Abstract
The relationships between dry matter yield and ion concentration in three tropical grain legumes, viz. guar, cowpea and blackgram, were examined in soil salinized with a range of isosmotic levels of NaCl, CaCl2 and Na2SO4. The shoot yield of guar and cowpea was reduced to 50% of the control, at soil salt levels corresponding to electrical conductivities determined on saturated extracts (ECe,50%) of 11.8 and 11.6 dS m-1 respectively, the response being independent of the form of salt used. Both these species maintained low Na+ in shoots but accumulated moderate levels of Cl- in the presence of Cl- salts. The shoot yield of blackgram was less affected by CaCl2 salinity than NaCl salinity (i.e. ECe,50% = 13.6 dS m-1 compared with 8.8 dS m-1 respectively), whilst the growth response to Na2SO, was intermediate (ECe,50% = 10.8 dS m-1. Blackgram was found to accumulate large quantities of both Na+ (up to 1500 8mol g-1) and Cl- (up to 8 g-1) in shoot tissues. The use of isosmotic levels of different salts enabled the effects on growth of variation in ion concentration of shoots to be assessed, at the same potential level of water deficit. There was no evidence that ion excess was limiting growth of guar or cowpea, since large differences in ion concentration were not related to differences in dry matter yield. There was evidence that high ion concentrations in the shoots of blackgram, in particular high Na+ , limited growth under salinity stress. It is suggested that some benefit may be gained by searching for blackgram cultivars that accumulate less Na+ in shoots.
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Claims 14
Claim · model-written summary
Guar shoot yield fell to 50% of control at 11.8 dS m-1, independently of salt form.
- Taxon
- guar
Cyamopsis tetragonolobae0 - Treatment
- soil salt levelse0
- Outcome
- shoot yielde0
- Direction
- reducede0
- Value
- 11.8e0
- Qualifier
- independent of the form of salt usede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The shoot yield of guar and cowpea was reduced to 50% of the control, at soil salt levels corresponding to electrical conductivities determined on saturated extracts (ECe,50%) of 11.8 and 11.6 dS m-1 respectively, the response being independent of the form of salt used”
Claim · model-written summary
Cowpea shoot yield fell to 50% of control at 11.6 dS m-1, independently of salt form.
- Taxon
- cowpea
Vigna unguiculatae0 - Treatment
- soil salt levelse0
- Outcome
- shoot yielde0
- Direction
- reducede0
- Value
- 11.6 dS m-1e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The shoot yield of guar and cowpea was reduced to 50% of the control, at soil salt levels corresponding to electrical conductivities determined on saturated extracts (ECe,50%) of 11.8 and 11.6 dS m-1 respectively, the response being independent of the form of salt used”
Claim · model-written summary
Guar maintained low shoot sodium under salt treatments.
- Taxon
- guarCyamopsis tetragonolobae1
- Outcome
- low Na+ in shootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both these species maintained low Na+ in shoots”
e1“viz. guar, cowpea and blackgram”
Claim · model-written summary
Cowpea maintained low shoot sodium under salt treatments.
- Taxon
- cowpeaVigna unguiculatae1
- Outcome
- low Na+ in shootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both these species maintained low Na+ in shoots”
e1“viz. guar, cowpea and blackgram”
Claim · model-written summary
Guar accumulated moderate chloride under chloride salts.
- Taxon
- guarCyamopsis tetragonolobae1
- Treatment
- Cl- saltse0
- Outcome
- moderate levels of Cl-e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“accumulated moderate levels of Cl- in the presence of Cl- salts”
e1“viz. guar, cowpea and blackgram”
Claim · model-written summary
Cowpea accumulated moderate chloride under chloride salts.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- Cl- saltse0
- Outcome
- moderate levels of Cl-e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“accumulated moderate levels of Cl- in the presence of Cl- salts”
e1“viz. guar, cowpea and blackgram”
Claim · model-written summary
Blackgram yield was less affected by CaCl2 than NaCl salinity, with ECe50 values of 13.6 and 8.8 dS m-1.
- Taxon
- blackgram
Vigna mungoe0 - Treatment
- CaCl2 salinitye0
- Outcome
- shoot yielde0
- Direction
- less affectede0
- Value
- 13.6 dS m-1e0
- Qualifier
- 8.8 dS m-1e0
- Comparator
- NaCl salinitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The shoot yield of blackgram was less affected by CaCl2 salinity than NaCl salinity (i.e. ECe,50% = 13.6 dS m-1 compared with 8.8 dS m-1 respectively)”
Claim · model-written summary
Blackgram response to Na2SO4 was intermediate, at ECe50 of 10.8 dS m-1.
- Taxon
- blackgramVigna mungoe1
- Treatment
- Na2SO,e0
- Outcome
- growth responsee0
- Direction
- intermediatee0
- Value
- 10.8 dS m-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth response to Na2SO, was intermediate (ECe,50% = 10.8 dS m-1”
e1“viz. guar, cowpea and blackgram”
Claim · model-written summary
Blackgram accumulated sodium up to 1500 8mol g-1 in shoots.
- Taxon
- BlackgramVigna mungoe0
- Organ / stage
- shoot tissuese0
- Outcome
- Na+e0
- Value
- 1500 8mol g-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Blackgram was found to accumulate large quantities of both Na+ (up to 1500 8mol g-1) and Cl- (up to 8 g-1) in shoot tissues”
Claim · model-written summary
Blackgram accumulated chloride up to 8 g-1 in shoots.
- Taxon
- BlackgramVigna mungoe0
- Organ / stage
- shoot tissuese0
- Outcome
- Cl-e0
- Value
- 8 g-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Blackgram was found to accumulate large quantities of both Na+ (up to 1500 8mol g-1) and Cl- (up to 8 g-1) in shoot tissues”
Claim · model-written summary
Large ion differences were unrelated to guar dry matter yield.
- Taxon
- guarCyamopsis tetragonolobae0
- Compound
- ion concentratione0
- Outcome
- dry matter yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no evidence that ion excess was limiting growth of guar or cowpea, since large differences in ion concentration were not related to differences in dry matter yield”
Claim · model-written summary
Large ion differences were unrelated to cowpea dry matter yield.
- Taxon
- cowpeaVigna unguiculatae0
- Compound
- ion concentratione0
- Outcome
- dry matter yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no evidence that ion excess was limiting growth of guar or cowpea, since large differences in ion concentration were not related to differences in dry matter yield”
Claim · model-written summary
High shoot sodium appeared to limit blackgram growth under salinity.
- Taxon
- blackgramVigna mungoe0
- Organ / stage
- shootse0
- Compound
- Na+e0
- Outcome
- growthe0
- Qualifier
- under salinity stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was evidence that high ion concentrations in the shoots of blackgram, in particular high Na+ , limited growth under salinity stress”
Claim · model-written summary
The authors suggest seeking blackgram cultivars with lower shoot sodium accumulation.
- Taxon
- blackgramVigna mungoe0
- Outcome
- cultivars that accumulate less Na+ in shootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is suggested that some benefit may be gained by searching for blackgram cultivars that accumulate less Na+ in shoots”
The same questions in other papers
calcium chloride dihydrate · yield · Vigna mungo (black gram)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
salinity · yield · Cyamopsis tetragonoloba (cluster bean)Results differ
9 papers in the same direction as this paper
- no effect
- negative
- negative
6 papers more in this group
See all 10 papers →salinity · yield · Vigna unguiculata (cowpea)Results differ
20 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
19 papers more in this group
See all 23 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.