Abstract
Cotton is a primary agriculture product important for fiber use in textiles and the second major oil seed crop. Cotton is considered as moderately tolerant to salt stress with salinity threshold of 7.7 dS/m at seedling stage. Salinity causes reduction in the growth of seedlings and cotton production that limits fiber quality and cotton yield. In this study, initially, 22 cotton genotypes were screened for relative salt tolerance using germination test in Petri plates (growth chamber). Selected 11 genotypes were further tested in pot experiment (sand) with 0, 15, and 20 dS/m NaCl treatments under glass house conditions. At four-leaves stage, different morphological and physiological traits were measured for all genotypes while biochemical analysis was performed on selected seven highly tolerant and sensitive genotypes. NaCl treatment significantly reduced plant biomass in two genotypes IR-NIBGE-13 and BS-2018, while NIAB-135, NIAB-512, and GH-HADI had least difference in fresh weight between the control and NaCl-treated plants. Photosynthetic rate was maintained in all the genotypes with the exception of SITARA-16. In two sensitive genotypes (IR-NIBGE-13 and 6071/16), Na + ion accumulated more in leaves as compared to K + ion under stress conditions, and an increase in Na + /K + ratio was also observed. The lesser accumulation of malondialdehyde (MDA) content and higher activity of enzymatic antioxidants such as superoxide dismutase (SOD), peroxidase (POD), and ascorbate peroxidase (APX) in stressed plants of NIAB-135, NIAB-512, and FH-152 indicated that these genotypes had adaption capacity for salinity stress in comparison with sensitive genotypes, i.e., IR-NIBGE-13 and 6071/16. The observed salt tolerance was corelated with plant biomass maintenance (morphological), photosynthetic rate, and ionic homeostasis (K + /Na + ratio, physiological) and biochemical stress marker regulations. After a series of experiments, it was concluded that NIAB-135, NIAB-512, and FH-152 could be utilized in breeding programs aimed at improving salinity tolerance in cotton and can expand cotton cultivation in saline area.
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Claims 9
Claim · model-written summary
NaCl significantly reduced biomass in IR-NIBGE-13 and BS-2018.
- Taxon
- Cotton
Gossypium hirsutumt0 - Material
- IR-NIBGE-13 and BS-2018e0
- Treatment
- NaCl treatmente0
- Outcome
- plant biomasse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl treatment significantly reduced plant biomass in two genotypes IR-NIBGE-13 and BS-2018”
t0“Cotton Genotypes”
t1“Cotton Genotypes”
Claim · model-written summary
NIAB-135, NIAB-512 and GH-HADI had the least fresh-weight difference under NaCl.
- Taxon
- CottonGossypium hirsutumt0
- Material
- NIAB-135, NIAB-512, and GH-HADIe0
- Treatment
- NaCl-treatede0
- Outcome
- fresh weighte0
- Direction
- least differencee0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NIAB-135, NIAB-512, and GH-HADI had least difference in fresh weight between the control and NaCl-treated plants”
t0“Cotton Genotypes”
t1“Cotton Genotypes”
Claim · model-written summary
Photosynthetic rate was maintained in all genotypes except SITARA-16.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- Photosynthetic ratee0
- Direction
- maintainede0
- Qualifier
- exception of SITARA-16e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photosynthetic rate was maintained in all the genotypes with the exception of SITARA-16”
t0“Cotton Genotypes”
t1“Cotton Genotypes”
Claim · model-written summary
IR-NIBGE-13 and 6071/16 accumulated more leaf Na+ than K+ under stress.
- Taxon
- CottonGossypium hirsutumt0
- Material
- IR-NIBGE-13 and 6071/16e0
- Outcome
- Na + ion accumulated more in leavese0
- Direction
- moree0
- Comparator
- K + ione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IR-NIBGE-13 and 6071/16), Na + ion accumulated more in leaves as compared to K + ion under stress conditions”
t0“Cotton Genotypes”
t1“Cotton Genotypes”
Claim · model-written summary
Na+/K+ ratio increased in the sensitive genotypes.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- Na + /K + ratioe0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase in Na + /K + ratio was also observed”
t0“Cotton Genotypes”
t1“Cotton Genotypes”
Claim · model-written summary
NIAB-135, NIAB-512 and FH-152 accumulated less MDA under stress than sensitive genotypes.
- Taxon
- CottonGossypium hirsutumt0
- Material
- NIAB-135, NIAB-512, and FH-152e0
- Outcome
- malondialdehyde (MDA) contente0
- Direction
- lessere0
- Comparator
- IR-NIBGE-13 and 6071/16e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lesser accumulation of malondialdehyde (MDA) content and higher activity of enzymatic antioxidants such as superoxide dismutase (SOD), peroxidase (POD), and ascorbate peroxidase (APX) in stressed plants of NIAB-135, NIAB-512, and FH-152 indicated that these genotypes had adaption capacity for salinity stress in comparison with sensitive genotypes, i.e., IR-NIBGE-13 and 6071/16”
t0“Cotton Genotypes”
t1“Cotton Genotypes”
Claim · model-written summary
NIAB-135, NIAB-512 and FH-152 had higher SOD, POD and APX activity under stress.
- Taxon
- CottonGossypium hirsutumt0
- Material
- NIAB-135, NIAB-512, and FH-152e0
- Outcome
- activity of enzymatic antioxidants such as superoxide dismutase (SOD), peroxidase (POD), and ascorbate peroxidase (APX)e0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher activity of enzymatic antioxidants such as superoxide dismutase (SOD), peroxidase (POD), and ascorbate peroxidase (APX) in stressed plants of NIAB-135, NIAB-512, and FH-152”
t0“Cotton Genotypes”
t1“Cotton Genotypes”
Claim · model-written summary
Salt tolerance correlated with maintained biomass, photosynthesis, ionic homeostasis, and biochemical stress markers.
- Taxon
- CottonGossypium hirsutumt0
- Organ / stage
- plante0
- Outcome
- salt tolerancee0
- Qualifier
- plant biomass maintenance (morphological), photosynthetic rate, and ionic homeostasis (K + /Na + ratio, physiological) and biochemical stress marker regulationse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt tolerance was corelated with plant biomass maintenance (morphological), photosynthetic rate, and ionic homeostasis (K + /Na + ratio, physiological) and biochemical stress marker regulations”
t0“Cotton Genotypes”
t1“Cotton Genotypes”
Claim · model-written summary
NIAB-135, NIAB-512 and FH-152 were proposed for breeding salinity tolerance.
- Taxon
- cottonGossypium hirsutume0
- Material
- NIAB-135, NIAB-512, and FH-152e0
- Outcome
- utilized in breeding programs aimed at improving salinity tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NIAB-135, NIAB-512, and FH-152 could be utilized in breeding programs aimed at improving salinity tolerance in cotton”
The same questions in other papers
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