Abstract
Remediation of salt affected soil using organic matter (OM) chelating agent is an effective procedure with low cost, simple and sustainable techniques. We investigated the physio-biochemical responses of two legume species viz. cowpea (Vigna unguiculata Walp.) and jack bean (Canavalia ensiformis [L.] DC.) to salt stress with a view to select model plant species for salt-remediation. Seeds of jack bean and cowpea were geminated, planted in the pot culture then the various salt concentrations (0, 50, 100, 150 and 200 mM NaCl) were treated and physiological and morphological data were collected. Sodium ions (Na+), free proline and relative electrolyte leakage in salt stressed seedlings of two legumes were significantly increased in response to increase salt stress. In contrast, potassium ions (K+), water use efficiency (WUE), chlorophyll a and chlorophyll b pigments in cowpea were sharply dropped when subjected to 200 mM NaCl salt stress for 66.81%, 86.14%, 61.35% and 65.62%, respectively, indicating the physiological declines in the salt stressed plants. The K+ reduction, WUE reduction and pigment degradation in salt stressed seedlings of jack bean were lower than those in cowpea, indicating as salt tolerant indices. Also, the maximum quantum yield (Fv/Fm) and photon yield of PSII (PSII) were decreased for 26.02% and 30.18% in cowpea when seedlings exposed to 200 mM NaCl salt stress, leading to reduce net photosynthetic rate (Pn). A positive relation between PSII and Pn was demonstrated in both jack bean and cowpea legumes. In addition, overall growth performances in salt stressed seedlings of two legumes were considerably declined. Jack bean was a candidate legume to play a role as green manure for saline soil remediation upon to salt tolerant ability.
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Claims 12
Claim · model-written summary
Sodium ions, free proline and relative electrolyte leakage increased significantly under salt stress in both legumes.
- Taxon
- two legumese1
- Treatment
- salt stresse1
- Outcome
- Sodium ions (Na+), free proline and relative electrolyte leakagee1
- Direction
- increasede1
Not reportedComparator
Verbatim
e1“Sodium ions (Na+), free proline and relative electrolyte leakage in salt stressed seedlings of two legumes were significantly increased in response to increase salt stress”
Claim · model-written summary
Potassium ion content in cowpea dropped sharply (66.81%) at 200 mM NaCl.
- Taxon
- cowpea
Vigna unguiculatae2 - Treatment
- 200 mM NaCl salt stresse2
- Outcome
- potassium ions (K+)e2
- Direction
- sharply droppede2
- Value
- 66.81%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In contrast, potassium ions (K+), water use efficiency (WUE), chlorophyll a and chlorophyll b pigments in cowpea were sharply dropped when subjected to 200 mM NaCl salt stress for 66.81%, 86.14%, 61.35% and 65.62%, respectively”
Claim · model-written summary
Water use efficiency in cowpea dropped sharply (86.14%) at 200 mM NaCl.
- Taxon
- cowpeaVigna unguiculatae2
- Treatment
- 200 mM NaCl salt stresse2
- Outcome
- water use efficiency (WUE)e2
- Direction
- sharply droppede2
- Value
- 86.14%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In contrast, potassium ions (K+), water use efficiency (WUE), chlorophyll a and chlorophyll b pigments in cowpea were sharply dropped when subjected to 200 mM NaCl salt stress for 66.81%, 86.14%, 61.35% and 65.62%, respectively”
Claim · model-written summary
Chlorophyll a in cowpea dropped sharply (61.35%) at 200 mM NaCl.
- Taxon
- cowpeaVigna unguiculatae2
- Treatment
- 200 mM NaCl salt stresse2
- Outcome
- chlorophyll ae2
- Direction
- sharply droppede2
- Value
- 61.35%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In contrast, potassium ions (K+), water use efficiency (WUE), chlorophyll a and chlorophyll b pigments in cowpea were sharply dropped when subjected to 200 mM NaCl salt stress for 66.81%, 86.14%, 61.35% and 65.62%, respectively”
Claim · model-written summary
Chlorophyll b in cowpea dropped sharply (65.62%) at 200 mM NaCl.
