Abstract
Immature sugarcane was subjected to variable calcium (Ca) and manganese (Mn) in sand culture. Two levels of Ca were provided in factorial combination with three levels of Mn. Leaf samples were harvested for analysis after 3 months of treatment. There were three objectives: 1, To determine whether Ca could modify the rate of Mn uptake; 2, to determine main effects and interactions of Ca and Mn on specific enzymes; and 3, to study Ca and Mn effects on sugar and nucleotide content of leaves. The following results were obtained : 1. High Ca, 10 meq./liter, enhanced Mn uptake rather than cause Mn suppression. 2. Silicon content was decreased by high Mn (100 p.p.m.), but only when Ca was low. Ca thus is able to interfere with the Mn X Si interaction by which increasing Mn supply decreases Si uptake. 3. Leaf sucrose content was generally higher among plants receiving low Ca. This verifies observations by other workers. 4. High Mn appeared to substitute for high Ca in its influence upon sucrose content and amylase activity. A high-Ca effect upon amylase is induced by Mn without increasing Ca content. 5. High Mn greatly retarded amylase action when Ca supply was low, but had no effect when Ca supply was high. 6. Peroxidase action was relatively high among plants containing less sucrose, verifying earlier observations at this laboratory. High Ca greatly stimulated the enzyme. 7. Content of acid-soluble nucleotides did not vary greatly among treatments. Reducing sugar and total phosphorus content of nucleotide preparations varied strikingly. Sugar content was greatest in preparations from plants receiving both high Ca and high Mn. More than twice as much phosphorus was found in hydrolyzed, low-Ca nucleotide preparations than was present in those of plants receiving high Ca. Ca thus appears to affect the interconversion of organic and inorganic phosphorus. 8. Both Ca and Mn affected the number, concentration, and paper chromatographic properties of unknown fluorescing constituents obtained by anion-exchange chromatography. Adenosine, uridine, cytidine, and glucoseamine were tentatively identified. 9. Paper chromatograms revealed that the sugars glucose, maltose, and raffinose appeared in all peak U.V.-absorbing fractions. Glucoseamine and turanose were apparently present only in plants receiving both low Ca and low Mn. Results of this study suggest that Ca interacts with Mn in mineral absorption and enzyme effects, that Ca can alter known Mn X Si relationships, and that the consequences of variable Ca and Mn content are felt by the plant over a broad range of biochemical reactions.
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Claims 20
Claim · model-written summary
High Ca enhanced Mn uptake.
Not reportedComparator
Verbatim
e0“High Ca, 10 meq./liter, enhanced Mn uptake rather than cause Mn suppression”
t0“Sugarcane”
Claim · model-written summary
High Mn decreased silicon content when Ca was low.
- Taxon
- Sugarcanet0
- Treatment
- high Mn (100 p.p.m.)e0
- Outcome
- Silicon contente0
- Direction
- decreasede0
- Qualifier
- only when Ca was lowe0
Not reportedComparator
Verbatim
e0“Silicon content was decreased by high Mn (100 p.p.m.), but only when Ca was low”
t0“Sugarcane”
Claim · model-written summary
Low Ca was associated with higher leaf sucrose content.
Verbatim
e0“Leaf sucrose content was generally higher among plants receiving low Ca”
t0“Sugarcane”
Claim · model-written summary
High Mn appeared to substitute for high Ca in its effect on sucrose content.
Not reportedDirection
Verbatim
e0“High Mn appeared to substitute for high Ca in its influence upon sucrose content and amylase activity”
t0“Sugarcane”
Claim · model-written summary
High Mn appeared to substitute for high Ca in its effect on amylase activity.
Not reportedDirection
Verbatim
e0“High Mn appeared to substitute for high Ca in its influence upon sucrose content and amylase activity”
t0“Sugarcane”
Claim · model-written summary
Mn induced a high-Ca effect on amylase without raising Ca content.
Verbatim
e0“A high-Ca effect upon amylase is induced by Mn without increasing Ca content”
t0“Sugarcane”
Claim · model-written summary
High Mn greatly retarded amylase action under low Ca.
