Abstract
ABSTRACT Increasing the calcium ion activity in salinized root media has often been shown to ameliorate the inhibitory effect of salinity on plant growth. In order to better define the biophysical mechanisms involved in these growth responses, we investigated the interactive effects of salinity and calcium on hydraulic conductivities and osmotic potential gradients in roots of maize seedlings. The length of the primary roots was reduced by 54% after 4 days of growth in 0.1-strength Hoagland solution salinized with 100 mM NaCl and by 20% when 10 mM calcium was also added to the salinized root medium. Roots showed 69% osmotic adjustment in response to salinization, with or without extra calcium in the root medium. The mean hydraulic conductivity, L, of the apical 4 cm of maize seedling roots was determined by assaying osmotically-induced backflow. The assay was sensitive enough to detect reductions in L induced by lowering the assay temperature from 27 to 14°C. These reductions in L exceeded those caused by...
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Claims 4
Claim · model-written summary
Salinization with 100 mM NaCl reduced primary-root length by 54% after four days.
- Organ / stage
- primary rootse0
- Treatment
- 100 mM NaCle0
- Outcome
- length of the primary rootse0
- Direction
- reducede0
- Value
- 54%e0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The length of the primary roots was reduced by 54% after 4 days of growth in 0.1-strength Hoagland solution salinized with 100 mM NaCl”
e1“roots of maize seedlings”
Claim · model-written summary
With 10 mM calcium also added to saline medium, primary-root length was reduced by 20%.
- Organ / stage
- primary rootse0
- Treatment
- 10 mM calcium was also added to the salinized root mediume0
- Outcome
- length of the primary rootse0
- Direction
- reducede0
- Value
- 20%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The length of the primary roots was reduced by 54% after 4 days of growth in 0.1-strength Hoagland solution salinized with 100 mM NaCl and by 20% when 10 mM calcium was also added to the salinized root medium.”
e1“roots of maize seedlings”
Claim · model-written summary
Roots showed 69% osmotic adjustment after salinization, with or without extra calcium.
- Organ / stage
- Rootse0
- Treatment
- salinizatione0
- Outcome
- osmotic adjustmente0
- Value
- 69%e0
- Qualifier
- with or without extra calcium in the root mediume0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Roots showed 69% osmotic adjustment in response to salinization, with or without extra calcium in the root medium.”
e1“roots of maize seedlings”
Claim · model-written summary
The hydraulic-conductivity assay detected reductions caused by lowering assay temperature from 27 to 14°C.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The assay was sensitive enough to detect reductions in L induced by lowering the assay temperature from 27 to 14°C.”
e1“maize seedling roots”
The same questions in other papers
salinity · physiology: water · Zea mays (maize)Positive and negative results
10 papers in the same direction as this paper · 31 in the opposite direction
- negative
- negative
- negative
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See all 42 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.