Abstract
The influence of salinity on the different polyamine fractions (free, conjugated, and bound) was compared in a natrophilic halophyte (Beta vulgaris L. cv. IC) and a salt sensitive glycophyte (Nicotiana rustica L. cv. Basmas). Low-level salinity (25 mM NaCl) and high salinity (150 and 50 mM NaCl for sugar beet and tobacco, respectively) were supplied in hydroponics. Under low salinity shoot dry weight increased in sugar beet, but decreased in tobacco. Under high salinity growth reduction in sugar beet and tobacco were similar. However, sugar beet accumulated higher Na and Cl in roots and shoots than tobacco. Low salinity caused an increase (22%) in the rate of net CO2 assimilation in sugar beet. This parameter was depressed in both species under high salinity. Sugar beet had constitutively higher free spermine levels in roots and shoots than tobacco. Spermidine levels were constitutively higher in shoots of sugar beet and in roots of tobacco. Under salt stress tobacco plants tended to increase free polyamine levels. The most important salt–induced rise in polyamine titer, however, was found in roots and shoots of sugar beet. In sugar beet roots the bound putrescine fraction increased 9.3-fold under growth- stimulating salt supply (25mM) and 20-fold under salt stress (150 mM). In tobacco roots this fraction only increased 2.3 and 3.8-fold under mild (25 mM) and high salt stress (50 mM), respectively. Our results provide support to the view that bound putrescine contributes to the protection against salt stress in the natrophilic sugar beet.
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Claims 17
Claim · model-written summary
Under low salinity, shoot dry weight increased in sugar beet.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarise1 - Treatment
- low salinitye1
- Outcome
- shoot dry weighte1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under low salinity shoot dry weight increased in sugar beet, but decreased in tobacco”
Claim · model-written summary
Under low salinity, shoot dry weight decreased in tobacco.
- Taxon
- tobacco
Nicotiana tabacume1 - Treatment
- low salinitye1
- Outcome
- shoot dry weighte1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under low salinity shoot dry weight increased in sugar beet, but decreased in tobacco”
Claim · model-written summary
Under high salinity, growth reduction was similar in sugar beet and tobacco.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise2
- Treatment
- high salinitye2
- Outcome
- growth reductione2
- Direction
- similare2
- Comparator
- tobaccoe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Under high salinity growth reduction in sugar beet and tobacco were similar”
Claim · model-written summary
Sugar beet accumulated higher Na and Cl in roots and shoots than tobacco.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise3
- Organ / stage
- roots and shootse3
- Outcome
- Na and Cle3
- Direction
- highere3
- Comparator
- tobaccoe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“sugar beet accumulated higher Na and Cl in roots and shoots than tobacco”
Claim · model-written summary
Low salinity increased the rate of net CO2 assimilation by 22% in sugar beet.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise4
- Treatment
- Low salinitye4
- Outcome
- rate of net CO2 assimilatione4
- Direction
- increasee4
- Value
- 22%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Low salinity caused an increase (22%) in the rate of net CO2 assimilation in sugar beet. This parameter was depressed in both species under high salinity”
Claim · model-written summary
High salinity depressed the rate of net CO2 assimilation in sugar beet.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise4
- Treatment
- high salinitye4
- Outcome
- rate of net CO2 assimilatione4
- Direction
- depressede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Low salinity caused an increase (22%) in the rate of net CO2 assimilation in sugar beet. This parameter was depressed in both species under high salinity”
Claim · model-written summary
High salinity depressed the rate of net CO2 assimilation in tobacco.
- Taxon
- Nicotiana rustica
_(Solanaceae)_Plant.JPG?width=60)
Nicotiana rusticae2 - Treatment
- high salinitye4
- Outcome
- rate of net CO2 assimilatione4
- Direction
- depressede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_(Solanaceae)_Plant.JPG?width=500)
Verbatim
e4“Low salinity caused an increase (22%) in the rate of net CO2 assimilation in sugar beet. This parameter was depressed in both species under high salinity”
e2“a salt sensitive glycophyte (Nicotiana rustica L. cv. Basmas)”
Claim · model-written summary
Sugar beet had constitutively higher free spermine levels in roots and shoots than tobacco.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise5
- Organ / stage
- roots and shootse5
- Outcome
- free spermine levelse5
- Direction
- highere5
- Comparator
- tobaccoe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Sugar beet had constitutively higher free spermine levels in roots and shoots than tobacco”
Claim · model-written summary
Spermidine levels were constitutively higher in shoots of sugar beet than in tobacco.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise6
- Organ / stage
- shootse6
- Outcome
- Spermidine levelse6
- Direction
- highere6
- Comparator
- tobaccoe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Spermidine levels were constitutively higher in shoots of sugar beet and in roots of tobacco”
Claim · model-written summary
Spermidine levels were constitutively higher in roots of tobacco than in sugar beet.
