Abstract
To investigate how the regulation of plant water status contributes to salt tolerance in celery ( Apium graveolens L. cv. Istar) we determined growth, leaf gas exchange and water relations in hydroponically‐grown plants supplied with nutrient solutions containing 5 (control), 50, 100 and 300 m M NaCl for 4 weeks, and supplied subsequently with the control solution to relieve salt stress. At salinity levels of 50 and 100 m M NaCl there was a moderate, albeit significant, reduction in biomass production. A drastic decrease in both dry weight and leaf area occurred at 300 m M NaCl, but the plants remained viable and showed appreciable photosynthesis and growth. Leaf water potential, turgor pressure, stomatal conductance and plant hydraulic conductance (L p ) decreased during salt exposure. After the first week of stress there was a progressive increase in leaf turgor and L p , which was associated with substantial recovery of stomatal conductance and photosynthesis in 50 and 100 m M NaCl‐treated plants. The analysis of the pressure‐volume isotherms showed that osmotic adjustment had occurred under all NaCl treatments. Leaf osmotic adjustment in salt‐stressed plants was primarily accomplished by accumulation of Na + and Cl − . Upon relief of stress, salinized plants rehydrated and regained turgor rapidly, and growth and photosynthesis resumed almost fully. These results indicate that maintenance of a favourable water status contributes substantially to the salt resistance of celery.
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Claims 11
Claim · model-written summary
50 and 100 m M NaCl significantly reduced celery biomass production.
- Taxon
- Apium graveolens
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Apium graveolenst0 - Treatment
- 50 and 100 m M NaCle0
- Outcome
- biomass productione0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
%2C_Elswick%2C_Northumberland_4.jpg?width=500)
Verbatim
e0“At salinity levels of 50 and 100 m M NaCl there was a moderate, albeit significant, reduction in biomass production”
t0“Apium graveolens during long‐term NaCl stress and subsequent relief”
Claim · model-written summary
300 m M NaCl drastically decreased celery dry weight and leaf area.
- Taxon
- Apium graveolensApium graveolenst0
- Treatment
- 300 m M NaCle0
- Outcome
- dry weight and leaf areae0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A drastic decrease in both dry weight and leaf area occurred at 300 m M NaCl”
t0“Apium graveolens during long‐term NaCl stress and subsequent relief”
Claim · model-written summary
Celery remained viable and photosynthetically active at 300 m M NaCl.
- Taxon
- Apium graveolensApium graveolenst0
- Outcome
- remained viable and showed appreciable photosynthesis and growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but the plants remained viable and showed appreciable photosynthesis and growth”
t0“Apium graveolens during long‐term NaCl stress and subsequent relief”
Claim · model-written summary
Leaf water potential, turgor, stomatal conductance, and hydraulic conductance decreased during salt exposure.
- Taxon
- Apium graveolensApium graveolenst0
- Treatment
- salt exposuree0
- Outcome
- Leaf water potential, turgor pressure, stomatal conductance and plant hydraulic conductance (L p )e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf water potential, turgor pressure, stomatal conductance and plant hydraulic conductance (L p ) decreased during salt exposure”
t0“Apium graveolens during long‐term NaCl stress and subsequent relief”
Claim · model-written summary
Leaf turgor and hydraulic conductance increased progressively after one week of stress.
- Taxon
- Apium graveolensApium graveolenst0
- Outcome
- leaf turgor and L pe0
- Direction
- increasee0
- Qualifier
- After the first week of stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After the first week of stress there was a progressive increase in leaf turgor and L p”
t0“Apium graveolens during long‐term NaCl stress and subsequent relief”
Claim · model-written summary
Stomatal conductance and photosynthesis substantially recovered at 50 and 100 m M NaCl.
- Taxon
- Apium graveolensApium graveolenst0
- Treatment
- 50 and 100 m M NaCle0
- Outcome
- stomatal conductance and photosynthesise0
- Direction
- recoverye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“substantial recovery of stomatal conductance and photosynthesis in 50 and 100 m M NaCl‐treated plants”
t0“Apium graveolens during long‐term NaCl stress and subsequent relief”
Claim · model-written summary
Osmotic adjustment occurred under all NaCl treatments.
- Taxon
- Apium graveolensApium graveolenst0
- Treatment
- all NaCl treatmentse0
- Outcome
- osmotic adjustment had occurrede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“osmotic adjustment had occurred under all NaCl treatments”
t0“Apium graveolens during long‐term NaCl stress and subsequent relief”
Claim · model-written summary
Leaf osmotic adjustment was primarily achieved by Na + and Cl − accumulation.
- Taxon
- Apium graveolensApium graveolenst0
- Compound
- Na + and Cl −e0
- Outcome
- Leaf osmotic adjustmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf osmotic adjustment in salt‐stressed plants was primarily accomplished by accumulation of Na + and Cl −”
t0“Apium graveolens during long‐term NaCl stress and subsequent relief”
Claim · model-written summary
After stress relief, celery plants rapidly rehydrated and regained turgor.
- Taxon
- Apium graveolensApium graveolenst0
- Outcome
- rehydrated and regained turgore0
- Direction
- rapidlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Upon relief of stress, salinized plants rehydrated and regained turgor rapidly”
t0“Apium graveolens during long‐term NaCl stress and subsequent relief”
Claim · model-written summary
After stress relief, celery growth and photosynthesis resumed almost fully.
- Taxon
- Apium graveolensApium graveolenst0
- Outcome
- growth and photosynthesise0
- Direction
- resumede0
- Qualifier
- almost fullye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and photosynthesis resumed almost fully”
t0“Apium graveolens during long‐term NaCl stress and subsequent relief”
Claim · model-written summary
Favorable water status contributes substantially to celery salt resistance.
- Taxon
- celeryApium graveolens Dulce Groupe0
- Outcome
- salt resistancee0
- Qualifier
- maintenance of a favourable water statuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maintenance of a favourable water status contributes substantially to the salt resistance of celery”
The same questions in other papers
sodium chloride · growth · Apium graveolensResults differ
6 papers in the same direction as this paper · 4 in the opposite direction
- negative
- positive
- positive
7 papers more in this group
See all 11 papers →sodium chloride · yield · Apium graveolensPositive and negative results
1 in the opposite direction
- positive
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.