Abstract
Radioactivity measurement of leaf samples of tobacco plants following a 6-day absorption period in Ca 45 -labelled nutrient solution was found to be a rapid test for varietal differences in calcium uptake. Using this method, significant differences in the uptake of calcium were found among varieties and strains of flue-cured tobacco and the ranking of the calcium uptake potential of five strains of tobacco agreed with that obtained by chemical assay. The concentration of Ca 45 in the leaf tissue was highest in Delcrest and Hicks, lowest in White Mammoth, and intermediate in Virginia Gold, White Gold, and Jadel. The same ranking of these varieties was obtained when the plants were grown in soil with added Ca 45 for a 7-week absorption period. The importance of these tests is based on the findings of other workers that leaf content of calcium is inversely related to quality.
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Claims 7
Claim · model-written summary
Leaf radioactivity after six days in labeled nutrient solution rapidly tested varietal calcium uptake.
- Taxon
- tobacco
Nicotiana tabacume0 - Organ / stage
- leafe0
- Treatment
- Ca 45 -labelled nutrient solutione0
- Outcome
- rapid test for varietal differences in calcium uptakee0
- Comparator
- varietal differencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Radioactivity measurement of leaf samples of tobacco plants following a 6-day absorption period in Ca 45 -labelled nutrient solution was found to be a rapid test for varietal differences in calcium uptake.”
Claim · model-written summary
Calcium uptake differed significantly among flue-cured tobacco varieties and strains.
Verbatim
e0“significant differences in the uptake of calcium were found among varieties and strains of flue-cured tobacco”
Claim · model-written summary
The uptake ranking of five tobacco strains agreed with chemical assay results.
- Taxon
- tobaccoNicotiana tabacume0
- Material
- five strainse0
- Outcome
- ranking of the calcium uptake potentiale0
- Comparator
- chemical assaye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ranking of the calcium uptake potential of five strains of tobacco agreed with that obtained by chemical assay”
Claim · model-written summary
Leaf Ca 45 concentration was highest in Delcrest and Hicks.
- Taxon
- TOBACCONicotiana tabacumt0
- Material
- Delcrest and Hickse0
- Organ / stage
- leaf tissuee0
- Outcome
- concentration of Ca 45e0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concentration of Ca 45 in the leaf tissue was highest in Delcrest and Hicks”
t0“TOBACCO”
Claim · model-written summary
Leaf Ca 45 concentration was lowest in White Mammoth.
- Taxon
- TOBACCONicotiana tabacumt0
- Material
- White Mammothe0
- Organ / stage
- leaf tissuee1
- Outcome
- concentration of Ca 45e1
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lowest in White Mammoth”
e1“The concentration of Ca 45 in the leaf tissue was highest in Delcrest and Hicks, lowest in White Mammoth”
t0“TOBACCO”
Claim · model-written summary
Leaf Ca 45 concentration was intermediate in Virginia Gold, White Gold, and Jadel.
- Taxon
- TOBACCONicotiana tabacumt0
- Material
- Virginia Gold, White Gold, and Jadele0
- Organ / stage
- leaf tissuee1
- Outcome
- concentration of Ca 45e1
- Direction
- intermediatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“intermediate in Virginia Gold, White Gold, and Jadel”
e1“The concentration of Ca 45 in the leaf tissue was highest in Delcrest and Hicks, lowest in White Mammoth, and intermediate in Virginia Gold, White Gold, and Jadel”
t0“TOBACCO”
Claim · model-written summary
The same varietal ranking was found after seven weeks in soil with added Ca 45.
- Taxon
- TOBACCONicotiana tabacumt0
- Treatment
- soil with added Ca 45e0
- Outcome
- same ranking of these varietiese0
- Qualifier
- 7-week absorption periode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The same ranking of these varieties was obtained when the plants were grown in soil with added Ca 45 for a 7-week absorption period.”
t0“TOBACCO”