Abstract
After submerging tobacco seeds(NC89) with different concentrations (0,20%) of PEG solution, seedlings of tetraphyllous phase were treated with temperature ( 5℃) for 1 - 5 days in order to probe into the effects of PEG on some physiological and biochemical characters related to chilling resistance in tobacco seedlings. The results showed that 20 % of PEG not only increased the survival rate of seedlings after chilling stress at 5℃ temperature, but also increased the content of soluble sugar by 95.7 % , and the content of proline by 161.8 % in tobacco seedling leaves. In comparison with the control, the content of chlorophyll and nucleic acid and respiratory rate in seedlings treated with PED all increased significantly under chilling stress. At the same time, activities of superoxide dismutase (SOD) , catalase( CAT) were kept at a high level in tobacco seedlings submerged with PEG than that of control seedlings . The level of malondialdehyde(MDA) in the seedlings and the relative permeability of membrane and the O2- . formation in tobacco seedlings decreased during the chilling stress. The changes of physiological index before and after the chilling stress showed that the index were closely related to the chilling resistance of seedlings. These results suggested that 20% PEG had an effect on stability of membranes and increased the content of protective substance for cold tolerance in tobacco seedlings under chilling stress.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 14
Claim · model-written summary
20 % PEG increased seedling survival after chilling.
- Taxon
- tobacco
Nicotiana tabacumt0 - Treatment
- 20 % of PEGe0
- Outcome
- survival rate of seedlingse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“20 % of PEG not only increased the survival rate of seedlings after chilling stress at 5℃ temperature”
t0“Effects of PEG and Chilling Stress on Some Physiological Characters of Tobacco Seedlings”
Claim · model-written summary
PEG increased soluble sugar content by 95.7 %.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- content of soluble sugare0
- Direction
- increasede0
- Value
- 95.7 %e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the content of soluble sugar by 95.7 %”
t0“Effects of PEG and Chilling Stress on Some Physiological Characters of Tobacco Seedlings”
Claim · model-written summary
PEG increased proline content by 161.8 %.
- Taxon
- tobaccoNicotiana tabacume0
- Organ / stage
- seedling leavese0
- Outcome
- content of prolinee0
- Value
- 161.8 %e0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the content of proline by 161.8 % in tobacco seedling leaves”
Claim · model-written summary
Chlorophyll content increased significantly under chilling after PEG treatment.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- PEDe0
- Outcome
- content of chlorophylle0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In comparison with the control, the content of chlorophyll and nucleic acid and respiratory rate in seedlings treated with PED all increased significantly under chilling stress”
t0“Effects of PEG and Chilling Stress on Some Physiological Characters of Tobacco Seedlings”
Claim · model-written summary
Nucleic acid content increased significantly under chilling after PED treatment.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- PEDe0
- Outcome
- nucleic acide0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In comparison with the control, the content of chlorophyll and nucleic acid and respiratory rate in seedlings treated with PED all increased significantly under chilling stress”
t0“Effects of PEG and Chilling Stress on Some Physiological Characters of Tobacco Seedlings”
Claim · model-written summary
Respiratory rate increased significantly under chilling after PED treatment.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- PEDe0
- Outcome
- respiratory ratee0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In comparison with the control, the content of chlorophyll and nucleic acid and respiratory rate in seedlings treated with PED all increased significantly under chilling stress”
t0“Effects of PEG and Chilling Stress on Some Physiological Characters of Tobacco Seedlings”
Claim · model-written summary
SOD activity stayed high after PEG relative to control.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- PEGe0
- Outcome
- activities of superoxide dismutase (SOD)e0
- Direction
- high levele0
- Comparator
- control seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activities of superoxide dismutase (SOD) , catalase( CAT) were kept at a high level in tobacco seedlings submerged with PEG than that of control seedlings”
Claim · model-written summary
Catalase activity stayed high after PEG relative to control.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- PEGe0
- Outcome
- catalase( CAT)e0
- Direction
- high levele0
- Comparator
- control seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activities of superoxide dismutase (SOD) , catalase( CAT) were kept at a high level in tobacco seedlings submerged with PEG than that of control seedlings”
Claim · model-written summary
Malondialdehyde decreased during chilling.
- Taxon
- tobaccoNicotiana tabacume0
- Outcome
- level of malondialdehyde(MDA)e0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The level of malondialdehyde(MDA) in the seedlings and the relative permeability of membrane and the O2- . formation in tobacco seedlings decreased during the chilling stress”
Claim · model-written summary
Membrane relative permeability decreased during chilling.
- Taxon
- tobaccoNicotiana tabacume0
- Outcome
- relative permeability of membranee0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The level of malondialdehyde(MDA) in the seedlings and the relative permeability of membrane and the O2- . formation in tobacco seedlings decreased during the chilling stress”
Claim · model-written summary
O2- formation decreased during chilling.
- Taxon
- tobaccoNicotiana tabacume0
- Outcome
- O2- . formatione0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The level of malondialdehyde(MDA) in the seedlings and the relative permeability of membrane and the O2- . formation in tobacco seedlings decreased during the chilling stress”
Claim · model-written summary
The physiological indices were related to seedling chilling resistance.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- seedlingse0
- Outcome
- chilling resistance of seedlingse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the index were closely related to the chilling resistance of seedlings”
t0“Effects of PEG and Chilling Stress on Some Physiological Characters of Tobacco Seedlings”
Claim · model-written summary
The authors inferred that PEG stabilized membranes.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- 20% PEGe0
- Outcome
- stability of membranese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“20% PEG had an effect on stability of membranes”
t0“Effects of PEG and Chilling Stress on Some Physiological Characters of Tobacco Seedlings”
Claim · model-written summary
The authors inferred that PEG increased protective substances for cold tolerance.
- Taxon
- tobaccoNicotiana tabacume0
- Outcome
- content of protective substancee0
- Qualifier
- for cold tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the content of protective substance for cold tolerance in tobacco seedlings under chilling stress”
The same questions in other papers
drought · physiology: antioxidant enzymes · Nicotiana tabacum (tobacco)Results differ
5 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
4 papers more in this group
See all 8 papers →drought · survival · Nicotiana tabacum (tobacco)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
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.