Abstract
Soil pH is closely related to soil microbial activity, conversion and release of crop nutrient elements, and crop growth.In this study, tobacco was grown in solution culture at varying solution pH levels (solution pHs 4, 5, 6, 7 and 8).Data regarding tobacco growth, dry matter accumulation, activities of membrane-lipid peroxidation and protective enzymes, chlorophyll contents and photosynthetic rate were recorded at 10, 17, 24, 31, 38 and 45 days after transplanting tobacco seedlings.Results showed that growth and physicochemical characteristics of tobacco seedlings were different under varying solutions pH.With increasing solution pH, tobacco root length, volume, surface area, tip number and vitality, the ratio of root dry weight, and malondialdehyde contents increased, whereas the ratio of stem dry weight and superoxide dismutase activity was decreased.Tobacco seedling growth was strongly impaired at pH 4 while solution pH 6-7 seemed superior with respect to tobacco growth.At pH 6, the chlorophyll and photosynthesis rate of tobacco leaves reached at the highest values while pH 8 was beneficial for roots growth.In crux, tobacco growth was inhibited under strong acid and alkaline conditions due to over generation of reactive oxygen species, decreased activity of protective enzymes along with cell membrane damage leading to substantial decline in photosynthesis.Therefore, soils having pH in the range of 6-7 seemed more productive for flue-cured tobacco growth.
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 10
Claim · model-written summary
With increasing solution pH, tobacco root length, volume and surface area increased.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- increasing solution pHe0
- Outcome
- root length, volume, surface areae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing solution pH, tobacco root length, volume, surface area, tip number and vitality, the ratio of root dry weight, and malondialdehyde contents increased, whereas the ratio of stem dry weight and superoxide dismutase activity was decreased”
Claim · model-written summary
With increasing solution pH, tobacco root tip number, root vitality and the ratio of root dry weight increased.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- increasing solution pHe0
- Outcome
- tip number and vitality, the ratio of root dry weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing solution pH, tobacco root length, volume, surface area, tip number and vitality, the ratio of root dry weight, and malondialdehyde contents increased, whereas the ratio of stem dry weight and superoxide dismutase activity was decreased”
Claim · model-written summary
With increasing solution pH, malondialdehyde contents of tobacco increased.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- increasing solution pHe0
- Outcome
- malondialdehyde contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing solution pH, tobacco root length, volume, surface area, tip number and vitality, the ratio of root dry weight, and malondialdehyde contents increased, whereas the ratio of stem dry weight and superoxide dismutase activity was decreased”
Claim · model-written summary
With increasing solution pH, the ratio of stem dry weight and superoxide dismutase activity of tobacco decreased.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- increasing solution pHe0
- Outcome
- the ratio of stem dry weight and superoxide dismutase activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing solution pH, tobacco root length, volume, surface area, tip number and vitality, the ratio of root dry weight, and malondialdehyde contents increased, whereas the ratio of stem dry weight and superoxide dismutase activity was decreased”
Claim · model-written summary
Tobacco seedling growth was strongly impaired at pH 4.
- Taxon
- TobaccoNicotiana tabacume1
- Treatment
- pH 4e1
- Outcome
- seedling growthe1
- Direction
- impairede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tobacco seedling growth was strongly impaired at pH 4”
Claim · model-written summary
Solution pH 6-7 seemed superior for tobacco growth.
- Taxon
- tobaccoNicotiana tabacume2
- Treatment
- solution pH 6-7e2
- Outcome
- tobacco growthe2
- Direction
- superiore2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“solution pH 6-7 seemed superior with respect to tobacco growth”
Claim · model-written summary
At pH 6, chlorophyll and photosynthesis rate of tobacco leaves reached their highest values.
- Taxon
- tobaccoNicotiana tabacume3
- Organ / stage
- leavese3
- Treatment
- pH 6e3
- Outcome
- chlorophyll and photosynthesis ratee3
- Direction
- highest valuese3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“At pH 6, the chlorophyll and photosynthesis rate of tobacco leaves reached at the highest values”
Claim · model-written summary
Solution pH 8 was beneficial for root growth of flue-cured tobacco.
Not reportedComparator
Verbatim
e4“pH 8 was beneficial for roots growth”
t0“Flue-Cured Tobacco”
Claim · model-written summary
The authors attribute inhibited tobacco growth under strong acid and alkaline conditions to excess reactive oxygen species, reduced protective enzyme activity and membrane damage that lower photosynthesis.
- Taxon
- tobaccoNicotiana tabacume5
- Treatment
- strong acid and alkaline conditionse5
- Outcome
- tobacco growth was inhibitede5
- Qualifier
- over generation of reactive oxygen species, decreased activity of protective enzymes along with cell membrane damage leading to substantial decline in photosynthesise5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“tobacco growth was inhibited under strong acid and alkaline conditions due to over generation of reactive oxygen species, decreased activity of protective enzymes along with cell membrane damage leading to substantial decline in photosynthesis”
Claim · model-written summary
Soils with pH in the range of 6-7 are recommended as more productive for flue-cured tobacco growth.
Verbatim
e6“soils having pH in the range of 6-7 seemed more productive for flue-cured tobacco growth”
The same questions in other papers
ph · growth · Nicotiana tabacum (tobacco)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- no effect
- 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.