Abstract
The effect of manganese on carbon assimilation, respiration, and translocation has been studied using isolated rooted potato leaves and small potato plants. Methods are described for the rooting and culture of the leaves and plants. It was found that normal potato leaves rooted readily when treated with α-naphtha-leneacetic acid (2 p.p.m.), but that very few of the manganese-deficient leaves produced roots, the critical level being about 15 p.p.m. manganese on a dry weight basis. The growth of isolated deficient leaves was also much less than that of control leaves, but in no case did characteristic manganese-deficiency symptoms develop, although the manganese level had fallen below that of leaves which showed symptoms when attached to the plant. A marked difference in net assimilation rate was found between leaves which had a high or low manganese content at the time of rooting. The addition of manganese after rooting to low manganese leaves did not, however, cause an increase in assimilation rate, although the manganese content of the leaves had been raised to that of the control leaves. Manganese was shown to have only a small effect on respiration, higher respiration rate being consistently associated with a higher manganese content; the addition of manganese to ‘deficient’ leaves did not cause any increase in respiration. No effect of manganese on translocation was detected.
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Claims 10
Claim · model-written summary
Manganese-deficient potato leaves very rarely produced roots compared with normal leaves.
- Taxon
- potato
Solanum tuberosume3 - Treatment
- manganese-deficiente2
- Outcome
- produced rootse2
- Direction
- very fewe2
- Comparator
- normal potato leavese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“normal potato leaves rooted readily”
e2“very few of the manganese-deficient leaves produced roots”
e3“isolated rooted potato leaves”
Claim · model-written summary
The critical manganese level for rooting of potato leaves was about 15 p.p.m. on a dry weight basis.
- Taxon
- potatoSolanum tuberosume3
- Outcome
- critical levele4
- Value
- about 15 p.p.m. manganese on a dry weight basise4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“isolated rooted potato leaves”
e4“the critical level being about 15 p.p.m. manganese on a dry weight basis”
Claim · model-written summary
Growth of manganese-deficient potato leaves was much less than that of control leaves.
- Taxon
- potatoSolanum tuberosume3
- Treatment
- deficient leavese5
- Outcome
- growthe5
- Direction
- much lesse5
- Comparator
- control leavese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“isolated rooted potato leaves”
e5“The growth of isolated deficient leaves was also much less than that of control leaves”
Claim · model-written summary
Isolated deficient potato leaves did not develop characteristic manganese-deficiency symptoms even though their manganese level fell below that of symptomatic leaves.
- Taxon
- potatoSolanum tuberosume3
- Outcome
- characteristic manganese-deficiency symptomse6
- Qualifier
- although the manganese level had fallen below that of leaves which showed symptoms when attached to the plante6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“isolated rooted potato leaves”
e6“in no case did characteristic manganese-deficiency symptoms develop, although the manganese level had fallen below that of leaves which showed symptoms when attached to the plant”
Claim · model-written summary
Net assimilation rate differed markedly between potato leaves with high and low manganese content at rooting.
- Taxon
- potatoSolanum tuberosume3
- Compound
- manganesee7
- Outcome
- net assimilation ratee7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“isolated rooted potato leaves”
e7“A marked difference in net assimilation rate was found between leaves which had a high or low manganese content at the time of rooting”
Claim · model-written summary
Adding manganese after rooting to low-manganese leaves did not increase their assimilation rate, although their manganese content was raised.
- Taxon
- potatoSolanum tuberosume3
- Treatment
- addition of manganese after rootinge4
- Outcome
- assimilation ratee4
- Direction
- did not, however, cause an increasee4
- Comparator
- low manganese leavese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“isolated rooted potato leaves”
e4“The addition of manganese after rooting to low manganese leaves did not, however, cause an increase in assimilation rate”
Claim · model-written summary
Manganese had only a small effect on respiration of potato leaves.
- Taxon
- potatoSolanum tuberosume3
- Compound
- manganesee4
- Outcome
- respiratione4
- Direction
- only a small effecte4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“isolated rooted potato leaves”
e4“Manganese was shown to have only a small effect on respiration”
Claim · model-written summary
Higher potato leaf respiration rate was consistently associated with higher manganese content.
- Taxon
- potatoSolanum tuberosume3
- Compound
- manganesee4
- Outcome
- respiration ratee4
- Direction
- highere4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“isolated rooted potato leaves”
e4“higher respiration rate being consistently associated with a higher manganese content”
Claim · model-written summary
Adding manganese to deficient potato leaves did not increase their respiration.
- Taxon
- potatoSolanum tuberosume3
- Treatment
- addition of manganesee4
- Outcome
- respiratione4
- Direction
- did not cause any increasee4
- Comparator
- deficiente4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“isolated rooted potato leaves”
e4“the addition of manganese to ‘deficient’ leaves did not cause any increase in respiration”
Claim · model-written summary
Manganese had no detectable effect on translocation in potato leaves.
- Taxon
- potatoSolanum tuberosume3
- Treatment
- manganesee4
- Outcome
- translocatione4
- Direction
- No effecte4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“isolated rooted potato leaves”
e4“No effect of manganese on translocation was detected”
The same questions in other papers
manganese atom · nutrient: content · Solanum tuberosum (potato)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- 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.