Abstract
Heavy metals are essential and important for plants growth, and play as key components of many vital compounds. However, when they increase in concentration, heavy metals show symptoms such as growth delay and inhibition of biochemical reactions. The current study focused on the impact of five heavy metals (lead, chromium, nickel, cadmium, zinc) on growth and performance of common bean (Phaseolus vulgaris L. cv. Nebraska) plants before and after liming (CaCO3 + MgCO3) as soil correction treatment for the sake of remediation for heavy metal pollution in soil. Chemical analysis of carbohydrates showed significant increases in the contents of reducing sugars in response to lead, cadmium and nickel stress, which were decreased by liming treatments. The contents of total soluble sugars also increased in all heavy metal-treated plants but zinc. All heavy metals significantly lowered the leaf contents of the photosynthetic pigments (chlorophyll a, chlorophyll b and carotenoids). The sodium dodecyl sulphate polyacrylamide gel electrophoreseis (SDS-PAGE) of proteins indicated variations in the profile of electrophoretic protein bands in heavy metal-stressed common bean plants before and after liming. The results indicate that the investigated heavy metals were absorbed from the soil solution and then accumulated in the tissues of common bean plants in variable concentrations. The highest accumulation were lead (Pb) and chromium (Cr) then cadmium (Cd), zinc (Zn) and nickel (Ni) while the magnitude of limiting the retarding rate of absorption and accumulation was: Pb > Ni > Cr > Zn > Cd, respectively. Key words: Heavy metals, common bean, liming, chlorophyll.
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Claims 10
Claim · model-written summary
Lead stress significantly increased reducing sugars in common bean.
- Taxon
- common bean
Phaseolus vulgarist0 - Treatment
- leade0
- Outcome
- contents of reducing sugarse0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chemical analysis of carbohydrates showed significant increases in the contents of reducing sugars in response to lead, cadmium and nickel stress, which were decreased by liming treatments.”
t0“common bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Cadmium stress significantly increased reducing sugars in common bean.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- cadmiume0
- Outcome
- contents of reducing sugarse0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chemical analysis of carbohydrates showed significant increases in the contents of reducing sugars in response to lead, cadmium and nickel stress, which were decreased by liming treatments.”
t0“common bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Nickel stress significantly increased reducing sugars in common bean.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- nickele0
- Outcome
- contents of reducing sugarse0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chemical analysis of carbohydrates showed significant increases in the contents of reducing sugars in response to lead, cadmium and nickel stress, which were decreased by liming treatments.”
t0“common bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Liming decreased reducing sugars under lead, cadmium and nickel stress.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- liming treatmentse0
- Outcome
- reducing sugarse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chemical analysis of carbohydrates showed significant increases in the contents of reducing sugars in response to lead, cadmium and nickel stress, which were decreased by liming treatments.”
t0“common bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Total soluble sugars increased with heavy metals except zinc.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- heavy metal-treatede0
- Outcome
- contents of total soluble sugarse0
- Direction
- increasede0
- Qualifier
- but zince0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The contents of total soluble sugars also increased in all heavy metal-treated plants but zinc.”
t0“common bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Heavy metals significantly lowered leaf chlorophyll a, chlorophyll b and carotenoids.
- Taxon
- common beanPhaseolus vulgarist0
- Organ / stage
- leafe0
- Treatment
- heavy metalse0
- Outcome
- leaf contents of the photosynthetic pigments (chlorophyll a, chlorophyll b and carotenoids)e0
- Direction
- lowerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All heavy metals significantly lowered the leaf contents of the photosynthetic pigments (chlorophyll a, chlorophyll b and carotenoids).”
t0“common bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Protein-band profiles varied with heavy-metal stress and liming.
- Taxon
- common beanPhaseolus vulgarise0
- Treatment
- heavy metal-stressede0
- Outcome
- variations in the profile of electrophoretic protein bandse0
- Qualifier
- before and after liminge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sodium dodecyl sulphate polyacrylamide gel electrophoreseis (SDS-PAGE) of proteins indicated variations in the profile of electrophoretic protein bands in heavy metal-stressed common bean plants before and after liming.”
Claim · model-written summary
Heavy metals accumulated in common bean tissues at variable concentrations.
- Taxon
- common beanPhaseolus vulgarise0
- Organ / stage
- tissuese0
- Outcome
- accumulated in the tissuese0
- Qualifier
- variable concentrationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results indicate that the investigated heavy metals were absorbed from the soil solution and then accumulated in the tissues of common bean plants in variable concentrations.”
Claim · model-written summary
Lead and chromium had the highest accumulation, followed by cadmium, zinc and nickel.
- Taxon
- common beanPhaseolus vulgarist0
- Outcome
- highest accumulatione0
- Direction
- higheste0
- Qualifier
- lead (Pb) and chromium (Cr) then cadmium (Cd), zinc (Zn) and nickel (Ni)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest accumulation were lead (Pb) and chromium (Cr) then cadmium (Cd), zinc (Zn) and nickel (Ni)”
t0“common bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Liming limited absorption and accumulation in the order Pb > Ni > Cr > Zn > Cd.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- liminge1
- Outcome
- absorption and accumulatione0
- Direction
- limitinge0
- Qualifier
- Pb > Ni > Cr > Zn > Cde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the magnitude of limiting the retarding rate of absorption and accumulation was: Pb > Ni > Cr > Zn > Cd”
t0“common bean (Phaseolus vulgaris L.)”
e1“plants before and after liming.”
The same questions in other papers
lime · quality: sugar starch · Phaseolus vulgaris (common bean)Results agree
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- positive
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heavy metal · physiology: photosynthesis · Phaseolus vulgaris (common bean)Results agree
5 papers in the same direction as this paper
- negative
- negative
- negative
2 papers more in this group
See all 6 papers →lime · nutrient: content · Phaseolus vulgaris (common bean)Results agree
14 papers in the same direction as this paper
- positive
- positive
- positive
11 papers more in this group
See all 15 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.