Abstract
The influence of calcium (Ca ++ ) nutrition on the growth and root tissue electrolyte leakage (EL) of carrot ( Daucus carota ) was investigated using a hydroponic culture system. Seedlings of `Navajo' carrot were grown for 10 weeks with roots submersed in hydroponic nutrient solutions containing 0, 0.1, 1, 2, 4, or 8 meq/L Ca ++ . The nutrient solution was replenished weekly with its pH maintained at 5.8 for the entire experimental period. The tap root lengths increased as solution Ca ++ concentration increased. The diameter and fresh and dry weights of the tap roots increased as Ca ++ concentration increased up to 4 meq/L, and then decreased at 8 meq/L Ca ++ . The root and petiole concentrations of sugar, potassium, and nitrate were unaffected by changes in nutrient solution Ca ++ levels. The tissue EL, when tested for the stored roots, decreased as solution Ca ++ concentration increased ( r = 0.602). Results of this experiment suggest that calcium nutrition is essential for maintaining cell wall integrity in hydroponically grown carrot roots.
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Claims 5
Claim · model-written summary
Carrot tap root length increased with solution calcium concentration.
- Taxon
- carrot
Daucus carotat0 - Treatment
- solution Ca ++ concentratione0
- Outcome
- tap root lengthse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The tap root lengths increased as solution Ca ++ concentration increased”
t0“carrot”
Claim · model-written summary
Carrot tap root diameter and fresh and dry weights rose up to 4 meq/L calcium, then fell at 8 meq/L.
- Taxon
- carrotDaucus carotat0
- Treatment
- Ca ++ concentratione0
- Outcome
- diameter and fresh and dry weights of the tap rootse0
- Direction
- increasede0
- Qualifier
- up to 4 meq/L, and then decreased at 8 meq/L Ca ++e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The diameter and fresh and dry weights of the tap roots increased as Ca ++ concentration increased up to 4 meq/L, and then decreased at 8 meq/L Ca ++”
t0“carrot”
Claim · model-written summary
Root and petiole sugar, potassium, and nitrate concentrations were unchanged across calcium levels.
- Taxon
- carrotDaucus carotat0
- Treatment
- changes in nutrient solution Ca ++ levelse0
- Outcome
- root and petiole concentrations of sugar, potassium, and nitratee0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root and petiole concentrations of sugar, potassium, and nitrate were unaffected by changes in nutrient solution Ca ++ levels”
t0“carrot”
Claim · model-written summary
Stored carrot root tissue electrolyte leakage decreased as calcium concentration increased.
- Taxon
- carrotDaucus carotat0
- Treatment
- solution Ca ++ concentratione0
- Outcome
- tissue ELe0
- Direction
- decreasede0
- Qualifier
- stored rootse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The tissue EL, when tested for the stored roots, decreased as solution Ca ++ concentration increased ( r = 0.602)”
t0“carrot”
Claim · model-written summary
Calcium nutrition was inferred to maintain cell wall integrity in hydroponically grown carrot roots.
- Taxon
- carrotDaucus carotae0
- Organ / stage
- rootse0
- Treatment
- calcium nutritione0
- Outcome
- cell wall integritye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“calcium nutrition is essential for maintaining cell wall integrity in hydroponically grown carrot roots”
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25 papers more in this group
See all 29 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.