Abstract
Abstract The total uptake and relative distribution of Na + along the root was investigated in excised barley roots ( Hordeum vulgare L. cv. Union) of 6‐day‐old plants cultured on 0.25 m M CaSO 4 . One technique involved cutting the roots at harvest time after different uptake periods into different segments each 2 cm long. These segments were ashed and sodium was measured by flame photometry. For each experiment two treatments were done, one containing calcium in the uptake solution and one without calcium. A second technique involved the measurement of sodium transport, using labelled 22 Na + solution. Although no significant differences could be found between the calcium containing and the calciumless treatments at 24 h, there were clearcut differences for the first 6 to 8 h. The effect of calcium on the first stages of the sodium uptake was a large accumulation of sodium in the part close to the apex with a translocation close to nil; whereas the sodium taken up in the absence of calcium did not accumulate in such large amounts in the apex region but was immediately transported basipetally.
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Claims 4
Claim · model-written summary
Calcium had no significant effect on sodium uptake in barley roots at 24 h.
- Taxon
- Hordeum vulgare
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Hordeum vulgaree5 - Material
- Unione5
- Treatment
- calcium containinge1
- Outcome
- total uptakee0
- Direction
- no significant differencese1
- Qualifier
- at 24 he1
- Comparator
- calciumless treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e5“Hordeum vulgare L. cv. Union”
e0“The total uptake and relative distribution of Na + along the root was investigated”
e1“Although no significant differences could be found between the calcium containing and the calciumless treatments at 24 h”
Claim · model-written summary
Calcium-containing and calcium-less treatments differed clearly during the first 6 to 8 h of sodium uptake.
- Taxon
- Hordeum vulgareHordeum vulgaree5
- Treatment
- calcium containinge1
- Outcome
- total uptakee0
- Qualifier
- first 6 to 8 he2
- Comparator
- calciumless treatmentse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Hordeum vulgare L. cv. Union”
e0“The total uptake and relative distribution of Na + along the root was investigated”
e1“Although no significant differences could be found between the calcium containing and the calciumless treatments at 24 h”
e2“there were clearcut differences for the first 6 to 8 h”
Claim · model-written summary
Calcium caused a large accumulation of sodium near the root apex with translocation close to nil in the first stages of uptake.
- Taxon
- Hordeum vulgareHordeum vulgaree5
- Treatment
- calciume3
- Outcome
- accumulation of sodiume3
- Direction
- large accumulatione3
- Qualifier
- translocation close to nile3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Hordeum vulgare L. cv. Union”
e3“The effect of calcium on the first stages of the sodium uptake was a large accumulation of sodium in the part close to the apex with a translocation close to nil”
Claim · model-written summary
Sodium taken up without calcium did not accumulate in the apex region and was transported basipetally.
- Taxon
- Hordeum vulgareHordeum vulgaree5
- Treatment
- absence of calciume4
- Outcome
- accumulate in such large amounts in the apex regione4
- Direction
- did not accumulatee4
- Qualifier
- immediately transported basipetallye4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Hordeum vulgare L. cv. Union”
e4“the sodium taken up in the absence of calcium did not accumulate in such large amounts in the apex region but was immediately transported basipetally”
The same questions in other papers
calcium atom · nutrient: content · Hordeum vulgare (barley)Positive and negative results
10 papers in the same direction as this paper · 15 in the opposite direction
- positive
- positive
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22 papers more in this group
See all 26 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.