Abstract
A large-scale pot experiment was accomplished for investigation of the varied effects of different concentrations of Cu and Cd on certain growth and metabolic attributes of roots and shoots of Phaseolus vulgaris plants, over a period of three weeks. Plants supplemented with Cu and Cd at the concentrations of 10-6 and 10-3 M, showed increased levels of Cu and Cd in both shoots and roots, above those levels in controls. However, Cu or Cd accumulation was lower in shoots than in roots. As compared with control levels, the low (10-6 M) concentration of Cu induced either a significant or an insignificant increase in growth parameters, photosynthetic pigments, PS II activity, glucose, proline and glycine contents in both roots and shoots. Otherwise, insignificant decreases in fructose, sucrose, polysaccharides, total saccharides, total soluble-N, protein –N, DNA and RNA contents, in the same test plant parts, were obtained. A reverse situation was however observed with the high concentration (10-3 M) of Cu as well as with the low and high concentrations (10-3 and 10-6 M) of Cd. In general, the observed adverse effects were more pronounced with Cd at (10-6 M) as compared with those maintained with Cu at the same concentration. Furthermore, the most detrimental adverse effects were apparent upon administration of the high (10-3 M) concentration of Cd. The prominence of the above mentioned changes in growth and metabolism to stress tolerance in common bean is discussed.
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Claims 12
Claim · model-written summary
Cu supplementation increased Cu in roots and shoots above controls.
- Taxon
- Phaseolus vulgaris
Phaseolus vulgarist0 - Organ / stage
- shoots and rootse0
- Treatment
- Cue0
- Outcome
- levels of Cue0
- Direction
- increasede0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants supplemented with Cu and Cd at the concentrations of 10-6 and 10-3 M, showed increased levels of Cu and Cd in both shoots and roots, above those levels in controls”
t0“Phaseolus vulgaris”
Claim · model-written summary
Cd supplementation increased Cd in roots and shoots above controls.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Organ / stage
- shoots and rootse0
- Treatment
- Cde0
- Outcome
- levels of Cu and Cde0
- Direction
- increasede0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants supplemented with Cu and Cd at the concentrations of 10-6 and 10-3 M, showed increased levels of Cu and Cd in both shoots and roots, above those levels in controls”
t0“Phaseolus vulgaris”
Claim · model-written summary
Cu accumulation was lower in shoots than roots.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Organ / stage
- shootse0
- Outcome
- Cu or Cd accumulatione0
- Direction
- lowere0
- Comparator
- rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cu or Cd accumulation was lower in shoots than in roots”
t0“Phaseolus vulgaris”
Claim · model-written summary
Low Cu increased growth parameters, photosynthetic pigments and PS II activity, with mixed significance.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Treatment
- low (10-6 M) concentration of Cue0
- Outcome
- growth parameters, photosynthetic pigments, PS II activitye0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the low (10-6 M) concentration of Cu induced either a significant or an insignificant increase in growth parameters, photosynthetic pigments, PS II activity”
t0“Phaseolus vulgaris”
Claim · model-written summary
Low Cu increased glucose, proline and glycine contents, with mixed significance.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Treatment
- low (10-6 M) concentration of Cue0
- Outcome
- glucose, proline and glycine contentse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the low (10-6 M) concentration of Cu induced either a significant or an insignificant increase in growth parameters, photosynthetic pigments, PS II activity, glucose, proline and glycine contents”
t0“Phaseolus vulgaris”
Claim · model-written summary
Low Cu was associated with insignificant decreases in fructose, sucrose and polysaccharides.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Outcome
- fructose, sucrose, polysaccharidese0
- Direction
- decreasese0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“insignificant decreases in fructose, sucrose, polysaccharides, total saccharides, total soluble-N, protein –N, DNA and RNA contents”
t0“Phaseolus vulgaris”
Claim · model-written summary
Low Cu was associated with insignificant decreases in total saccharides, soluble N and protein N.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Outcome
- total saccharides, total soluble-N, protein –Ne0
- Direction
- decreasese0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“insignificant decreases in fructose, sucrose, polysaccharides, total saccharides, total soluble-N, protein –N, DNA and RNA contents”
t0“Phaseolus vulgaris”
Claim · model-written summary
Low Cu was associated with insignificant decreases in DNA and RNA contents.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Outcome
- DNA and RNA contentse0
- Direction
- decreasese0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“insignificant decreases in fructose, sucrose, polysaccharides, total saccharides, total soluble-N, protein –N, DNA and RNA contents”
t0“Phaseolus vulgaris”
Claim · model-written summary
High Cu reversed the low Cu pattern in growth and metabolism.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Treatment
- high concentration (10-3 M) of Cue0
- Outcome
- reverse situatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A reverse situation was however observed with the high concentration (10-3 M) of Cu”
t0“Phaseolus vulgaris”
Claim · model-written summary
Low and high Cd reversed the low Cu pattern.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Treatment
- low and high concentrations (10-3 and 10-6 M) of Cde0
- Outcome
- reverse situatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A reverse situation was however observed with the high concentration (10-3 M) of Cu as well as with the low and high concentrations (10-3 and 10-6 M) of Cd”
t0“Phaseolus vulgaris”
Claim · model-written summary
At the same concentration, Cd had stronger adverse effects than Cu.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Treatment
- Cd at (10-6 M)e0
- Outcome
- adverse effectse0
- Direction
- more pronouncede0
- Comparator
- Cu at the same concentratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“adverse effects were more pronounced with Cd at (10-6 M) as compared with those maintained with Cu at the same concentration”
t0“Phaseolus vulgaris”
Claim · model-written summary
High Cd produced the most detrimental effects.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Treatment
- high (10-3 M) concentration of Cde0
- Outcome
- adverse effectse0
- Direction
- most detrimentale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most detrimental adverse effects were apparent upon administration of the high (10-3 M) concentration of Cd”
t0“Phaseolus vulgaris”
The same questions in other papers
copper atom · physiology: photosynthesis · Phaseolus vulgaris (common bean)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
1 paper more in this group
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.