrane and other cell membranes with 25 and 50 mmol·L-1 NaCl treatment,thus promoting the growth and biomasses,and salt-tolerance can be further increased.Pn had no significant decrease with 100 and 150 mmol·L-1 NaCl treatment because of steady WUE,while the growth and other metabolisms of seedlings were little affected.Pn decreased significantly with 200 and 250 mmol·L-1 NaCl treatment due to the weakening of stability and activity of cell membrane,the seedlings raised salt-tolerance by incraesing the activities of antioxidant systems and reducing the growth.Jatropha curcas L.has a good adaptative response to salt stress,it can grow well below 150 mmol L-1 NaCl treatment.
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Claims 18
Claim · model-written summary
Low NaCl increased growth and biomass.
- Taxon
- Jatropha curcas L.
_tree_at_Samedha.jpg?width=60)
Jatropha curcase0 - Treatment
- 25-50 mmol·L-1 NaCl treatmente0
- Outcome
- growth and biomassee0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_tree_at_Samedha.jpg?width=500)
Verbatim
e0“the growth and biomasse of Jatropha curcas L.were enhanced with 25-50 mmol·L-1 NaCl treatment”
Claim · model-written summary
At 50 mmol·L-1 NaCl fresh weight rose 44.3%.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 50 mmol·L-1 NaCle0
- Outcome
- fresh weighte0
- Direction
- increasede0
- Value
- 44.3%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“especially with 50 mmol·L-1 NaCl.The fresh weight increased 44.3% than the control”
Claim · model-written summary
Growth and biomass did not change significantly at intermediate NaCl.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 100 and 150 mmol·L-1 NaCl treatmente0
- Outcome
- growth and the biomassese0
- Direction
- no significant changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“The growth and the biomasses had no significant changes with 100 and 150 mmol·L-1 NaCl treatment”
Claim · model-written summary
At 200 mmol·L-1 NaCl fresh weight declined 39.3%.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 200 and 250 mmol·L-1 NaCl stressese0
- Outcome
- fresh weighte0
- Direction
- decreasede0
- Value
- 39.3%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“fresh weight under the 200 and 250 mmol·L-1 NaCl stresses decreased significantly 39.3% and 70.2% respestively”
Claim · model-written summary
At 250 mmol·L-1 NaCl fresh weight declined 70.2%.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 250 mmol·L-1 NaCle0
- Outcome
- fresh weighte0
- Direction
- decreasede0
- Value
- 70.2%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“fresh weight under the 200 and 250 mmol·L-1 NaCl stresses decreased significantly 39.3% and 70.2% respestively”
Claim · model-written summary
Net photosynthetic rate increased 17.2% under 50 mmol·L-1 NaCl.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 50mmol·L-1 NaCl treatmente0
- Outcome
- net photosynthetic ratee0
- Direction
- increasede0
- Value
- 17.2%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“net photosynthetic rate increased significantly 17.2% under 50mmol·L-1 NaCl treatment”
Claim · model-written summary
Net photosynthetic rate had no significant change at intermediate NaCl.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 100 and 150 mmol·L-1 NaCl treatmente0
- Outcome
- no significant changese0
- Direction
- no significant changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“had no significant changes under 100 and 150 mmol·L-1 NaCl treatment”
Claim · model-written summary
Net photosynthetic rate fell 73.2% at 200 mmol·L-1 NaCl.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 200 and 250 mmol·L-1 NaCl treatmente0
- Outcome
- ite0
- Direction
- decreasede0
- Value
- 73.2%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“Under 200 and 250 mmol·L-1 NaCl treatment,it decreased significantly 73.2% and 77.9% respestively”
Claim · model-written summary
Net photosynthetic rate fell 77.9% at 250 mmol·L-1 NaCl.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 250 mmol·L-1 NaCle0
- Outcome
- ite0
- Direction
- decreasede0
- Value
- 77.9%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“Under 200 and 250 mmol·L-1 NaCl treatment,it decreased significantly 73.2% and 77.9% respestively”
Claim · model-written summary
Stomatal conductance and transpiration tracked photosynthetic rate; MDA and leakage varied oppositely.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Outcome
- stomatal conductance and transpiration ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“the stomatal conductance and transpiration rate showed the similar trends of net photosynthetic rate,but the MDA and EL showed the contrary”
Claim · model-written summary
Chlorophyll rose at low salt and declined at higher salt.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 25 and 50 mmol·L-1 NaCl treatmente0
- Outcome
- chlorophyll contense0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“The chlorophyll contens increased progressively with 25 and 50 mmol·L-1 NaCl treatment,then decreased with 100-250 mmol·L-1 NaCl treatment”
Claim · model-written summary
Chlorophyll a/b ratio was not significantly affected.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Outcome
- chlorophyll a/b ratioe0
- Direction
- no significant effecte0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“had no significant effect on the chlorophyll a/b ratio”
Claim · model-written summary
Carotenoids rose at 25 mmol·L-1 NaCl.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 25 mmol·L-1 NaCl treatmente0
- Outcome
- carotinoid contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“The carotinoid contents increased significantly with 25 mmol·L-1 NaCl treatment”
Claim · model-written summary
Carotenoids declined at 50-250 mmol·L-1 NaCl.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 50-250 mmol·L-1 NaCl treatmente0
- Outcome
- decreasee0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“then decrease with 50-250 mmol·L-1 NaCl treatment”
Claim · model-written summary
Carotenoid to chlorophyll ratio rose with salt concentration.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- increasing salt concentrationse0
- Outcome
- Car/Chl ratioe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“the Car/Chl ratio increased gradually with the increasing salt concentrations”
Claim · model-written summary
WUE was unchanged nonsignificantly at 25-150 mmol·L-1 NaCl.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 25-150 mmol·L-1 NaCl treatmente0
- Outcome
- WUEe0
- Direction
- no significant changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“The WUE had no significant changes with 25-150 mmol·L-1 NaCl treatment”
Claim · model-written summary
WUE fell 33.5% at 200 mmol·L-1 NaCl.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 200 and 250 mmol L-1 NaCl treatmente0
- Outcome
- decreasede0
- Direction
- decreasede0
- Value
- 33.5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“decreased significantly 33.5% and 22.6% respestively with 200 and 250 mmol L-1 NaCl treatment”
Claim · model-written summary
WUE fell 22.6% at 250 mmol L-1 NaCl.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 250 mmol L-1 NaCl treatmente0
- Outcome
- decreasede0
- Direction
- decreasede0
- Value
- 22.6%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Jatropha curcas L.”
e0“decreased significantly 33.5% and 22.6% respestively with 200 and 250 mmol L-1 NaCl treatment”
The same questions in other papers
sodium chloride · growth · Jatropha curcasResults differ
1 paper in the same direction as this paper · 7 in the opposite direction
- negative
- negative
- negative
5 papers more in this group
See all 9 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.