Abstract
Root aerenchyma, developed in response to flooding, was measured as specific gravity in previously existing (old) and newly developed (new) roots of Spartina patens in a 25-day greenhouse experiment. Root specific gravity was related to porosity (fractional volume of aerenchyma): porosity = 1.026 – 0.969 × specific gravity, over a wide range of specific gravities (0.5 to 0.9). The specific gravity of flooded roots (new and old) decreased from 0.78 to 0.58 between day 5 and 25, while the specific gravity of old roots that remained drained did not change. After 5 days growth, newly produced roots were found to have less aerenchyma than their older counterparts, but after 25 days the specific gravity of new roots equaled that of old roots. In addition, flooding increased mortality of preexisting roots and inhibited growth of new roots.
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Claims 7
Claim · model-written summary
Root specific gravity was related to porosity, with porosity = 1.026 – 0.969 × specific gravity.
- Taxon
- Spartina patens
Sporobolus pumiluse0 - Organ / stage
- Roote1
- Outcome
- porositye1
- Value
- porosity = 1.026 – 0.969 × specific gravitye2
- Qualifier
- over a wide range of specific gravities (0.5 to 0.9)e2
- Setting
- greenhouse experimente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of Spartina patens in a 25-day greenhouse experiment”
e1“Root specific gravity was related to porosity”
e2“porosity = 1.026 – 0.969 × specific gravity, over a wide range of specific gravities (0.5 to 0.9)”
Claim · model-written summary
Flooding decreased the specific gravity of new and old roots from 0.78 to 0.58 between day 5 and 25.
- Taxon
- Spartina patensSporobolus pumiluse0
- Organ / stage
- roots (new and old)e3
- Treatment
- floodede3
- Outcome
- specific gravitye3
- Direction
- decreasede3
- Value
- from 0.78 to 0.58e3
- Comparator
- day 5e3
- Setting
- greenhouse experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of Spartina patens in a 25-day greenhouse experiment”
e3“The specific gravity of flooded roots (new and old) decreased from 0.78 to 0.58 between day 5 and 25”
Claim · model-written summary
Old roots that remained drained kept their specific gravity unchanged, unlike flooded roots.
- Taxon
- Spartina patensSporobolus pumiluse0
- Organ / stage
- old rootse7
- Treatment
- remained drainede7
- Outcome
- specific gravitye7
- Direction
- did not changee7
- Comparator
- flooded roots (new and old)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of Spartina patens in a 25-day greenhouse experiment”
e3“The specific gravity of flooded roots (new and old) decreased from 0.78 to 0.58 between day 5 and 25”
e7“the specific gravity of old roots that remained drained did not change”
Claim · model-written summary
New roots after 5 days had less aerenchyma than their older counterparts.
- Taxon
- Spartina patensSporobolus pumiluse0
- Organ / stage
- newly produced rootse4
- Outcome
- aerenchymae4
- Direction
- lesse4
- Qualifier
- After 5 days growthe4
- Comparator
- their older counterpartse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of Spartina patens in a 25-day greenhouse experiment”
e4“After 5 days growth, newly produced roots were found to have less aerenchyma than their older counterparts”
Claim · model-written summary
After 25 days the specific gravity of new roots equaled that of old roots.
- Taxon
- Spartina patensSporobolus pumiluse0
- Organ / stage
- new rootse5
- Outcome
- specific gravitye5
- Direction
- equalede5
- Qualifier
- after 25 dayse5
- Comparator
- old rootse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of Spartina patens in a 25-day greenhouse experiment”
e5“after 25 days the specific gravity of new roots equaled that of old roots”
Claim · model-written summary
Flooding increased mortality of preexisting roots.
- Taxon
- Spartina patensSporobolus pumiluse0
- Organ / stage
- preexisting rootse6
- Treatment
- floodinge6
- Outcome
- mortality of preexisting rootse6
- Direction
- increasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of Spartina patens in a 25-day greenhouse experiment”
e6“flooding increased mortality of preexisting roots”
Claim · model-written summary
Flooding inhibited growth of new roots.
- Taxon
- Spartina patensSporobolus pumiluse0
- Treatment
- floodinge7
- Outcome
- growth of new rootse7
- Direction
- inhibitede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of Spartina patens in a 25-day greenhouse experiment”
e7“flooding increased mortality of preexisting roots and inhibited growth of new roots”
The same questions in other papers
flooding · pest · Sporobolus pumilusResults agree
1 paper in the same direction as this paper
- negative
flooding · growth · Sporobolus pumilusResults agree
2 papers in the same direction as this paper
- negative
- negative
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.