Abstract
Abstract The responses of Nicotiana tabacum L. to flooding and to soil treatments consisting of combinations of O 2 , CO 2 ) and N, gases were determined from leaf area and plant height changes and from final root weights. Leaf area and plant height were measured before treatment and after a 5‐day recovery period following treatment; root weights were obtained after the recovery period. The plants were grown in acrylic containers of soil located in an artificially lighted, controlled environment room. Flooding and pure N 2 treatments for 24 hours almost prevented further growth. After 48‐hour treatments with pure N 2 and flooding, roots and shoots were almost dead. Growth of plants treated with 1% O 2 or 1% O 2 + 20% CO 2 was significantly less than that of the control. The 1% O 2 + 20% CO 2 treatment reduced leaf growth significantly more than did 1% O 2 . Although 1% O 2 and 1% O 2 + 20% CO 2 caused injury, plants treated with these gaseous mixtures exhibited near normal growth at the end of a 5‐day recovery period. Permanent injury of tobacco by flooding is primarily due to lack of O 2 in the root zone and not to excess CO 2 . Results obtained in the soil system were similar to those previously obtained in spray nutrient solution culture.
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Claims 7
Claim · model-written summary
Flooding and pure N2 for 24 hours almost prevented further tobacco growth.
- Taxon
- Nicotiana tabacum
Nicotiana tabacume0 - Treatment
- Flooding and pure N 2 treatments for 24 hourse1
- Outcome
- further growthe1
- Direction
- almost preventede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses of Nicotiana tabacum L. to flooding”
e1“Flooding and pure N 2 treatments for 24 hours almost prevented further growth”
Claim · model-written summary
After 48 h, pure N2 and flooding left tobacco roots and shoots almost dead.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- pure N 2 and floodinge2
- Outcome
- roots and shootse2
- Direction
- almost deade2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses of Nicotiana tabacum L. to flooding”
e2“treatments with pure N 2 and flooding, roots and shoots were almost dead”
Claim · model-written summary
Growth of tobacco treated with 1% O2 or 1% O2 + 20% CO2 was significantly less than the control.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- 1% O 2 or 1% O 2 + 20% CO 2e3
- Outcome
- Growthe3
- Direction
- significantly lesse3
- Comparator
- the controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses of Nicotiana tabacum L. to flooding”
e3“Growth of plants treated with 1% O 2 or 1% O 2 + 20% CO 2 was significantly less than that of the control”
Claim · model-written summary
The 1% O2 + 20% CO2 treatment reduced tobacco leaf growth significantly more than 1% O2 alone.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- 1% O 2 + 20% CO 2e4
- Outcome
- leaf growthe4
- Direction
- reducede4
- Comparator
- 1% O 2e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses of Nicotiana tabacum L. to flooding”
e4“The 1% O 2 + 20% CO 2 treatment reduced leaf growth significantly more than did 1% O 2”
Claim · model-written summary
Tobacco plants treated with the gas mixtures showed near normal growth after recovery.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- these gaseous mixturese5
- Outcome
- growthe5
- Direction
- near normale5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses of Nicotiana tabacum L. to flooding”
e5“plants treated with these gaseous mixtures exhibited near normal growth”
Claim · model-written summary
Permanent tobacco injury by flooding is primarily due to lack of O2 in the root zone, not excess CO2.
- Taxon
- tobaccoNicotiana tabacume6
- Treatment
- floodinge6
- Outcome
- Permanent injurye6
- Qualifier
- lack of O 2 in the root zonee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses of Nicotiana tabacum L. to flooding”
e6“Permanent injury of tobacco by flooding is primarily due to lack of O 2 in the root zone and not to excess CO 2”
Claim · model-written summary
Tobacco results in the soil system were similar to those in spray nutrient solution culture.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Outcome
- Results obtained in the soil systeme7
- Direction
- similare7
- Comparator
- spray nutrient solution culturee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses of Nicotiana tabacum L. to flooding”
e7“Results obtained in the soil system were similar to those previously obtained in spray nutrient solution culture”
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See all 18 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.