- Taxon
- tobaccoNicotiana tabacume6
- Organ / stage
- rootse6
- Outcome
- Spermidine levelse6
- Direction
- highere6
- Comparator
- sugar beete6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Spermidine levels were constitutively higher in shoots of sugar beet and in roots of tobacco”
Claim · model-written summary
Under salt stress tobacco plants tended to increase free polyamine levels.
- Taxon
- tobaccoNicotiana tabacume7
- Treatment
- salt stresse7
- Outcome
- free polyamine levelse7
- Direction
- increasee7
- Qualifier
- tended toe7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Under salt stress tobacco plants tended to increase free polyamine levels”
Claim · model-written summary
The most important salt-induced rise in polyamine titer was in roots and shoots of sugar beet.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise5
- Organ / stage
- roots and shootse5
- Treatment
- salte5
- Outcome
- polyamine titere5
- Direction
- risee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The most important salt–induced rise in polyamine titer, however, was found in roots and shoots of sugar beet”
Claim · model-written summary
In sugar beet roots, bound putrescine increased 9.3-fold under growth-stimulating salt supply (25 mM).
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise5
- Organ / stage
- rootse5
- Treatment
- growth- stimulating salt supply (25mM)e5
- Outcome
- bound putrescine fractione5
- Direction
- increasede5
- Value
- 9.3-folde5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“In sugar beet roots the bound putrescine fraction increased 9.3-fold under growth- stimulating salt supply (25mM) and 20-fold under salt stress (150 mM). In tobacco roots this fraction only increased 2.3 and 3.8-fold under mild (25 mM) and high salt stress (50 mM), respectively”
Claim · model-written summary
In sugar beet roots, bound putrescine increased 20-fold under salt stress (150 mM).
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise5
- Organ / stage
- rootse5
- Treatment
- salt stress (150 mM)e5
- Outcome
- bound putrescine fractione5
- Direction
- increasede5
- Value
- 20-folde5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“In sugar beet roots the bound putrescine fraction increased 9.3-fold under growth- stimulating salt supply (25mM) and 20-fold under salt stress (150 mM). In tobacco roots this fraction only increased 2.3 and 3.8-fold under mild (25 mM) and high salt stress (50 mM), respectively”
Claim · model-written summary
In tobacco roots, bound putrescine increased 2.3-fold under mild salt stress (25 mM).
- Taxon
- tobaccoNicotiana tabacume5
- Organ / stage
- rootse5
- Treatment
- mild (25 mM)e5
- Outcome
- bound putrescine fractione5
- Direction
- increasede5
- Value
- 2.3e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“In sugar beet roots the bound putrescine fraction increased 9.3-fold under growth- stimulating salt supply (25mM) and 20-fold under salt stress (150 mM). In tobacco roots this fraction only increased 2.3 and 3.8-fold under mild (25 mM) and high salt stress (50 mM), respectively”
Claim · model-written summary
In tobacco roots, bound putrescine increased 3.8-fold under high salt stress (50 mM).
- Taxon
- tobaccoNicotiana tabacume5
- Organ / stage
- rootse5
- Treatment
- high salt stress (50 mM)e5
- Outcome
- bound putrescine fractione5
- Direction
- increasede5
- Value
- 3.8-folde5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“In sugar beet roots the bound putrescine fraction increased 9.3-fold under growth- stimulating salt supply (25mM) and 20-fold under salt stress (150 mM). In tobacco roots this fraction only increased 2.3 and 3.8-fold under mild (25 mM) and high salt stress (50 mM), respectively”
Claim · model-written summary
Bound putrescine appears to contribute to protection against salt stress in sugar beet.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise6
- Compound
- bound putrescinee6
- Outcome
- protection against salt stresse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Our results provide support to the view that bound putrescine contributes to the protection against salt stress in the natrophilic sugar beet”
The same questions in other papers
salinity · growth · Beta vulgaris (beet)Results differ
12 papers in the same direction as this paper · 41 in the opposite direction
- positive
- no effect
- no effect
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See all 54 papers →salinity · growth · Nicotiana tabacum (tobacco)Positive and negative results
9 papers in the same direction as this paper · 4 in the opposite direction
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See all 14 papers →salinity · physiology: photosynthesis · Beta vulgaris (beet)Positive and negative results
1 paper in the same direction as this paper · 12 in the opposite direction
- no effect
- no effect
- no effect
10 papers more in this group
See all 14 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.