Abstract
SummaryThe effects of calcium and potassium levels on 45 Ca mobility, growth and nutritional disorders of strawberry plants have been studied in sand culture. More 45 Ca was fixed at the base (crown and roots) of plants grown under low-calcium conditions than under normal-calcium conditions, consequently less 45 Ca was found in leaves, runners and fruits of the former than in the latter plants. Translocation of both 45 Ca and non-labelled calcium was reduced by high levels of nutrient K. Calcium transport in plants is related to the general cation nutrient status in addition to the specific calcium content. An antagonistic potassium-calcium relationship was observed.Leaf tipburn, runner and petiole browning, and deformed fruits appeared in plants grown with little calcium (especially in combination with high potassium). Examination of tissues affected by calcium stress with a scanning electron microscope showed irregular structure and collapse of cells. For normal fruit development, and for preventing leaf tipburn, strawberry plants require a small but continuous supply of ionic calcium.
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Claims 8
Claim · model-written summary
Low calcium caused more 45 Ca fixation in strawberry crowns and roots than normal calcium.
Verbatim
e0“More 45 Ca was fixed at the base (crown and roots) of plants grown under low-calcium conditions than under normal-calcium conditions”
Claim · model-written summary
Low calcium left less 45 Ca in strawberry leaves, runners, and fruits.
- Taxon
- Strawberry
_single2.jpg?width=60)
Fragaria ×ananassat0 - Outcome
- 45 Ca was found in leaves, runners and fruitse0
- Direction
- lesse0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
t0“Strawberry Plants”
e0“consequently less 45 Ca was found in leaves, runners and fruits of the former than in the latter plants.”
Claim · model-written summary
High nutrient potassium reduced translocation of labeled and unlabeled calcium.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- high levels of nutrient Ke0
- Outcome
- Translocation of both 45 Ca and non-labelled calciume0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Strawberry Plants”
e0“Translocation of both 45 Ca and non-labelled calcium was reduced by high levels of nutrient K.”
Claim · model-written summary
Strawberry calcium transport was related to general cation nutrient status and calcium content.
- Taxon
- StrawberryFragaria ×ananassat0
- Compound
- calciume0
- Outcome
- Calcium transporte0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Strawberry Plants”
e0“Calcium transport in plants is related to the general cation nutrient status in addition to the specific calcium content.”
Claim · model-written summary
An antagonistic potassium-calcium relationship was observed in strawberry plants.
- Taxon
- StrawberryFragaria ×ananassat0
- Outcome
- antagonistic potassium-calcium relationshipe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Strawberry Plants”
e0“An antagonistic potassium-calcium relationship was observed.”
Claim · model-written summary
Low calcium, especially with high potassium, produced strawberry leaf tipburn, runner and petiole browning, and deformed fruits.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- little calciume0
- Outcome
- Leaf tipburn, runner and petiole browning, and deformed fruitse0
- Qualifier
- especially in combination with high potassiume0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Strawberry Plants”
e0“Leaf tipburn, runner and petiole browning, and deformed fruits appeared in plants grown with little calcium (especially in combination with high potassium).”
Claim · model-written summary
Calcium-stressed strawberry tissues had irregular structure and cell collapse.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- calcium stresse0
- Outcome
- irregular structure and collapse of cellse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Strawberry Plants”
e0“Examination of tissues affected by calcium stress with a scanning electron microscope showed irregular structure and collapse of cells.”
Claim · model-written summary
Normal strawberry fruit development and prevention of leaf tipburn require a small continuous ionic calcium supply.
- Taxon
- strawberry plantsFragaria ×ananassae0
- Outcome
- a small but continuous supply of ionic calciume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For normal fruit development, and for preventing leaf tipburn, strawberry plants require a small but continuous supply of ionic calcium.”
The same questions in other papers
calcium atom · disease · Fragaria x ananassa (strawberry)Positive and negative results
9 in the opposite direction
- positive
- positive
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6 papers more in this group
See all 10 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.