Abstract
The effects of NaCl‐induced stress on physiochemical factors such as inorganic cations, proline, malondialdehyde (MDA) and polyamines were investigated in the gramineous weed, Echinochloa crus‐galli Beauv. var. formosensis Ohwi ( E. crus‐galli ) and rice ( Oryza sativa L. cv. Nipponbare). Growth inhibition at the 2nd leaf stage under salt stress was more severe in rice than in E. crus‐galli . Water content in the 2nd leaves was also more severely decreased in rice, indicating that E. crus‐galli was more salt‐tolerant. After NaCl treatment, Na + accumulated in the 2nd leaves of both plant species but not in their roots. Proline accumulation in the 2nd leaves was significantly higher in salt stressed E. crus‐galli than in rice, suggesting the significance of proline production in the salt tolerance of this weed. Content of MDA of the rice increased more greatly with NaCl treatment than that in E. crus‐galli . NaCl treatment affected polyamine metabolism of both plant species, but the response of each plant to salt stress was somewhat different, especially in the leaves. Leaf putrescine and spermidine contents were high in non‐stressed plants in salt‐sensitive rice, although rather lower in E. crus‐galli in response to NaCl concentrations. These results indicate that an increase in proline and changes in polyamines relates to the salt tolerance of E. crus‐galli .
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Claims 9
Claim · model-written summary
Growth inhibition under salt stress was more severe in rice than in E. crus‐galli at the 2nd leaf stage.
- Taxon
- rice
Oryza sativae1 - Organ / stage
- 2nd leaf stagee1
- Treatment
- salt stresse1
- Outcome
- Growth inhibitione1
- Direction
- more severee1
- Comparator
- E. crus‐gallie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Growth inhibition at the 2nd leaf stage under salt stress was more severe in rice than in E. crus‐galli”
Claim · model-written summary
Water content in the 2nd leaves decreased more severely in rice under NaCl-induced stress, indicating E. crus‐galli was more salt-tolerant.
- Taxon
- riceOryza sativae2
- Treatment
- NaCl‐induced stresse3
- Outcome
- Water content in the 2nd leavese2
- Direction
- more severely decreasede2
- Comparator
- E. crus‐gallie2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Water content in the 2nd leaves was also more severely decreased in rice, indicating that E. crus‐galli was more salt‐tolerant”
e3“The effects of NaCl‐induced stress on physiochemical factors”
Claim · model-written summary
Na+ accumulated in the 2nd leaves of rice after NaCl treatment but not in its roots.
- Taxon
- riceOryza sativae0
- Organ / stage
- 2nd leavese1
- Treatment
- NaCl treatmente1
- Outcome
- Na + accumulated in the 2nd leavese1
- Direction
- accumulatede1
- Comparator
- their rootse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice ( Oryza sativa L. cv. Nipponbare)”
e1“After NaCl treatment, Na + accumulated in the 2nd leaves of both plant species but not in their roots”
Claim · model-written summary
Na+ accumulated in the 2nd leaves of E. crus‐galli after NaCl treatment but not in its roots.
Verbatim
e0“Echinochloa crus‐galli Beauv. var. formosensis Ohwi ( E. crus‐galli )”
e1“After NaCl treatment, Na + accumulated in the 2nd leaves of both plant species but not in their roots”
Claim · model-written summary
MDA content in rice increased more greatly with NaCl treatment than in E. crus‐galli.
- Taxon
- riceOryza sativae0
- Treatment
- NaCl treatmente0
- Outcome
- Content of MDAe0
- Direction
- increased more greatlye0
- Comparator
- E. crus‐gallie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Content of MDA of the rice increased more greatly with NaCl treatment than that in E. crus‐galli”
Claim · model-written summary
Proline accumulation in the 2nd leaves was significantly higher in salt-stressed E. crus‐galli than in rice.
Verbatim
e0“Proline accumulation in the 2nd leaves was significantly higher in salt stressed E. crus‐galli than in rice”
Claim · model-written summary
An increase in proline and changes in polyamines relate to the salt tolerance of E. crus‐galli.
Verbatim
e0“an increase in proline and changes in polyamines relates to the salt tolerance of E. crus‐galli”
Claim · model-written summary
Leaf putrescine and spermidine contents were high in non-stressed salt-sensitive rice.
- Taxon
- riceOryza sativae0
- Outcome
- Leaf putrescine and spermidine contentse0
- Qualifier
- high in non‐stressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf putrescine and spermidine contents were high in non‐stressed plants in salt‐sensitive rice”
Claim · model-written summary
Leaf putrescine and spermidine contents were rather lower in E. crus‐galli than in rice in response to NaCl concentrations.
Verbatim
e0“rather lower in E. crus‐galli in response to NaCl concentrations”
e1“Leaf putrescine and spermidine contents were high in non‐stressed plants in salt‐sensitive rice”
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