Abstract
Five Malaysian rice (Oryza sativa L.) varieties, MR33, MR52, MR211, MR219, and MR232, were tested in pot culture under different salinity regimes for biochemical response, physiological activity, and grain yield. Three different levels of salt stresses, namely, 4, 8, and 12 dS m(-1), were used in a randomized complete block design with four replications under glass house conditions. The results revealed that the chlorophyll content, proline, sugar content, soluble protein, free amino acid, and yield per plant of all the genotypes were influenced by different salinity levels. The chlorophyll content was observed to decrease with salinity level but the proline increased with salinity levels in all varieties. Reducing sugar and total sugar increased up to 8 dS m(-1) and decreased up to 12 dS m(-1). Nonreducing sugar decreased with increasing the salinity levels in all varieties. Soluble protein and free amino acid also decreased with increasing salinity levels. Cortical cells of MR211 and MR232 did not show cell collapse up to 8 dS m(-1) salinity levels compared to susceptible checks (IR20 and BRRI dhan29). Therefore, considering all parameters, MR211 and MR232 showed better salinity tolerance among the tested varieties. Both cluster and principal component analyses depict the similar results.
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Claims 11
Claim · model-written summary
Chlorophyll content decreased with salinity.
- Taxon
- rice
Oryza sativat0 - Treatment
- salinity levele0
- Outcome
- chlorophyll contente0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chlorophyll content was observed to decrease with salinity level”
t0“Rice”
Claim · model-written summary
Proline increased with salinity.
- Taxon
- riceOryza sativat0
- Treatment
- salinity levelse0
- Outcome
- prolinee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the proline increased with salinity levels in all varieties”
t0“Rice”
Claim · model-written summary
Reducing sugar increased to 8 dS m(-1).
- Taxon
- riceOryza sativat0
- Treatment
- 8 dS m(-1)e0
- Outcome
- Reducing sugare0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reducing sugar and total sugar increased up to 8 dS m(-1)”
t0“Rice”
Claim · model-written summary
Total sugar increased to 8 dS m(-1).
- Taxon
- riceOryza sativat0
- Treatment
- 8 dS m(-1)e0
- Outcome
- total sugare0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reducing sugar and total sugar increased up to 8 dS m(-1)”
t0“Rice”
Claim · model-written summary
Reducing sugar declined at 12 dS m(-1).
- Taxon
- riceOryza sativat0
- Treatment
- 12 dS m(-1)e0
- Outcome
- Reducing sugare0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reducing sugar and total sugar increased up to 8 dS m(-1) and decreased up to 12 dS m(-1).”
t0“Rice”
Claim · model-written summary
Total sugar declined at 12 dS m(-1).
- Taxon
- riceOryza sativat0
- Treatment
- 12 dS m(-1)e0
- Outcome
- total sugare0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reducing sugar and total sugar increased up to 8 dS m(-1) and decreased up to 12 dS m(-1).”
t0“Rice”
Claim · model-written summary
Nonreducing sugar fell as salinity rose.
- Taxon
- riceOryza sativat0
- Treatment
- salinity levelse0
- Outcome
- Nonreducing sugare0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nonreducing sugar decreased with increasing the salinity levels in all varieties.”
t0“Rice”
Claim · model-written summary
Soluble protein fell as salinity rose.
- Taxon
- riceOryza sativat0
- Treatment
- salinity levelse0
- Outcome
- Soluble proteine0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soluble protein and free amino acid also decreased with increasing salinity levels.”
t0“Rice”
Claim · model-written summary
Free amino acid fell as salinity rose.
- Taxon
- riceOryza sativat0
- Treatment
- salinity levelse0
- Outcome
- free amino acide0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soluble protein and free amino acid also decreased with increasing salinity levels.”
t0“Rice”
Claim · model-written summary
MR211 and MR232 cortical cells resisted collapse through 8 dS m(-1), unlike checks.
- Taxon
- riceOryza sativat0
- Material
- MR211 and MR232e0
- Treatment
- 8 dS m(-1) salinity levelse0
- Outcome
- cell collapsee0
- Direction
- did not showe0
- Comparator
- IR20 and BRRI dhan29e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cortical cells of MR211 and MR232 did not show cell collapse up to 8 dS m(-1) salinity levels compared to susceptible checks (IR20 and BRRI dhan29).”
t0“Rice”
Claim · model-written summary
MR211 and MR232 had better salinity tolerance among tested varieties.
- Taxon
- riceOryza sativat0
- Material
- MR211 and MR232e0
- Outcome
- salinity tolerancee0
- Comparator
- the tested varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MR211 and MR232 showed better salinity tolerance among the tested varieties.”
t0“Rice”
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