Abstract
Sorghum (Sorghum bicolor L.) was grown on an alkalinized plot for 90 days. Inorganic ions and compatible solutes were measured to investigate the physiological adaptations by which sorghum tolerates natural alkaline stress. Plant growth was clearly inhibited. The stress led to increased Na+ content in roots but had only a small effect on Na+ accumulation in leaves; K+ content in roots was lower than that in leaves and stems; and Na+ content and Na+/K+ ratio were much higher in roots than in leaves and stems. These suggest that maintaining a substantially higher osmotic potential in roots for greater uptake of water and restricting the spread of Na+ to shoots are physiological adaptations to alkalinity. Soluble sugar was the main osmolyte in roots, stems, and leaves; proline, amino acids, and oxalates contributed to osmotic regulation slightly, and it was noteworthy that K+ played a major role in osmotic regulation in leaves.
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Claims 9
Claim · model-written summary
Alkaline stress inhibited sorghum growth.
- Treatment
- natural alkaline stresse0
- Outcome
- Plant growthe0
- Direction
- inhibitede0
- Setting
- alkalinized plote0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sorghum (Sorghum bicolor L.) was grown on an alkalinized plot for 90 days. Inorganic ions and compatible solutes were measured to investigate the physiological adaptations by which sorghum tolerates natural alkaline stress. Plant growth was clearly inhibited”
Claim · model-written summary
Alkaline stress increased sodium content in sorghum roots.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The stress led to increased Na+ content in roots but had only a small effect on Na+ accumulation in leaves”
t0“Sorghum (Sorghum bicolor L.)”
Claim · model-written summary
Alkaline stress had only a small effect on sodium accumulation in sorghum leaves.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The stress led to increased Na+ content in roots but had only a small effect on Na+ accumulation in leaves”
t0“Sorghum (Sorghum bicolor L.)”
Claim · model-written summary
Sorghum root potassium content was lower than in leaves and stems.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K+ content in roots was lower than that in leaves and stems”
t0“Sorghum (Sorghum bicolor L.)”
Claim · model-written summary
Sorghum root sodium content and sodium to potassium ratio were much higher than in leaves and stems.
- Organ / stage
- rootse0
- Outcome
- Na+ content and Na+/K+ ratioe0
- Direction
- much highere0
- Comparator
- leaves and stemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Na+ content and Na+/K+ ratio were much higher in roots than in leaves and stems”
t0“Sorghum (Sorghum bicolor L.)”
Claim · model-written summary
Higher root osmotic potential and restricted sodium transport to shoots are proposed adaptations to alkalinity.
- Organ / stage
- rootse0
- Outcome
- physiological adaptations to alkalinitye0
- Qualifier
- greater uptake of watere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maintaining a substantially higher osmotic potential in roots for greater uptake of water and restricting the spread of Na+ to shoots are physiological adaptations to alkalinity”
t0“Sorghum (Sorghum bicolor L.)”
Claim · model-written summary
Soluble sugar was the main osmolyte in sorghum roots, stems and leaves.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soluble sugar was the main osmolyte in roots, stems, and leaves”
t0“Sorghum (Sorghum bicolor L.)”
Claim · model-written summary
Proline, amino acids and oxalates contributed slightly to osmotic regulation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proline, amino acids, and oxalates contributed to osmotic regulation slightly”
t0“Sorghum (Sorghum bicolor L.)”
Claim · model-written summary
Potassium had a major role in leaf osmotic regulation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K+ played a major role in osmotic regulation in leaves”
t0“Sorghum (Sorghum bicolor L.)”
The same questions in other papers
alkalinity · growth · SorghumPositive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
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.