- Taxon
- cowpeaVigna unguiculatae2
- Treatment
- 200 mM NaCl salt stresse2
- Outcome
- chlorophyll b pigmentse2
- Direction
- sharply droppede2
- Value
- 65.62%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In contrast, potassium ions (K+), water use efficiency (WUE), chlorophyll a and chlorophyll b pigments in cowpea were sharply dropped when subjected to 200 mM NaCl salt stress for 66.81%, 86.14%, 61.35% and 65.62%, respectively”
Claim · model-written summary
Potassium, water use efficiency and pigment reductions were lower in jack bean than in cowpea under salt stress.
- Taxon
- jack bean
Canavalia ensiformise3 - Treatment
- salt stresse3
- Outcome
- K+ reduction, WUE reduction and pigment degradatione3
- Direction
- lowere3
- Comparator
- cowpeae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The K+ reduction, WUE reduction and pigment degradation in salt stressed seedlings of jack bean were lower than those in cowpea, indicating as salt tolerant indices”
Claim · model-written summary
Maximum quantum yield (Fv/Fm) in cowpea decreased 26.02% at 200 mM NaCl.
- Taxon
- cowpeaVigna unguiculatae4
- Treatment
- 200 mM NaCl salt stresse4
- Outcome
- maximum quantum yield (Fv/Fm)e4
- Direction
- decreasede4
- Value
- 26.02%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Also, the maximum quantum yield (Fv/Fm) and photon yield of PSII (PSII) were decreased for 26.02% and 30.18% in cowpea when seedlings exposed to 200 mM NaCl salt stress, leading to reduce net photosynthetic rate (Pn)”
Claim · model-written summary
Photon yield of PSII in cowpea decreased 30.18% at 200 mM NaCl.
- Taxon
- cowpeaVigna unguiculatae4
- Treatment
- 200 mM NaCl salt stresse4
- Outcome
- photon yield of PSII (PSII)e4
- Direction
- decreasede4
- Value
- 30.18%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Also, the maximum quantum yield (Fv/Fm) and photon yield of PSII (PSII) were decreased for 26.02% and 30.18% in cowpea when seedlings exposed to 200 mM NaCl salt stress, leading to reduce net photosynthetic rate (Pn)”
Claim · model-written summary
Reduced PSII photochemistry leads to reduced net photosynthetic rate (Pn) in cowpea under salt stress (authors interpretation).
- Taxon
- cowpeaVigna unguiculatae4
- Treatment
- 200 mM NaCl salt stresse4
- Outcome
- net photosynthetic rate (Pn)e4
- Direction
- reducee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Also, the maximum quantum yield (Fv/Fm) and photon yield of PSII (PSII) were decreased for 26.02% and 30.18% in cowpea when seedlings exposed to 200 mM NaCl salt stress, leading to reduce net photosynthetic rate (Pn)”
Claim · model-written summary
PSII and Pn were positively related in jack bean and cowpea.
Verbatim
e5“A positive relation between PSII and Pn was demonstrated in both jack bean and cowpea legumes”
Claim · model-written summary
Overall growth performance of both legumes was considerably declined under salt stress.
- Taxon
- two legumese6
- Treatment
- salt stresse6
- Outcome
- overall growth performancese6
- Direction
- considerably declinede6
Not reportedComparator
Verbatim
e6“In addition, overall growth performances in salt stressed seedlings of two legumes were considerably declined”
Claim · model-written summary
Jack bean is a candidate legume for green manure in saline soil remediation (authors conclusion).
- Taxon
- Jack beanCanavalia ensiformise7
- Outcome
- green manure for saline soil remediatione7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Jack bean was a candidate legume to play a role as green manure for saline soil remediation upon to salt tolerant ability”
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See all 10 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.