Abstract
Physiological effects of drought were studied in two pea ( Pisum sativum L.) cultivars to determine their relative ability to withstand this stress. Drought stress decreased dry weight and relative turgidity, reducing sugar, sucrose and starch concentrations, ribulose‐l,5‐ diphosphate carboxylase (E.CA.l.l.39) activity, and net photosynthesis in both drought‐susceptible ‘Alaska’ and drought‐resistant ‘Hardy’ peas. Decreases in dry weight, carbohydrate concentration, enzyme activity, and net photosynthesis were greater in the drought.susceptible cultlvar, but respiration rate, determined by infrared analysis, was decreased more in the tolerant cultivar. SADH (succinic acid‐2,2‐dimethylhydrazide) treatment increased relative turgidity and ribulose‐l,5‐diphosphate carboxylase activity under drought stress, but decreased respiration and rate of water uptake in both cultivars under nonstress conditions. Sucrose concentration increased in Alaska peas whereas net photosynthesis decreased in Hardy peas after SADH treatment. SADH had no effect on reducing sugar and starch concentrations. It was concluded that SADH treatment probably enabled plants to tolerate stress longer by decreasing energy requirements and metabolic degradation rates.
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Claims 12
Claim · model-written summary
Drought stress decreased dry weight and relative turgidity in two pea cultivars.
- Taxon
- Pisum sativum
Lathyrus oleraceuse0 - Treatment
- Drought stresse1
- Outcome
- dry weight and relative turgiditye1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological effects of drought were studied in two pea ( Pisum sativum L.) cultivars”
e1“Drought stress decreased dry weight and relative turgidity, reducing sugar, sucrose and starch concentrations”
Claim · model-written summary
Drought stress decreased reducing sugar, sucrose and starch concentrations in pea.
- Taxon
- Pisum sativumLathyrus oleraceuse0
- Treatment
- Drought stresse1
- Outcome
- reducing sugar, sucrose and starch concentrationse1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological effects of drought were studied in two pea ( Pisum sativum L.) cultivars”
e1“Drought stress decreased dry weight and relative turgidity, reducing sugar, sucrose and starch concentrations”
Claim · model-written summary
Drought stress decreased ribulose-1,5-bisphosphate carboxylase activity in pea.
- Taxon
- Pisum sativumLathyrus oleraceuse0
- Treatment
- Drought stresse1
- Outcome
- ribulose‐l,5‐ diphosphate carboxylase (E.CA.l.l.39) activitye2
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological effects of drought were studied in two pea ( Pisum sativum L.) cultivars”
e1“Drought stress decreased dry weight and relative turgidity, reducing sugar, sucrose and starch concentrations”
e2“ribulose‐l,5‐ diphosphate carboxylase (E.CA.l.l.39) activity, and net photosynthesis in both drought‐susceptible ‘Alaska’ and drought‐resistant ‘Hardy’ peas”
Claim · model-written summary
Drought stress decreased net photosynthesis in pea.
- Taxon
- Pisum sativumLathyrus oleraceuse0
- Treatment
- Drought stresse1
- Outcome
- net photosynthesise2
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological effects of drought were studied in two pea ( Pisum sativum L.) cultivars”
e1“Drought stress decreased dry weight and relative turgidity, reducing sugar, sucrose and starch concentrations”
e2“ribulose‐l,5‐ diphosphate carboxylase (E.CA.l.l.39) activity, and net photosynthesis in both drought‐susceptible ‘Alaska’ and drought‐resistant ‘Hardy’ peas”
Claim · model-written summary
Under drought, the decreases in dry weight, carbohydrate concentration and enzyme activity were greater in the drought-susceptible pea cultivar.
- Taxon
- Pisum sativumLathyrus oleraceuse0
- Material
- drought.susceptible cultlvare3
- Outcome
- dry weight, carbohydrate concentration, enzyme activitye3
- Direction
- greatere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological effects of drought were studied in two pea ( Pisum sativum L.) cultivars”
e3“Decreases in dry weight, carbohydrate concentration, enzyme activity, and net photosynthesis were greater in the drought.susceptible cultlvar”
Claim · model-written summary
Under drought, the decrease in net photosynthesis was greater in the drought-susceptible pea cultivar.
