Abstract
Bacillus thuringiensis (Bt) cotton is grown worldwide, including in saline soils, but the effect of salinity on ion fluxes of Bt cotton remains unknown. Responses of two transgenic Bt cotton genotypes (SGK321 and 29317) and their corresponding receptors, Shiyuan 321 (SY321) and Jihe 321 (J321), to 150 mmol L−1 NaCl stress were studied in a growth chamber. The root dry weight of SGK321 and 29317 under NaCl treatment was decreased by 30 and 31%, respectively. However, their corresponding receptor cultivars SY321 and J321 were less affected (19 and 24%, respectively). The root length and surface area of the Bt cultivars were significantly decreased relative to their receptors under salt stress. NaCl treatment significantly increased Cry1Ac mRNA transcript levels in SGK321 and 29317 but did not affect Bt protein content in leaves or roots of either cultivar at 1 and 7 d after NaCl treatment. Fluxes of Na+, K+, and H+ in roots were investigated using the scanning ion-selective electrode technique. Both mean K+ efflux rate and transient K+ efflux of the Bt cultivars increased four-fold compared to their corresponding receptors when exposed to salinity stress. There were no significant differences in Na+ efflux between Bt and non-Bt cottons. Furthermore, the Na+ contents in roots and leaves of all genotypes dramatically increased under salt stress, whereas K+ contents decreased. Our results suggested that Bt cotton cultivars are more sensitive to salt stress than their receptor genotypes.
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Claims 12
Claim · model-written summary
Root dry weight of SGK321 decreased under NaCl treatment by 30%.
- Taxon
- Gossypium hirsutum
Gossypium hirsutumt1 - Material
- SGK321e1
- Treatment
- NaCl treatmente1
- Outcome
- root dry weighte1
- Direction
- decreasede1
- Value
- 30e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The root dry weight of SGK321 and 29317 under NaCl treatment was decreased by 30 and 31%, respectively. However, their corresponding receptor cultivars SY321 and J321 were less affected (19 and 24%, respectively)”
t1“Gossypium hirsutum L.”
Claim · model-written summary
Root dry weight of line 29317 decreased under NaCl treatment by 31%.
- Taxon
- Gossypium hirsutumGossypium hirsutumt1
- Material
- 29317e1
- Treatment
- NaCl treatmente1
- Outcome
- root dry weighte1
- Direction
- decreasede1
- Value
- 31%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The root dry weight of SGK321 and 29317 under NaCl treatment was decreased by 30 and 31%, respectively. However, their corresponding receptor cultivars SY321 and J321 were less affected (19 and 24%, respectively)”
t1“Gossypium hirsutum L.”
Claim · model-written summary
Receptor cultivar SY321 was less affected in root dry weight under NaCl treatment (19%).
- Taxon
- Gossypium hirsutumGossypium hirsutumt1
- Material
- SY321e1
- Treatment
- NaCl treatmente1
- Outcome
- root dry weighte1
- Direction
- less affectede1
- Value
- 19e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The root dry weight of SGK321 and 29317 under NaCl treatment was decreased by 30 and 31%, respectively. However, their corresponding receptor cultivars SY321 and J321 were less affected (19 and 24%, respectively)”
t1“Gossypium hirsutum L.”
Claim · model-written summary
Receptor cultivar J321 was less affected in root dry weight under NaCl treatment (24%).
- Taxon
- Gossypium hirsutumGossypium hirsutumt1
- Material
- J321e1
- Treatment
- NaCl treatmente1
- Outcome
- root dry weighte1
- Direction
- less affectede1
- Value
- 24%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The root dry weight of SGK321 and 29317 under NaCl treatment was decreased by 30 and 31%, respectively. However, their corresponding receptor cultivars SY321 and J321 were less affected (19 and 24%, respectively)”
t1“Gossypium hirsutum L.”
Claim · model-written summary
Root length and surface area of Bt cultivars were significantly decreased relative to their receptors under salt stress.
