Abstract
In this report, we test the hypothesis that Na+ accumulation in the shoot in maize is negatively correlated with salt tolerance. Salt tolerance is defined as a percentage of the control on a dry weight basis. Two hybrids (Pioneer hybrid 3578 and Pioneer hybrid 3772) differing widely in Na+ accumulation were compared. Plants were treated with two types of salinity for 15 days (80 mol m-3 NaCl or 80 mol m-3 NaCl plus 8.75 mol m-3 CaCl2). Ion concentrations (Na+, K+, Ca2+ and Cl-) were measured in the roots, stalks, sheaths and leaves of plants harvested every third day. Ion concentrations were significantly affected by the treatments. Na+ and Cl- concentrations increased with salinity treatments; K+ and Ca2+ concentrations decreased. Supplemental Ca2+ increased Ca2+ and decreased Na+ concentrations. Hybrid 3772 maintained very low Na+ concentrations in the shoots, whereas 3578 did not. The largest distinction between the hybrids was in the ability to transport Na+ to the shoot; hybrid 3578 transported Na+ at twice the rate of hybrid 3772. In general, ion transport to the shoot appeared to be a function of root ion concentration. This model could account for the effects of NaCl salinity and supplemental Ca2+ on ion transport, although Na+ transport was complicated by an apparent reabsorption mechanism in the root and mesocotyl. The lack of correlation of Na+ accumulation in the shoot and other ion parameters with growth indicated that the mineral nutrition of the plants was not correlated with salt tolerance. It was concluded that the growth response of maize to salinity was primarily affected by osmotic factors.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Hybrid 3772 maintained very low Na+ concentrations in the shoots, whereas hybrid 3578 did not.
- Material
- Hybrid 3772e1
- Organ / stage
- shootse1
- Outcome
- Na+ concentrationse1
- Direction
- very lowe1
- Comparator
- 3578e1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“test the hypothesis that Na+ accumulation in the shoot in maize is negatively correlated with salt tolerance”
e1“Hybrid 3772 maintained very low Na+ concentrations in the shoots, whereas 3578 did not”
Claim · model-written summary
Hybrid 3578 transported Na+ to the shoot at twice the rate of hybrid 3772.
- Material
- hybrid 3578e1
- Outcome
- transported Na+e1
- Direction
- higherinferrede1
- Value
- twicee1
- Comparator
- hybrid 3772e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“test the hypothesis that Na+ accumulation in the shoot in maize is negatively correlated with salt tolerance”
e1“hybrid 3578 transported Na+ at twice the rate of hybrid 3772”
e2“The largest distinction between the hybrids was in the ability to transport Na+ to the shoot”
Claim · model-written summary
Ion concentrations in maize were significantly affected by the salinity treatments.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“test the hypothesis that Na+ accumulation in the shoot in maize is negatively correlated with salt tolerance”
e1“Ion concentrations were significantly affected by the treatments”
Claim · model-written summary
Salinity treatments increased Na+ and Cl- concentrations in maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“test the hypothesis that Na+ accumulation in the shoot in maize is negatively correlated with salt tolerance”
e1“Na+ and Cl- concentrations increased with salinity treatments”
Claim · model-written summary
Salinity treatments decreased K+ and Ca2+ concentrations in maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“test the hypothesis that Na+ accumulation in the shoot in maize is negatively correlated with salt tolerance”
e1“Na+ and Cl- concentrations increased with salinity treatments”
e2“K+ and Ca2+ concentrations decreased”
Claim · model-written summary
Supplemental Ca2+ increased Ca2+ concentrations in maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“test the hypothesis that Na+ accumulation in the shoot in maize is negatively correlated with salt tolerance”
e1“Supplemental Ca2+ increased Ca2+ and decreased Na+ concentrations”
Claim · model-written summary
Supplemental Ca2+ decreased Na+ concentrations in maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“test the hypothesis that Na+ accumulation in the shoot in maize is negatively correlated with salt tolerance”
e1“Supplemental Ca2+ increased Ca2+ and decreased Na+ concentrations”
Claim · model-written summary
Ion transport to the shoot in maize appeared to be a function of root ion concentration.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“test the hypothesis that Na+ accumulation in the shoot in maize is negatively correlated with salt tolerance”
e1“ion transport to the shoot appeared to be a function of root ion concentration”
Claim · model-written summary
Shoot Na+ accumulation was not correlated with maize growth.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“test the hypothesis that Na+ accumulation in the shoot in maize is negatively correlated with salt tolerance”
e1“The lack of correlation of Na+ accumulation in the shoot and other ion parameters with growth”
Claim · model-written summary
Growth response of maize to salinity was primarily affected by osmotic factors.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the growth response of maize to salinity was primarily affected by osmotic factors”
The same questions in other papers
calcium(2+) · nutrient: content · Zea mays (maize)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
salinity · physiology: ion balance · Zea mays (maize)Positive and negative results
32 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
32 papers more in this group
See all 36 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.