Abstract
The response of twelve rice varieties against six salinity levels (0, 4, 8, 12, 16 and 20 dS m-1) were studied at germination and early seedling stages. Data were analyzed using SAS and means were separated by LSD for final germination percentage (FGP), speed of germination (SG), germination energy percentage (GE%), plumule and radical length and plumule and radical dry weight. Based on dry matter yield reduction, rice varieties were classified as tolerant (T), moderately tolerant (MT), moderately susceptible (MS) or susceptible (S). Germination was completely arrested at 20 dS m-1 salt concentration. Salinity decreased FGP, SG, GE % and led to reduction in shoot and root length and dry weight in all varieties and the magnitude of reduction increased with increasing salinity stress. Rice varieties MR211, IR20, BR40 and MR232 showed greater salt tolerance during germination (germinated at 12 dS m-1 salinity). However, MR211, MR232 and IR20 performed better based on dry matter yield reduction. The result suggested that MR211, MR232 and IR20 might be used for further study of salinity effect on growth processes and physiological consequences at advanced stage of growth, since salt tolerance of a crop at germination and early seedling stage may not correspond to that at advanced stage. Key words: Germination, seedling, rice, salinity stress, NaCl.
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Claims 10
Claim · model-written summary
Germination was fully arrested at 20 dS m-1.
- Taxon
- rice
Oryza sativat0 - Treatment
- 20 dS m-1 salt concentratione0
- Outcome
- Germinatione0
- Direction
- completely arrestede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“Germination was completely arrested at 20 dS m-1 salt concentration”
Claim · model-written summary
Salinity reduced final germination percentage, speed, and energy, with greater reductions at higher stress.
- Taxon
- riceOryza sativat0
- Treatment
- Salinitye0
- Outcome
- FGP, SG, GE %e0
- Direction
- decreasede0
- Qualifier
- magnitude of reduction increased with increasing salinity stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“Salinity decreased FGP, SG, GE % and led to reduction in shoot and root length and dry weight in all varieties and the magnitude of reduction increased with increasing salinity stress”
Claim · model-written summary
Salinity reduced shoot and root length and dry weight across varieties.
- Taxon
- riceOryza sativat0
- Treatment
- Salinitye0
- Outcome
- shoot and root length and dry weighte0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“Salinity decreased FGP, SG, GE % and led to reduction in shoot and root length and dry weight in all varieties”
Claim · model-written summary
MR211 germinated at 12 dS m-1 salinity, showing greater tolerance.
- Taxon
- riceOryza sativat0
- Material
- MR211e0
- Outcome
- greater salt tolerance during germinatione0
- Value
- 12 dS m-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“Rice varieties MR211, IR20, BR40 and MR232 showed greater salt tolerance during germination (germinated at 12 dS m-1 salinity)”
Claim · model-written summary
IR20 germinated at 12 dS m-1 salinity, showing greater tolerance.
- Taxon
- riceOryza sativat0
- Material
- IR20e0
- Outcome
- greater salt tolerance during germinatione0
- Value
- 12 dS m-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“Rice varieties MR211, IR20, BR40 and MR232 showed greater salt tolerance during germination (germinated at 12 dS m-1 salinity)”
Claim · model-written summary
BR40 germinated at 12 dS m-1 salinity, showing greater tolerance.
- Taxon
- riceOryza sativat0
- Material
- BR40e0
- Outcome
- greater salt tolerance during germinatione0
- Value
- 12 dS m-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“Rice varieties MR211, IR20, BR40 and MR232 showed greater salt tolerance during germination (germinated at 12 dS m-1 salinity)”
Claim · model-written summary
MR232 germinated at 12 dS m-1 salinity, showing greater tolerance.
- Taxon
- riceOryza sativat0
- Material
- MR232e0
- Outcome
- greater salt tolerance during germinatione0
- Value
- 12 dS m-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“Rice varieties MR211, IR20, BR40 and MR232 showed greater salt tolerance during germination (germinated at 12 dS m-1 salinity)”
Claim · model-written summary
MR211 performed better based on dry matter yield reduction.
- Taxon
- riceOryza sativat0
- Material
- MR211e0
- Outcome
- dry matter yield reductione0
- Direction
- performed bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“MR211, MR232 and IR20 performed better based on dry matter yield reduction”
Claim · model-written summary
MR232 performed better based on dry matter yield reduction.
- Taxon
- riceOryza sativat0
- Material
- MR232e0
- Outcome
- dry matter yield reductione0
- Direction
- performed bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“MR211, MR232 and IR20 performed better based on dry matter yield reduction”
Claim · model-written summary
IR20 performed better based on dry matter yield reduction.
- Taxon
- riceOryza sativat0
- Material
- IR20e0
- Outcome
- dry matter yield reductione0
- Direction
- performed bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“MR211, MR232 and IR20 performed better based on dry matter yield reduction”
The same questions in other papers
salinity · growth · Oryza sativa (rice)Positive and negative results
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