- Taxon
- Gossypium hirsutumGossypium hirsutumt1
- Material
- Bt cultivarse2
- Treatment
- salt stresse2
- Outcome
- root length and surface areae2
- Direction
- decreasede2
- Comparator
- their receptorse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The root length and surface area of the Bt cultivars were significantly decreased relative to their receptors under salt stress”
t1“Gossypium hirsutum L.”
Claim · model-written summary
NaCl treatment significantly increased Cry1Ac mRNA transcript levels in SGK321 and 29317.
- Taxon
- Gossypium hirsutumGossypium hirsutumt1
- Material
- SGK321 and 29317e3
- Treatment
- NaCl treatmente3
- Gene
- Cry1Ace3
- Outcome
- mRNA transcript levelse3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“NaCl treatment significantly increased Cry1Ac mRNA transcript levels in SGK321 and 29317 but did not affect Bt protein content in leaves or roots of either cultivar at 1 and 7 d after NaCl treatment”
t1“Gossypium hirsutum L.”
Claim · model-written summary
NaCl treatment did not affect Bt protein content in leaves or roots.
- Taxon
- Gossypium hirsutumGossypium hirsutumt1
- Treatment
- NaCl treatmente3
- Outcome
- Bt protein contente3
- Direction
- did not affecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“NaCl treatment significantly increased Cry1Ac mRNA transcript levels in SGK321 and 29317 but did not affect Bt protein content in leaves or roots of either cultivar at 1 and 7 d after NaCl treatment”
t1“Gossypium hirsutum L.”
Claim · model-written summary
Mean K+ efflux rate and transient K+ efflux of Bt cultivars increased four-fold compared with receptors under salinity stress.
- Taxon
- Gossypium hirsutumGossypium hirsutumt1
- Material
- Bt cultivarse4
- Treatment
- salinity stresse4
- Compound
- K+e4
- Outcome
- mean K+ efflux rate and transient K+ effluxe4
- Direction
- increasede4
- Value
- four-folde4
- Comparator
- their corresponding receptorse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Both mean K+ efflux rate and transient K+ efflux of the Bt cultivars increased four-fold compared to their corresponding receptors when exposed to salinity stress”
t1“Gossypium hirsutum L.”
Claim · model-written summary
Na+ efflux did not differ significantly between Bt and non-Bt cottons.
- Taxon
- Gossypium hirsutumGossypium hirsutumt1
- Outcome
- Na+ effluxe5
- Comparator
- non-Bt cottonse5
Not reportedTreatmentDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“There were no significant differences in Na+ efflux between Bt and non-Bt cottons”
t1“Gossypium hirsutum L.”
Claim · model-written summary
Na+ contents in roots and leaves increased under salt stress.
- Taxon
- Gossypium hirsutumGossypium hirsutumt1
- Treatment
- salt stresse6
- Compound
- Na+e6
- Outcome
- Na+ contents in roots and leavese6
- Direction
- increasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Furthermore, the Na+ contents in roots and leaves of all genotypes dramatically increased under salt stress, whereas K+ contents decreased”
t1“Gossypium hirsutum L.”
Claim · model-written summary
K+ contents decreased under salt stress.
- Taxon
- Gossypium hirsutumGossypium hirsutumt1
- Treatment
- salt stresse6
- Compound
- K+e6
- Outcome
- K+ contentse6
- Direction
- decreasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Furthermore, the Na+ contents in roots and leaves of all genotypes dramatically increased under salt stress, whereas K+ contents decreased”
t1“Gossypium hirsutum L.”
Claim · model-written summary
Bt cotton cultivars are more sensitive to salt stress than their receptor genotypes.
- Taxon
- Gossypium hirsutumGossypium hirsutumt1
- Material
- Bt cotton cultivarse7
- Treatment
- salt stresse7
- Outcome
- sensitive to salt stresse7
- Direction
- more sensitivee7
- Comparator
- their receptor genotypese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Our results suggested that Bt cotton cultivars are more sensitive to salt stress than their receptor genotypes”
t1“Gossypium hirsutum L.”
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