Abstract
The production of sorghum [ Sorghum bicolor (L.) Moench], a moderately salt‐tolerant crop, often occurs in areas of relatively low rainfall and on marginal soils containing excess salts. Despite the importance of sorghum to agriculture, relatively less is known about its response to these stressful environments than that of other major cereal grain crops. The purpose of this investigation was to study the effects of moderate levels of salinity on growth, assimilate partitioning, and mineral nutrient relations of a single cultivar of sorghum under both field and greenhouse conditions. Sorghum dry matter production decreased substantially in response to a moderate increase in soil electrical conductivity (2.1 to 5.9 dS m −1 ). Overall, total shoot and root dry weights of greenhouse‐grown plants decreased to a greater extent by moderate (−0.2 and −0.4 MPa) additions of isosmotic concentrations of NaCl than Na 2 SO 4 . However, at higher salinity levels (− 0.6 MPa), growth was more inhibited by Na 2 SO 4 . Sheath tissues of the leaves of NaCl‐stressed plants tended to accumulate chloride. Sodium concentrations in the roots of control and NaCl‐treated plants were significantly higher than in shoot tissues at all salinity levels. At higher concentrations of Na 2 SO 4 , this exclusion of Na from the shoot broke down and resulted in a dramatic increase in the Na levels of shoot tissue and concurrent decrease in K and Mg concentrations. Seminal roots contained more Ca, Mg, Cl, and Na, while adventitious roots were higher in K.
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Claims 9
Claim · model-written summary
Higher soil electrical conductivity substantially decreased sorghum dry matter production.
- Treatment
- moderate increase in soil electrical conductivitye0
- Outcome
- dry matter productione0
- Direction
- decreasede0
- Value
- 2.1 to 5.9 dS m −1e0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sorghum dry matter production decreased substantially in response to a moderate increase in soil electrical conductivity (2.1 to 5.9 dS m −1 )”
Claim · model-written summary
Moderate NaCl reduced greenhouse shoot and root dry weights more than isosmotic Na 2 SO 4.
- Treatment
- NaCle0
- Outcome
- total shoot and root dry weightse0
- Direction
- decreased to a greater extente0
- Value
- −0.2 and −0.4 MPae0
- Comparator
- Na 2 SO 4e0
- Setting
- greenhouse‐growne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total shoot and root dry weights of greenhouse‐grown plants decreased to a greater extent by moderate (−0.2 and −0.4 MPa) additions of isosmotic concentrations of NaCl than Na 2 SO 4”
e1“sorghum [ Sorghum bicolor (L.) Moench]”
Claim · model-written summary
At higher salinity, Na 2 SO 4 inhibited growth more than NaCl.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at higher salinity levels (− 0.6 MPa), growth was more inhibited by Na 2 SO 4”
e1“than Na 2 SO 4”
e2“sorghum [ Sorghum bicolor (L.) Moench]”
Claim · model-written summary
Leaf sheaths of NaCl stressed plants tended to accumulate chloride.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sheath tissues of the leaves of NaCl‐stressed plants tended to accumulate chloride”
e1“sorghum [ Sorghum bicolor (L.) Moench]”
Claim · model-written summary
Root sodium concentrations were significantly higher than shoot concentrations in controls and NaCl treated plants.
- Outcome
- Sodium concentrations in the rootse0
- Direction
- highere0
- Qualifier
- at all salinity levelse0
- Comparator
- shoot tissuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sodium concentrations in the roots of control and NaCl‐treated plants were significantly higher than in shoot tissues at all salinity levels”
e1“sorghum [ Sorghum bicolor (L.) Moench]”
Claim · model-written summary
At higher Na 2 SO 4 concentrations, shoot sodium rose dramatically.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At higher concentrations of Na 2 SO 4 , this exclusion of Na from the shoot broke down and resulted in a dramatic increase in the Na levels of shoot tissue”
e1“sorghum [ Sorghum bicolor (L.) Moench]”
Claim · model-written summary
At higher Na 2 SO 4 concentrations, shoot potassium and magnesium concentrations fell.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At higher concentrations of Na 2 SO 4 , this exclusion of Na from the shoot broke down and resulted in a dramatic increase in the Na levels of shoot tissue and concurrent decrease in K and Mg concentrations”
e1“sorghum [ Sorghum bicolor (L.) Moench]”
Claim · model-written summary
Seminal roots contained more calcium, magnesium, chloride and sodium than adventitious roots.
- Organ / stage
- Seminal rootse0
- Outcome
- Ca, Mg, Cl, and Nae0
- Direction
- moree0
- Comparator
- adventitious rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seminal roots contained more Ca, Mg, Cl, and Na, while adventitious roots were higher in K”
e1“sorghum [ Sorghum bicolor (L.) Moench]”
Claim · model-written summary
Adventitious roots were higher in potassium than seminal roots.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seminal roots contained more Ca, Mg, Cl, and Na, while adventitious roots were higher in K”
e1“sorghum [ Sorghum bicolor (L.) Moench]”
The same questions in other papers
sodium chloride · growth · SorghumResults differ
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- negative
- positive
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See all 28 papers →sodium sulfate · growth · SorghumResults agree
2 papers in the same direction as this paper
- 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.