Abstract
Under NaCl stress conditions, the relationship between delayed fluorescence (DF) and net photosynthesis rate (Pn) in detached leaves of spinach (Spinacia oleracea L.) was surveyed. Results showed that the changes in DF intensity of the spinach leaves directly exposed to different NaCl concentrations demonstrated considerably high consistency with that in Pn. Incubation of the leaves in 200mmol/L NaCl induced a gradual increase and subsequent decline of the DF intensity and Pu, whereas incubation of the leaves in 300mmol/L NaCl induced a continuous decline of the DF intensity and Pn, suggesting that DF bad the same response to duration of treatment of different NaC1 concentrations with Pn. Both DF and Pn showed maximal Ca2+ antagonism effects on stress of high concentration NaC1 when the concentration of CaC12 reached l5mmolfL. All the results demonstrated that DF has an excellent correlation with Pn and can be used as a sensitive test for the state of photosynthetic apparatus under salt stress physiology.
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Claims 7
Claim · model-written summary
Delayed fluorescence changes tracked net photosynthesis changes across NaCl treatments.
- Taxon
- spinach
Spinacia oleraceae0 - Treatment
- different NaCl concentrationse0
- Outcome
- changes in DF intensitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“changes in DF intensity of the spinach leaves directly exposed to different NaCl concentrations demonstrated considerably high consistency with that in Pn”
Claim · model-written summary
At 200mmol/L NaCl delayed fluorescence first rose and then fell.
- Taxon
- spinachSpinacia oleraceat0
- Treatment
- 200mmol/L NaCle0
- Outcome
- DF intensitye0
- Direction
- gradual increase and subsequent declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Incubation of the leaves in 200mmol/L NaCl induced a gradual increase and subsequent decline of the DF intensity and Pu”
t0“spinach”
Claim · model-written summary
At 200mmol/L NaCl photosynthesis first rose and then fell.
- Taxon
- spinachSpinacia oleraceat0
- Treatment
- 200mmol/L NaCle0
- Outcome
- Pue0
- Direction
- gradual increase and subsequent declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Incubation of the leaves in 200mmol/L NaCl induced a gradual increase and subsequent decline of the DF intensity and Pu”
t0“spinach”
Claim · model-written summary
At 300mmol/L NaCl delayed fluorescence declined continuously.
- Taxon
- spinachSpinacia oleraceat0
- Treatment
- 300mmol/L NaCle0
- Outcome
- DF intensitye0
- Direction
- continuous declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“incubation of the leaves in 300mmol/L NaCl induced a continuous decline of the DF intensity and Pn”
t0“spinach”
Claim · model-written summary
At 300mmol/L NaCl photosynthesis declined continuously.
- Taxon
- spinachSpinacia oleraceat0
- Treatment
- 300mmol/L NaCle0
- Outcome
- Pne0
- Direction
- continuous declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“incubation of the leaves in 300mmol/L NaCl induced a continuous decline of the DF intensity and Pn”
t0“spinach”
Claim · model-written summary
Calcium antagonism against high NaCl stress was greatest at l5mmolfL for fluorescence and photosynthesis.
- Taxon
- spinachSpinacia oleraceat0
- Treatment
- CaC12e0
- Outcome
- Ca2+ antagonism effectse0
- Direction
- maximale0
- Value
- l5mmolfLe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both DF and Pn showed maximal Ca2+ antagonism effects on stress of high concentration NaC1 when the concentration of CaC12 reached l5mmolfL”
t0“spinach”
Claim · model-written summary
The authors propose delayed fluorescence as a sensitive test of photosynthetic apparatus status under salt stress.
- Taxon
- spinachSpinacia oleraceat0
- Outcome
- sensitive test for the state of photosynthetic apparatuse0
- Comparator
- Pne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DF has an excellent correlation with Pn and can be used as a sensitive test for the state of photosynthetic apparatus under salt stress physiology”
t0“spinach”
The same questions in other papers
sodium chloride · physiology: photosynthesis · Spinacia oleracea (spinach)Results 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.