Abstract
Osmotic adjustment (lin), stomatal res istance (r ), net photosynthes is s (P N) and three growth parameters (fresh weight-FW; dry weight-DW and length-L) were measured in pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4 . Complete osmotic adjustment was not attained in any of the treatments, and lin decreased with increasing external sal inity, indicating a possible reduction in turgor. FW and L of the plants decreased accordingly. Stomatal resistance in plants grown in NaCl rose with increasing sal inity and in parallel a decrease in DWand in P N was observed. Stomatal resistance generally rose with increasing concentrations of potassium salts, but at a KCl concentration of 'V 100 mosmol rs was lower and PN was double than that of the controls. However, the dry weight of these plants was lower than of plants exposed to K 2 S0 4 . The latter had the highest dry weight of the four treatments which was even higher than that of the controls. At 'V 100 mosmol K2S04 , PN was not affected although rs increased 'V 40% above that of the controls, indicating increased capacity of the photosynthetic mechanism. High levels of potassium seem to benefit photosynthesis in Alaska peas exposed to sal inity. The osmotic component does not appear to be the main factor affecting PW ' The nature of the specific ions appear to be of greater importance, although the mechanism of their effect is as yet unclear.
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Claims 14
Claim · model-written summary
Complete osmotic adjustment was absent under every salt treatment.
- Taxon
- pea plants
Lathyrus oleraceuse1 - Outcome
- Complete osmotic adjustment was not attainede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Complete osmotic adjustment was not attained in any of the treatments”
e1“pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4”
Claim · model-written summary
Osmotic adjustment declined as external salinity increased.
- Taxon
- pea plantsLathyrus oleraceuse1
- Treatment
- external sal initye0
- Outcome
- line0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lin decreased with increasing external sal inity”
e1“pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4”
Claim · model-written summary
Plant fresh weight fell with increasing salinity.
- Taxon
- pea plantsLathyrus oleraceuse1
- Outcome
- FWe0
- Direction
- decreasede0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FW and L of the plants decreased accordingly.”
e1“pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4”
Claim · model-written summary
Plant length fell with increasing salinity.
- Taxon
- pea plantsLathyrus oleraceuse1
- Outcome
- Le0
- Direction
- decreasede0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FW and L of the plants decreased accordingly.”
e1“pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4”
Claim · model-written summary
Stomatal resistance increased as NaCl salinity increased.
- Taxon
- pea plantsLathyrus oleraceuse1
- Treatment
- NaCle0
- Outcome
- Stomatal resistancee0
- Direction
- rosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stomatal resistance in plants grown in NaCl rose with increasing sal inity”
e1“pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4”
Claim · model-written summary
Dry weight declined as NaCl salinity increased.
- Taxon
- pea plantsLathyrus oleraceuse1
- Outcome
- DWe0
- Direction
- decreasee0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a decrease in DWand in P N was observed.”
e1“pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4”
Claim · model-written summary
Net photosynthesis declined as NaCl salinity increased.
- Taxon
- pea plantsLathyrus oleraceuse1
- Outcome
- P Ne0
- Direction
- decreasee0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a decrease in DWand in P N was observed.”
e1“pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4”
Claim · model-written summary
Stomatal resistance generally rose as potassium salt concentration increased.
- Taxon
- pea plantsLathyrus oleraceuse1
- Treatment
- potassium saltse0
- Outcome
- Stomatal resistancee0
- Direction
- rosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stomatal resistance generally rose with increasing concentrations of potassium salts”
e1“pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4”
Claim · model-written summary
At about 100 mosmol KCl, stomatal resistance was below controls.
- Taxon
- pea plantsLathyrus oleraceuse1
- Treatment
- KCl concentration of 'V 100 mosmole0
- Outcome
- rse0
- Direction
- lowere0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at a KCl concentration of 'V 100 mosmol rs was lower and PN was double than that of the controls.”
e1“pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4”
Claim · model-written summary
At about 100 mosmol KCl, net photosynthesis doubled relative to controls.
- Taxon
- pea plantsLathyrus oleraceuse1
- Treatment
- KCl concentration of 'V 100 mosmole0
- Outcome
- PNe0
- Direction
- doublee0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at a KCl concentration of 'V 100 mosmol rs was lower and PN was double than that of the controls.”
e1“pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4”
Claim · model-written summary
KCl-treated plants had lower dry weight than K2SO4-treated plants.
- Taxon
- pea plantsLathyrus oleraceuse1
- Outcome
- dry weighte0
- Direction
- lowere0
- Comparator
- plants exposed to K 2 S0 4e0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the dry weight of these plants was lower than of plants exposed to K 2 S0 4 .”
e1“pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4”
Claim · model-written summary
K2SO4 produced the highest dry weight of the four treatments, exceeding controls.
- Taxon
- pea plantsLathyrus oleraceuse1
- Outcome
- dry weighte0
- Direction
- higheste0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The latter had the highest dry weight of the four treatments which was even higher than that of the controls.”
e1“pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4”
Claim · model-written summary
At about 100 mosmol K2SO4, photosynthesis was unaffected.
- Taxon
- pea plantsLathyrus oleraceuse1
- Treatment
- 'V 100 mosmol K2S04e0
- Outcome
- PNe0
- Direction
- not affectede0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 'V 100 mosmol K2S04 , PN was not affected although rs increased 'V 40% above that of the controls”
e1“pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4”
Claim · model-written summary
At about 100 mosmol K2SO4, stomatal resistance rose about 40% over controls.
- Taxon
- pea plantsLathyrus oleraceuse1
- Treatment
- 'V 100 mosmol K2S04e0
- Outcome
- rse0
- Direction
- increasede0
- Value
- 'V 40%e0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 'V 100 mosmol K2S04 , PN was not affected although rs increased 'V 40% above that of the controls”
e1“pea plants grown in different concentrations (85-390 mosmol) of either NaCl, KC1, Na 2 S0 4 or K 2 S0 4”