- Taxon
- Sugarcanet0
- Treatment
- High Mne0
- Gene
- amylasee0
- Outcome
- amylase actione0
- Direction
- retardede0
- Qualifier
- Ca supply was lowe0
Not reportedComparator
Verbatim
e0“High Mn greatly retarded amylase action when Ca supply was low”
t0“Sugarcane”
Claim · model-written summary
High Mn had no effect on amylase action under high Ca.
- Taxon
- Sugarcanet0
- Treatment
- High Mne0
- Outcome
- amylase actione0
- Direction
- no effecte0
- Qualifier
- Ca supply was highe0
Not reportedComparator
Verbatim
e0“High Mn greatly retarded amylase action when Ca supply was low, but had no effect when Ca supply was high”
t0“Sugarcane”
Claim · model-written summary
Peroxidase action was relatively high in plants with less sucrose.
Verbatim
e0“Peroxidase action was relatively high among plants containing less sucrose”
t0“Sugarcane”
Claim · model-written summary
High Ca greatly stimulated peroxidase.
Not reportedComparator
Verbatim
e0“High Ca greatly stimulated the enzyme”
t0“Sugarcane”
Claim · model-written summary
Acid-soluble nucleotide content varied little across treatments.
Verbatim
e0“Content of acid-soluble nucleotides did not vary greatly among treatments”
t0“Sugarcane”
Claim · model-written summary
Reducing sugar content of nucleotide preparations varied markedly.
Verbatim
e0“Reducing sugar and total phosphorus content of nucleotide preparations varied strikingly”
t0“Sugarcane”
Claim · model-written summary
Total phosphorus content of nucleotide preparations varied markedly.
Verbatim
e0“Reducing sugar and total phosphorus content of nucleotide preparations varied strikingly”
t0“Sugarcane”
Claim · model-written summary
Sugar content was greatest under high Ca plus high Mn.
Not reportedComparator
Verbatim
e0“Sugar content was greatest in preparations from plants receiving both high Ca and high Mn”
t0“Sugarcane”
Claim · model-written summary
Hydrolyzed low-Ca nucleotide preparations had more than twice the phosphorus of high-Ca preparations.
Verbatim
e0“More than twice as much phosphorus was found in hydrolyzed, low-Ca nucleotide preparations than was present in those of plants receiving high Ca”
t0“Sugarcane”
Claim · model-written summary
Ca and Mn affected the number, concentration, and chromatographic properties of unknown fluorescent constituents.
- Taxon
- Sugarcanet0
- Treatment
- Ca and Mne0
- Outcome
- number, concentration, and paper chromatographic properties of unknown fluorescing constituentse0
Not reportedComparatorDirection
Verbatim
e0“Both Ca and Mn affected the number, concentration, and paper chromatographic properties of unknown fluorescing constituents obtained by anion-exchange chromatography”
t0“Sugarcane”
Claim · model-written summary
Adenosine, uridine, cytidine, and glucoseamine were tentatively identified.
Verbatim
e0“Adenosine, uridine, cytidine, and glucoseamine were tentatively identified”
t0“Sugarcane”
Claim · model-written summary
Glucose, maltose, and raffinose appeared in all peak UV-absorbing fractions.
Verbatim
e0“the sugars glucose, maltose, and raffinose appeared in all peak U.V.-absorbing fractions”
t0“Sugarcane”
Claim · model-written summary
Glucoseamine appeared only in plants with low Ca and low Mn.
Verbatim
e0“Glucoseamine and turanose were apparently present only in plants receiving both low Ca and low Mn”
t0“Sugarcane”
Claim · model-written summary
Turanose appeared only in plants with low Ca and low Mn.
Verbatim
e0“Glucoseamine and turanose were apparently present only in plants receiving both low Ca and low Mn”
t0“Sugarcane”
The same questions in other papers
calcium atom · nutrient: content · Saccharum officinarum (sugarcane)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
2 papers more in this group
See all 6 papers →manganese atom · nutrient: content · Saccharum officinarum (sugarcane)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
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.