Abstract
The Four levels of sodium chloride induced salinity levels, 0, 6, 9 and 12 dSm-1 were imposed at 25 days after planting of six rice mutants. Results indicated that morphological parameters such as plant height and leaf area, dry mass production in different plant parts such as root, stem, leaf and grain yield hill-1, physiological characters such as biological yield and harvest index, yield attributes such as number of effective tillers hill-1, number of grains panicle-1 and 1000-grain weight, mineral ions in leaves such as potassium and calcium were decreased with gradual increasing of salinity levels while number of non-effective tillers hill-1 and Na content of leaves 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 leaves were found salt tolerant in respect of dry mass production in different plant parts and vice versa. Among the genotypes, the dry matter production and yield loss due to salinity was less in RM250-170 and RM250-2080 than that in the others, which further revealed that RM250-170 and RM250-2080 had a greater tolerance to salinity than RM350-130, RM300- 280, RM250-1080 and IRATOM. The rank of salinity tolerance was: RM250-2080 > RM250-170 > RM250-1080 > IRATOM > RM300-280 > RM350-130.DOI: http://dx.doi.org/10.3329/jesnr.v6i1.22073 J. Environ. Sci. & Natural Resources, 6(1): 239-245 2013
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Claims 10
Claim · model-written summary
Increasing salinity decreased plant height and leaf area.
- Taxon
- Rice
Oryza sativat0 - Treatment
- salinity levelse1
- Outcome
- plant height and leaf areae0
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant height and leaf area”
e1“were decreased with gradual increasing of salinity levels”
t0“Rice Mutants”
Claim · model-written summary
Increasing salinity decreased root, stem, and leaf dry mass.
- Taxon
- RiceOryza sativat0
- Treatment
- salinity levelse1
- Outcome
- dry mass production in different plant parts such as root, stem, leafe0
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry mass production in different plant parts such as root, stem, leaf”
e1“were decreased with gradual increasing of salinity levels”
t0“Rice Mutants”
Claim · model-written summary
Increasing salinity decreased grain yield per hill.
- Taxon
- RiceOryza sativat0
- Treatment
- salinity levelse1
- Outcome
- grain yield hill-1e0
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield hill-1”
e1“were decreased with gradual increasing of salinity levels”
t0“Rice Mutants”
Claim · model-written summary
Increasing salinity decreased biological yield and harvest index.
- Taxon
- RiceOryza sativat0
- Treatment
- salinity levelse1
- Outcome
- biological yield and harvest indexe0
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological yield and harvest index”
e1“were decreased with gradual increasing of salinity levels”
t0“Rice Mutants”
Claim · model-written summary
Increasing salinity decreased effective tillers, grains per panicle, and 1000-grain weight.
- Taxon
- RiceOryza sativat0
- Treatment
- salinity levelse1
- Outcome
- number of effective tillers hill-1, 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 effective tillers hill-1, number of grains panicle-1 and 1000-grain weight”
e1“were decreased with gradual increasing of salinity levels”
t0“Rice Mutants”
Claim · model-written summary
Increasing salinity decreased leaf potassium and calcium.
- Taxon
- RiceOryza sativat0
- Organ / stage
- leavese1
- 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 leaves such as potassium and calcium”
t0“Rice Mutants”
Claim · model-written summary
Increasing soil salinity increased non-effective tillers and leaf Na content.
- Taxon
- RiceOryza sativat0
- Treatment
- soil salinitye0
- Outcome
- number of non-effective tillers hill-1 and Na content of leavese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“number of non-effective tillers hill-1 and Na content of leaves were increased with increasing soil salinity”
t0“Rice Mutants”
Claim · model-written summary
Genotypes excluding leaf Na were salt tolerant for dry mass production.
- Taxon
- RiceOryza sativat0
- Material
- genotypese0
- Outcome
- salt tolerant in respect of dry mass production in different plant partse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotypes having ability to exclude Na from leaves were found salt tolerant in respect of dry mass production in different plant parts and vice versa”
t0“Rice Mutants”
Claim · model-written summary
RM250-170 and RM250-2080 lost less dry matter and yield under salinity than other genotypes.
- Taxon
- RiceOryza sativat0
- Material
- RM250-170 and RM250-2080e0
- Outcome
- dry matter production and yield losse0
- Direction
- lesse0
- Comparator
- the otherse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry matter production and yield loss due to salinity was less in RM250-170 and RM250-2080 than that in the others”
t0“Rice Mutants”
Claim · model-written summary
RM250-2080 ranked highest and RM350-130 lowest in salinity tolerance.
- Taxon
- RiceOryza sativat0
- Material
- RM250-2080e0
- Outcome
- rank of salinity tolerancee0
- Qualifier
- RM250-2080 > RM250-170 > RM250-1080 > IRATOM > RM300-280 > RM350-130e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rank of salinity tolerance was: RM250-2080 > RM250-170 > RM250-1080 > IRATOM > RM300-280 > RM350-130”
t0“Rice Mutants”
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