Abstract
Biomass production under salt stress decreased with the sequence: IRATOM-24 > BR 9 > Nonabokra > Pokkali. In Pokkali root-shoot dry wt. was less affected and it maintained high root to shoot ratio (R/S) and their tolerance indices (TI). Salinity stress increased Na+, Cl- and decreased K+ and Ca+ contents and consequently their ratios in both root and shoot of the seedlings. Under stress proline level was increased in both root and shoot of the seedlings in all genotypes, the highest was observed in the root of Pokkali and in the shoot of IRATOM-24. Excepting BR 9 salinity increased protein content in other genotypes and among them Nonabokra maintained the highest protein level. Salinity inhibited the root ATPase activity in all except Pokkali. Efficiency of the maintenance of relatively high dry matter, R/S ratio, essential ions, K+ - Ca2+/ Na+ ion ratios, proline and protein contents in the seedlings including the root ATPase activity may be imp ortant aspects of NaCl stress tolerance mechanism as found in one or another rice genotype of the present work. Â Key words: Salinity, Stress tolerance, Proline, Protein, ATPase activity DOI = 10.3329/bjb.v36i2.1510 Bangladesh J. Bot. 36(2): 181-184, 2007 (December)
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Claims 11
Claim · model-written summary
Biomass production under salt stress decreased in the order IRATOM-24, BR 9, Nonabokra, and Pokkali.
- Taxon
- rice genotypes
Oryza sativat0 - Treatment
- salt stresse0
- Outcome
- Biomass productione0
- Direction
- decreasede0
- Qualifier
- IRATOM-24 > BR 9 > Nonabokra > Pokkalie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biomass production under salt stress decreased with the sequence: IRATOM-24 > BR 9 > Nonabokra > Pokkali.”
t0“rice genotypes”
Claim · model-written summary
Pokkali root-shoot dry weight was less affected by salt stress.
- Taxon
- rice genotypesOryza sativat0
- Material
- Pokkalie0
- Outcome
- root-shoot dry wt.e0
- Direction
- less affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In Pokkali root-shoot dry wt. was less affected and it maintained high root to shoot ratio (R/S) and their tolerance indices (TI).”
t0“rice genotypes”
Claim · model-written summary
Pokkali maintained a high root-to-shoot ratio and tolerance indices.
- Taxon
- rice genotypesOryza sativat0
- Material
- Pokkalie0
- Outcome
- root to shoot ratio (R/S) and their tolerance indices (TI)e0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In Pokkali root-shoot dry wt. was less affected and it maintained high root to shoot ratio (R/S) and their tolerance indices (TI).”
t0“rice genotypes”
Claim · model-written summary
Salinity stress increased Na+ and Cl- contents in rice seedling roots and shoots.
- Taxon
- rice genotypesOryza sativat0
- Organ / stage
- root and shoote0
- Treatment
- Salinity stresse0
- Outcome
- Na+, Cl-e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress increased Na+, Cl- and decreased K+ and Ca+ contents and consequently their ratios in both root and shoot of the seedlings.”
t0“rice genotypes”
Claim · model-written summary
Salinity stress decreased K+ and Ca+ contents in rice seedling roots and shoots.
- Taxon
- rice genotypesOryza sativat0
- Organ / stage
- root and shoote0
- Treatment
- Salinity stresse0
- Outcome
- K+ and Ca+ contentse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress increased Na+, Cl- and decreased K+ and Ca+ contents and consequently their ratios in both root and shoot of the seedlings.”
t0“rice genotypes”
Claim · model-written summary
Proline levels increased under stress in rice seedling roots and shoots in all genotypes.
- Taxon
- rice genotypesOryza sativat0
- Organ / stage
- root and shoote0
- Treatment
- stresse0
- Outcome
- proline levele0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under stress proline level was increased in both root and shoot of the seedlings in all genotypes”
t0“rice genotypes”
Claim · model-written summary
Root proline was highest in Pokkali under stress.
- Taxon
- rice genotypesOryza sativat0
- Material
- Pokkalie0
- Organ / stage
- roote0
- Outcome
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest was observed in the root of Pokkali and in the shoot of IRATOM-24.”
t0“rice genotypes”
Claim · model-written summary
Shoot proline was highest in IRATOM-24 under stress.
- Taxon
- rice genotypesOryza sativat0
- Material
- IRATOM-24e0
- Organ / stage
- shoote0
- Outcome
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest was observed in the root of Pokkali and in the shoot of IRATOM-24.”
t0“rice genotypes”
Claim · model-written summary
Salinity increased protein content in rice genotypes other than BR 9.
- Taxon
- rice genotypesOryza sativat0
- Treatment
- salinitye0
- Outcome
- protein contente0
- Direction
- increasede0
- Qualifier
- Excepting BR 9e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excepting BR 9 salinity increased protein content in other genotypes”
t0“rice genotypes”
Claim · model-written summary
Nonabokra maintained the highest protein level among genotypes with increased protein under salinity.
- Taxon
- rice genotypesOryza sativat0
- Material
- Nonabokrae0
- Outcome
- protein levele0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“among them Nonabokra maintained the highest protein level”
t0“rice genotypes”
Claim · model-written summary
Salinity inhibited root ATPase activity in all rice genotypes except Pokkali.
- Taxon
- rice genotypesOryza sativat0
- Treatment
- Salinitye0
- Gene
- ATPasee0
- Outcome
- root ATPase activitye0
- Direction
- inhibitede0
- Qualifier
- except Pokkalie0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity inhibited the root ATPase activity in all except Pokkali.”
t0“rice genotypes”
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