Abstract
The pot experiment was conducted at the glasshouse of University Putra Malaysia, Serdang, Selangor, Malaysia, during July to November 2012 to investigate the effect of different salinity levels on morpho-physiological characters, yield attributes and yield in five saline tolerant rice genotypes viz., SAL656, SAL614, SAL730, SAL613 and Pokkali. The four levels of sodium chloride induced salinity levels, 0, 6, 9 and 12 dSm-1, were imposedat 25 days after planting. Results indicated that morpho-physiological characters such as plant height, tiller number, leaf number, root volume and weight, straw yield, harvest index, chlorophyll content, photosynthesis and stomatal conductance in leaves, yield attributes such as number of grains panicle-1 and 1000-grain weight, mineral ions in shoots, such as potassium and calcium, were decreased with gradual increasing of salinity levels while grain sterility and Na+ content of shoot were increased with increasing soil salinity. The highest value of the above parameters was observed in control and the lowest values of them were observed at 12 dSm-1. Generally genotypes having ability to exclude Na from shoot were found salt tolerant in respect of grain yield and vice versa. Among the genotypes, the yield loss due to salinity was less in SAL656 and Pokkali than that in the others, which further revealed that SAL656 and Pokkali had a greater tolerance to salinity than SAL614, SAL760 and SAL613. The rank of salinity tolerance was: PB SAL656 > Pokkali > PB SAL730 > PB SAL613 > PB SAL614.
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Claims 10
Claim · model-written summary
Increasing salinity decreased rice growth and yield traits.
- Taxon
- rice
Oryza sativat0 - Treatment
- salinity levelse1
- Outcome
- plant height, tiller number, leaf number, root volume and weight, straw yield, harvest indexe0
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant height, tiller number, leaf number, root volume and weight, straw yield, harvest index”
e1“were decreased with gradual increasing of salinity levels”
t0“rice genotypes”
Claim · model-written summary
Increasing salinity decreased photosynthetic traits in rice.
- Taxon
- riceOryza sativat0
- Treatment
- salinity levelse1
- Outcome
- chlorophyll content, photosynthesis and stomatal conductance in leavese0
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll content, photosynthesis and stomatal conductance in leaves”
e1“were decreased with gradual increasing of salinity levels”
t0“rice genotypes”
Claim · model-written summary
Increasing salinity decreased rice grain number and weight.
- Taxon
- riceOryza sativat0
- Treatment
- salinity levelse1
- Outcome
- number of grains panicle-1 and 1000-grain weighte0
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“number of grains panicle-1 and 1000-grain weight”
e1“were decreased with gradual increasing of salinity levels”
t0“rice genotypes”
Claim · model-written summary
Increasing salinity decreased shoot potassium and calcium in rice.
- Taxon
- riceOryza sativat0
- Organ / stage
- shootse1
- Treatment
- salinity levelse0
- Outcome
- potassium and calciume0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potassium and calcium, were decreased with gradual increasing of salinity levels”
e1“mineral ions in shoots”
t0“rice genotypes”
Claim · model-written summary
Increasing soil salinity increased rice grain sterility.
- Taxon
- riceOryza sativat0
- Treatment
- soil salinitye0
- Outcome
- grain sterilitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain sterility and Na+ content of shoot were increased with increasing soil salinity”
t0“rice genotypes”
Claim · model-written summary
Increasing soil salinity increased shoot Na+ content in rice.
- Taxon
- riceOryza sativat0
- Treatment
- soil salinitye0
- Outcome
- Na+ content of shoote0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain sterility and Na+ content of shoot were increased with increasing soil salinity”
t0“rice genotypes”
Claim · model-written summary
Rice genotypes excluding Na from shoots were more salt tolerant by grain yield.
- Taxon
- riceOryza sativat0
- Material
- genotypese0
- Outcome
- salt tolerant in respect of grain yielde0
- Direction
- salt tolerante0
- Qualifier
- ability to exclude Na from shoote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotypes having ability to exclude Na from shoot were found salt tolerant in respect of grain yield”
t0“rice genotypes”
Claim · model-written summary
SAL656 had less salinity yield loss than other genotypes.
- Taxon
- riceOryza sativat0
- Material
- SAL656e0
- Outcome
- yield loss due to salinitye0
- Direction
- lesse0
- Comparator
- the otherse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield loss due to salinity was less in SAL656 and Pokkali than that in the others”
t0“rice genotypes”
Claim · model-written summary
Pokkali had less salinity yield loss than other genotypes.
- Taxon
- riceOryza sativat0
- Material
- Pokkalie0
- Outcome
- yield loss due to salinitye0
- Direction
- lesse0
- Comparator
- the otherse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield loss due to salinity was less in SAL656 and Pokkali than that in the others”
t0“rice genotypes”
Claim · model-written summary
Rice genotypes ranked SAL656, Pokkali, SAL730, SAL613 and SAL614 in descending salinity tolerance.
- Taxon
- riceOryza sativat0
- Outcome
- rank of salinity tolerancee0
- Qualifier
- PB SAL656 > Pokkali > PB SAL730 > PB SAL613 > PB SAL614e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rank of salinity tolerance was: PB SAL656 > Pokkali > PB SAL730 > PB SAL613 > PB SAL614.”
t0“rice genotypes”
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