- Taxon
- Pisum sativumLathyrus oleraceuse0
- Material
- drought.susceptible cultlvare3
- Outcome
- net photosynthesise3
- Direction
- greatere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological effects of drought were studied in two pea ( Pisum sativum L.) cultivars”
e3“Decreases in dry weight, carbohydrate concentration, enzyme activity, and net photosynthesis were greater in the drought.susceptible cultlvar”
Claim · model-written summary
SADH treatment increased relative turgidity and ribulose-1,5-bisphosphate carboxylase activity under drought stress in pea.
- Taxon
- Pisum sativumLathyrus oleraceuse0
- Treatment
- SADHe4
- Outcome
- relative turgidity and ribulose‐l,5‐ diphosphate carboxylase activitye4
- Direction
- increasede4
- Qualifier
- under drought stresse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological effects of drought were studied in two pea ( Pisum sativum L.) cultivars”
e4“SADH (succinic acid‐2,2‐dimethylhydrazide) treatment increased relative turgidity and ribulose‐l,5‐ diphosphate carboxylase activity under drought stress”
Claim · model-written summary
SADH treatment decreased respiration and rate of water uptake in both pea cultivars under nonstress conditions.
- Taxon
- Pisum sativumLathyrus oleraceuse0
- Treatment
- SADHe4
- Outcome
- respiration and rate of water uptakee5
- Direction
- decreasede5
- Qualifier
- under nonstress conditionse5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological effects of drought were studied in two pea ( Pisum sativum L.) cultivars”
e4“SADH (succinic acid‐2,2‐dimethylhydrazide) treatment increased relative turgidity and ribulose‐l,5‐ diphosphate carboxylase activity under drought stress”
e5“but decreased respiration and rate of water uptake in both cultivars under nonstress conditions”
Claim · model-written summary
SADH treatment increased sucrose concentration in the Alaska pea cultivar.
- Taxon
- Pisum sativumLathyrus oleraceuse0
- Material
- Alaskae6
- Treatment
- SADH treatmente6
- Outcome
- Sucrose concentratione6
- Direction
- increasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological effects of drought were studied in two pea ( Pisum sativum L.) cultivars”
e6“Sucrose concentration increased in Alaska peas whereas net photosynthesis decreased in Hardy peas after SADH treatment”
Claim · model-written summary
SADH treatment decreased net photosynthesis in the Hardy pea cultivar.
- Taxon
- Pisum sativumLathyrus oleraceuse0
- Material
- Hardye6
- Treatment
- SADH treatmente6
- Outcome
- net photosynthesise6
- Direction
- decreasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological effects of drought were studied in two pea ( Pisum sativum L.) cultivars”
e6“Sucrose concentration increased in Alaska peas whereas net photosynthesis decreased in Hardy peas after SADH treatment”
Claim · model-written summary
SADH had no effect on reducing sugar and starch concentrations in pea.
- Taxon
- Pisum sativumLathyrus oleraceuse0
- Treatment
- SADHe7
- Outcome
- reducing sugar and starch concentrationse7
- Direction
- no effecte7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological effects of drought were studied in two pea ( Pisum sativum L.) cultivars”
e7“SADH had no effect on reducing sugar and starch concentrations”
Claim · model-written summary
SADH probably enabled pea plants to tolerate stress longer by decreasing energy requirements and metabolic degradation rates.
- Taxon
- Pisum sativumLathyrus oleraceuse0
- Treatment
- SADHe1
- Outcome
- tolerate stress longere1
- Qualifier
- decreasing energy requirements and metabolic degradation ratese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological effects of drought were studied in two pea ( Pisum sativum L.) cultivars”
e1“It was concluded that SADH treatment probably enabled plants to tolerate stress longer by decreasing energy requirements and metabolic degradation rates”
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See all 5 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.