Abstract
Pitiuba cowpea (Vigna unguiculata (L.) Walp.) plants were grown in nutrient solution and kept in a greenhouse up to pre-flowering stage. They were subjected to four different treatments: nutrient solution; nutrient solution containing 75 mmol.L-1 NaCl; nutrient solution containing 75 mmol.L-1 NaCl and 5 mmol.L-1 CaCl2; and nutrient solution containing 75 mmol.L-1 NaCl and 10 mmol.L-1 CaCl2. Salt stress strongly inhibited plant growth, caused a disturbance in plant-water balance, and increased the total content of inorganic solutes in the different plant parts, due mainly to accumulation of Na+ and Cl-. It also increased leaf and root soluble carbohydrates, reduced soluble amino nitrogen both in root tips and in the youngest trifoliate leaves, and reduced proline levels in root tips. Although the addition of CaCl2 to the root environment of salt stressed plants caused a reduction in Na+ content, specially in roots, it did not ameliorate the salt stress effects on plant-water relations and growth. Therefore, the results obtained do not support the hypothesis that supplemental calcium would ameliorate the inhibitory effects of NaCl-stress.
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Claims 8
Claim · model-written summary
NaCl stress (75 mmol.L-1) strongly inhibited cowpea plant growth relative to nutrient solution alone, in a greenhouse.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- 75 mmol.L-1 NaCle1
- Outcome
- plant growthe2
- Direction
- inhibitede2
- Comparator
- nutrient solutione1
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“NaCl stressed cowpea plants”
e0“Pitiuba cowpea (Vigna unguiculata (L.) Walp.) plants were grown in nutrient solution and kept in a greenhouse up to pre-flowering stage”
e1“They were subjected to four different treatments: nutrient solution; nutrient solution containing 75 mmol.L-1 NaCl”
e2“Salt stress strongly inhibited plant growth”
Claim · model-written summary
NaCl stress caused a disturbance in cowpea plant-water balance relative to nutrient solution alone.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- 75 mmol.L-1 NaCle1
- Outcome
- plant-water balancee3
- Comparator
- nutrient solutione1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“NaCl stressed cowpea plants”
e1“They were subjected to four different treatments: nutrient solution; nutrient solution containing 75 mmol.L-1 NaCl”
e3“caused a disturbance in plant-water balance”
Claim · model-written summary
NaCl stress increased the total content of inorganic solutes in cowpea plant parts, due mainly to accumulation of Na+ and Cl-.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- different plant partse4
- Treatment
- 75 mmol.L-1 NaCle1
- Compound
- Na+ and Cl-e4
- Outcome
- total content of inorganic solutese4
- Direction
- increasede4
- Comparator
- nutrient solutione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“NaCl stressed cowpea plants”
e1“They were subjected to four different treatments: nutrient solution; nutrient solution containing 75 mmol.L-1 NaCl”
e4“increased the total content of inorganic solutes in the different plant parts, due mainly to accumulation of Na+ and Cl-”
Claim · model-written summary
Adding CaCl2 to the root environment of salt-stressed cowpea reduced Na+ content, especially in roots.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- rootse1
- Treatment
- addition of CaCl2 to the root environmente0
- Outcome
- Na+ contente1
- Direction
- reductione1
- Comparator
- salt stressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“NaCl stressed cowpea plants”
e0“the addition of CaCl2 to the root environment of salt stressed plants”
e1“caused a reduction in Na+ content, specially in roots”
Claim · model-written summary
Adding CaCl2 did not ameliorate the salt-stress effects on cowpea plant-water relations and growth.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- addition of CaCl2 to the root environmente0
- Outcome
- plant-water relations and growthe2
- Direction
- did not amelioratee2
- Comparator
- salt stressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“NaCl stressed cowpea plants”
e0“the addition of CaCl2 to the root environment of salt stressed plants”
e2“it did not ameliorate the salt stress effects on plant-water relations and growth”
Claim · model-written summary
NaCl stress increased leaf and root soluble carbohydrates in cowpea relative to nutrient solution alone.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- leaf and roote5
- Treatment
- 75 mmol.L-1 NaCle1
- Outcome
- soluble carbohydratese5
- Direction
- increasede5
- Comparator
- nutrient solutione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“NaCl stressed cowpea plants”
e1“They were subjected to four different treatments: nutrient solution; nutrient solution containing 75 mmol.L-1 NaCl”
e5“It also increased leaf and root soluble carbohydrates”
Claim · model-written summary
NaCl stress reduced soluble amino nitrogen in cowpea root tips and in the youngest trifoliate leaves.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- root tips and in the youngest trifoliate leavese6
- Treatment
- 75 mmol.L-1 NaCle1
- Outcome
- soluble amino nitrogene6
- Direction
- reducede6
- Comparator
- nutrient solutione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“NaCl stressed cowpea plants”
e1“They were subjected to four different treatments: nutrient solution; nutrient solution containing 75 mmol.L-1 NaCl”
e6“reduced soluble amino nitrogen both in root tips and in the youngest trifoliate leaves”
Claim · model-written summary
NaCl stress reduced proline levels in cowpea root tips relative to nutrient solution alone.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- root tipse7
- Treatment
- 75 mmol.L-1 NaCle1
- Outcome
- proline levelse7
- Direction
- reducede7
- Comparator
- nutrient solutione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“NaCl stressed cowpea plants”
e1“They were subjected to four different treatments: nutrient solution; nutrient solution containing 75 mmol.L-1 NaCl”
e7“reduced proline levels in root tips”
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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.