Abstract
Vicia faba cv. Maris Bead was grown either on fixed nitrogen or on ammonium nitrate. After 4 weeks growth, nutrient solutions were supplemented with 50, 75 and 100 mol m−3 NaCl for 15 d. Five harvests were made at weekly intervals, beginning at 4 weeks. Effects of salinity were directly related to dose, plant growth (fresh and dry weight) being depressed in both N-fixing and N-fertilized plants. The number of nodules per plant and the proportion of those formed which developed into the active nitrogen fixing state were depressed by salt stress. Increased size of nodules in salt-stressed plants only partly compensated for the lower specific nitrogenase activity. The effects of salinity on plant nitrogen content were more pronounced on N-flxing than on N-fertilized plants. The former took up more Na+ and Cl− than the latter: the implications of this and of ionic imbalance are discussed.
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Claims 6
Claim · model-written summary
Salinity depressed fresh and dry weight in both nitrogen fixing and nitrogen fertilized Vicia faba, in a dose related manner.
- Taxon
- Vicia faba
Vicia fabat0 - Treatment
- salinitye0
- Outcome
- fresh and dry weighte0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vicia faba”
e0“Effects of salinity were directly related to dose, plant growth (fresh and dry weight) being depressed in both N-fixing and N-fertilized plants”
Claim · model-written summary
Salt stress depressed nodule number and the proportion reaching active nitrogen fixation.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- salt stresse0
- Outcome
- number of nodules per plant and the proportion of those formed which developed into the active nitrogen fixing statee0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vicia faba”
e0“The number of nodules per plant and the proportion of those formed which developed into the active nitrogen fixing state were depressed by salt stress”
Claim · model-written summary
Salt stressed plants had larger nodules, partly compensating for lower specific nitrogenase activity.
- Taxon
- Vicia fabaVicia fabat0
- Outcome
- size of nodulese0
- Direction
- Increasede0
- Qualifier
- lower specific nitrogenase activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vicia faba”
e0“Increased size of nodules in salt-stressed plants only partly compensated for the lower specific nitrogenase activity”
Claim · model-written summary
Specific nitrogenase activity was lower in salt stressed plants.
- Taxon
- Vicia fabaVicia fabat0
- Outcome
- specific nitrogenase activitye0
- Direction
- lowere0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vicia faba”
e0“lower specific nitrogenase activity”
Claim · model-written summary
Salinity affected plant nitrogen content more strongly in nitrogen fixing than nitrogen fertilized plants.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- salinitye0
- Outcome
- plant nitrogen contente0
- Direction
- more pronouncede0
- Comparator
- N-fertilized plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vicia faba”
e0“The effects of salinity on plant nitrogen content were more pronounced on N-flxing than on N-fertilized plants”
Claim · model-written summary
Nitrogen fixing plants took up more Na+ and Cl− than nitrogen fertilized plants.
- Taxon
- Vicia fabaVicia fabat0
- Outcome
- Na+ and Cl−e0
- Direction
- moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vicia faba”
e0“The former took up more Na+ and Cl− than the latter”
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