Abstract
Salinity (NaCl) and soil-oxygen-deficiency stresses were applied to tobacco plants, and water uptake by the plants was measured for 10 days. After 10 days Na+ and Cl- concentrations were measured in different plant parts. The plants were irrigated at 8 A.M. or 8 P.M. with or without salinity stress (90 me/l), and were allowed to drain or remain undrained (soil oxygen deficiency). Water uptake was significantly reduced (P = 0.05) by the presence of NaCl in the root zone irrespective of irrigation and drainage treatment. Leaf chloride in all nonsalinized treatments was significantly lower (P = 0.01) than in all salinized treatments. Both day and night waterlogged saline treatment were significantly higher (P = 0.01 and P = 0.05, respectively) than the nonwaterlogged salinized treatment. Thus there was a strong and adverse effect of waterlogging on the uptake of NaCl. The saline treatment that was waterlogged at night was significantly lower (P = 0.05) than the day waterlogged saline treatment. This difference in Cl- concentration between day and night waterlogging treatments was significant only for leaf chloride, although the same trend to higher Cl- content with day waterlogging was present with petioles and stems. Root Cl- concentrations were relatively low irrespective of treatment. Leaf sodium concentrations of day and night waterlogged salinity treatments were significantly higher (P = 0.01) than all other treatments, and the day waterlogged salinized plants were significantly higher (P = 0.05) in leaf Na+ than the night waterlogged salinity treatment. With respect to irrigation management, it is suggested that plants in a soil with some chance of being waterlogged even partially in the root zone and with NaCl present in the root zone would benefit from being irrigated at night rather than during the day.
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Claims 10
Claim · model-written summary
Root-zone NaCl reduced tobacco water uptake irrespective of irrigation and drainage.
- Taxon
- tobacco plants
Nicotiana tabacumt0 - Treatment
- NaCl in the root zonee0
- Outcome
- Water uptakee0
- Direction
- reducede0
- Qualifier
- irrespective of irrigation and drainage treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water uptake was significantly reduced (P = 0.05) by the presence of NaCl in the root zone irrespective of irrigation and drainage treatment”
t0“TOBACCO PLANTS”
Claim · model-written summary
Nonsalinized tobacco had less leaf chloride than salinized tobacco.
- Taxon
- tobacco plantsNicotiana tabacumt0
- Treatment
- nonsalinized treatmentse0
- Outcome
- Leaf chloridee0
- Direction
- lowere0
- Comparator
- salinized treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf chloride in all nonsalinized treatments was significantly lower (P = 0.01) than in all salinized treatments”
t0“TOBACCO PLANTS”
Claim · model-written summary
Daytime waterlogged saline treatment increased leaf chloride over nonwaterlogged saline treatment.
- Taxon
- tobacco plantsNicotiana tabacumt0
- Treatment
- day and night waterlogged saline treatmente0
- Outcome
- Leaf chloridee1
- Direction
- highere0
- Qualifier
- daye0
- Comparator
- nonwaterlogged salinized treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both day and night waterlogged saline treatment were significantly higher (P = 0.01 and P = 0.05, respectively) than the nonwaterlogged salinized treatment”
t0“TOBACCO PLANTS”
e1“Leaf chloride in all nonsalinized treatments was significantly lower (P = 0.01) than in all salinized treatments”
Claim · model-written summary
Nighttime waterlogged saline treatment increased leaf chloride over nonwaterlogged saline treatment.
- Taxon
- tobacco plantsNicotiana tabacumt0
- Treatment
- night waterlogged saline treatmente0
- Outcome
- Leaf chloridee1
- Direction
- highere0
- Comparator
- nonwaterlogged salinized treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both day and night waterlogged saline treatment were significantly higher (P = 0.01 and P = 0.05, respectively) than the nonwaterlogged salinized treatment”
t0“TOBACCO PLANTS”
e1“Leaf chloride in all nonsalinized treatments was significantly lower (P = 0.01) than in all salinized treatments”
Claim · model-written summary
Night waterlogging produced less leaf chloride than day waterlogging under salinity.
- Taxon
- tobacco plantsNicotiana tabacumt0
- Treatment
- waterlogged at nighte0
- Outcome
- leaf chloridee1
- Direction
- lowere0
- Comparator
- day waterlogged saline treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The saline treatment that was waterlogged at night was significantly lower (P = 0.05) than the day waterlogged saline treatment”
t0“TOBACCO PLANTS”
e1“Leaf chloride in all nonsalinized treatments was significantly lower (P = 0.01) than in all salinized treatments”
Claim · model-written summary
Petioles and stems showed a trend toward higher chloride under day rather than night waterlogging.
- Taxon
- tobacco plantsNicotiana tabacumt0
- Organ / stage
- petioles and stemse0
- Treatment
- day waterlogginge0
- Outcome
- Cl- contente0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the same trend to higher Cl- content with day waterlogging was present with petioles and stems”
t0“TOBACCO PLANTS”
Claim · model-written summary
Root chloride concentrations were relatively low regardless of treatment.
- Taxon
- tobacco plantsNicotiana tabacumt0
- Outcome
- Root Cl- concentrationse0
- Direction
- relatively lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root Cl- concentrations were relatively low irrespective of treatment”
t0“TOBACCO PLANTS”
Claim · model-written summary
Day and night waterlogged salinity treatments increased leaf sodium against other treatments.
- Taxon
- tobacco plantsNicotiana tabacumt0
- Treatment
- day and night waterlogged salinity treatmentse0
- Outcome
- Leaf sodium concentrationse0
- Direction
- highere0
- Comparator
- all other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf sodium concentrations of day and night waterlogged salinity treatments were significantly higher (P = 0.01) than all other treatments”
t0“TOBACCO PLANTS”
Claim · model-written summary
Day waterlogging under salinity increased leaf sodium relative to night waterlogging.
- Taxon
- tobacco plantsNicotiana tabacumt0
- Treatment
- day waterlogged salinized plantse0
- Outcome
- leaf Na+e0
- Direction
- highere0
- Comparator
- night waterlogged salinity treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the day waterlogged salinized plants were significantly higher (P = 0.05) in leaf Na+ than the night waterlogged salinity treatment”
t0“TOBACCO PLANTS”
Claim · model-written summary
Night irrigation is suggested for tobacco in soil at risk of partial waterlogging with NaCl in the root zone.
- Taxon
- tobacco plantsNicotiana tabacumt0
- Outcome
- being irrigated at night rather than during the daye0
- Qualifier
- some chance of being waterlogged even partially in the root zone and with NaCl present in the root zonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants in a soil with some chance of being waterlogged even partially in the root zone and with NaCl present in the root zone would benefit from being irrigated at night rather than during the day”
t0“TOBACCO PLANTS”
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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.