Abstract
The effect of zinc deficiency on plant growth and levels of carbonic anhydrase, ribulose diphosphate carboxylase, glycolic oxidase, and malic dehydrogenase was measured in two varieties of Phaseolus vulgaris L. Varieties ‘Saginaw’ and ‘Sanilac’ were grown in nutrient solution in a growth chamber at 0.005, 0.05, and 0.2 ppm zinc. Both varieties showed a similar increase in dry weight production after 4½ weeks of growth with increasing zinc concentrations. Enzyme, chlorophyll, and zinc analyses were made on the first, third, and fifth trifoliate leaf from the bottom of the plants. The level of carbonic anhydrase per unit leaf area was dramatically decreased in either variety at 0.005 and 0.05 ppm zinc when compared to 0.2 ppm zinc. The most severe reduction of carbonic anhydrase and zinc in the leaves was in the third and fifth trifoliate leaf. A decrease in growth with the lower levels of zinc was paralleled by a decrease in carbonic anhydrase activity and zinc levels in the younger trifoliate leaves. Zinc deficiency in the two varieties had little effect on the levels of ribulose 1,5‐diphosphate carboxylase, glycolic oxidase, or mallc dehydrogenase.
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Claims 5
Claim · model-written summary
Carbonic anhydrase per unit leaf area was dramatically decreased at 0.005 and 0.05 ppm zinc compared with 0.2 ppm zinc.
- Taxon
- Phaseolus vulgaris
Phaseolus vulgarise0 - Treatment
- 0.005 and 0.05 ppm zince1
- Outcome
- level of carbonic anhydrase per unit leaf areae1
- Direction
- dramatically decreasede1
- Comparator
- 0.2 ppm zince1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two varieties of Phaseolus vulgaris L”
e1“The level of carbonic anhydrase per unit leaf area was dramatically decreased in either variety at 0.005 and 0.05 ppm zinc when compared to 0.2 ppm zinc”
Claim · model-written summary
The most severe reduction of carbonic anhydrase and zinc was in the third and fifth trifoliate leaves.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Organ / stage
- third and fifth trifoliate leafe2
- Outcome
- reduction of carbonic anhydrase and zince2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two varieties of Phaseolus vulgaris L”
e2“The most severe reduction of carbonic anhydrase and zinc in the leaves was in the third and fifth trifoliate leaf”
Claim · model-written summary
Decreased growth at lower zinc levels was paralleled by decreased carbonic anhydrase activity and zinc levels in the younger trifoliate leaves.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Organ / stage
- younger trifoliate leavese3
- Treatment
- lower levels of zince3
- Outcome
- carbonic anhydrase activity and zinc levelse3
- Direction
- decreasee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two varieties of Phaseolus vulgaris L”
e3“A decrease in growth with the lower levels of zinc was paralleled by a decrease in carbonic anhydrase activity and zinc levels in the younger trifoliate leaves”
Claim · model-written summary
Zinc deficiency had little effect on ribulose 1,5‐diphosphate carboxylase, glycolic oxidase or malic dehydrogenase levels.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- Zinc deficiencye4
- Outcome
- levels of ribulose 1,5‐diphosphate carboxylase, glycolic oxidase, or mallc dehydrogenasee4
- Direction
- had little effecte4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two varieties of Phaseolus vulgaris L”
e4“Zinc deficiency in the two varieties had little effect on the levels of ribulose 1,5‐diphosphate carboxylase, glycolic oxidase, or mallc dehydrogenase”
Claim · model-written summary
Dry weight production of both Phaseolus varieties showed a similar increase with increasing zinc concentrations.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- increasing zinc concentrationse5
- Outcome
- dry weight productione5
- Direction
- similar increasee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two varieties of Phaseolus vulgaris L”
e5“Both varieties showed a similar increase in dry weight production after 4½ weeks of growth with increasing zinc concentrations”
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This paper is about lacking the nutrient, so it counts the other way round here.
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