Abstract
Effects of cadmium with different concentrations on the growth and activated oxygen-scavenging system of flue-cured tobacco were studied with water culture experiment.The results showed that the growth of tobacco plant was restrained under the cadmium stress,the shoot biomass and root biomass of tobacco declined with the increasing of cadmium stress intensity and the restraining effect became more evidence under higher Cd levels.Low concentration of Cd(8 mg·kg-1) had a promoting effect on levels of the chlorophyll a,chlorophyll b,chlorophyll a+b,carotenoid and activated oxygen-scavenging system,while high concentration of Cd(16 mg·kg-1) had the opposite effect.The correlation analysis of each physiological index and Cd concentration indicated that the Cd concentration showed significantly negative correlation with the root biomass,and very significantly negative correlation with chlorophyll a,chlorophyll b,chlorophyll a+b,carotenoid,SOD and POD activities,while,the very significantly positive correlation was observed between Cd concentration and the content of MDA.The content of MDA was the most sensitive physiological index affecting the growth of flue-cured tobacco under Cd stress.
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Claims 10
Claim · model-written summary
Cadmium restrained tobacco growth.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- cadmium stresse0
- Outcome
- growthe0
- Direction
- restrainede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the growth of tobacco plant was restrained under the cadmium stress”
Claim · model-written summary
Shoot and root biomass declined as cadmium stress increased.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- cadmium stress intensitye0
- Outcome
- shoot biomass and root biomasse0
- Direction
- declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the shoot biomass and root biomass of tobacco declined with the increasing of cadmium stress intensity”
Claim · model-written summary
Growth inhibition was stronger at higher cadmium levels.
Verbatim
e0“the restraining effect became more evidence under higher Cd levels”
t0“Flue-cured Tobacco”
Claim · model-written summary
Low cadmium promoted chlorophyll and carotenoid levels.
- Taxon
- Flue-cured Tobaccot0
- Treatment
- Cd(8 mg·kg-1)e0
- Outcome
- chlorophyll a,chlorophyll b,chlorophyll a+b,carotenoide0
- Direction
- promotinge0
Not reportedComparator
Verbatim
e0“Low concentration of Cd(8 mg·kg-1) had a promoting effect on levels of the chlorophyll a,chlorophyll b,chlorophyll a+b,carotenoid and activated oxygen-scavenging system”
t0“Flue-cured Tobacco”
Claim · model-written summary
Low cadmium promoted the activated oxygen scavenging system.
- Taxon
- Flue-cured Tobaccot0
- Treatment
- Cd(8 mg·kg-1)e0
- Outcome
- activated oxygen-scavenging systeme0
- Direction
- promotinge0
Not reportedComparator
Verbatim
e0“Low concentration of Cd(8 mg·kg-1) had a promoting effect on levels of the chlorophyll a,chlorophyll b,chlorophyll a+b,carotenoid and activated oxygen-scavenging system”
t0“Flue-cured Tobacco”
Claim · model-written summary
High cadmium had the opposite effect on pigments and oxygen scavenging.
Not reportedComparatorDirection
Verbatim
e0“high concentration of Cd(16 mg·kg-1) had the opposite effect”
t0“Flue-cured Tobacco”
Claim · model-written summary
Cadmium concentration was significantly negatively correlated with root biomass.
Verbatim
e0“Cd concentration showed significantly negative correlation with the root biomass”
t0“Flue-cured Tobacco”
Claim · model-written summary
Cadmium concentration was very significantly negatively correlated with pigments and SOD and POD activities.
- Taxon
- Flue-cured Tobaccot0
- Outcome
- chlorophyll a,chlorophyll b,chlorophyll a+b,carotenoid,SOD and POD activitiese0
- Direction
- negativee0
Not reportedTreatment
Verbatim
e0“very significantly negative correlation with chlorophyll a,chlorophyll b,chlorophyll a+b,carotenoid,SOD and POD activities”
t0“Flue-cured Tobacco”
Claim · model-written summary
Cadmium concentration was very significantly positively correlated with MDA content.
Verbatim
e0“very significantly positive correlation was observed between Cd concentration and the content of MDA”
t0“Flue-cured Tobacco”
Claim · model-written summary
MDA content was the most sensitive physiological index of growth under cadmium stress.
Verbatim
e0“The content of MDA was the most sensitive physiological index affecting the growth of flue-cured tobacco under Cd stress”
The same questions in other papers
cadmium atom · physiology: pigments · Nicotiana tabacum (tobacco)Results differ
1 paper in the same direction as this paper · 9 in the opposite direction
- negative
- negative
- negative
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4 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
2 papers more in this group
See all 6 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.