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 in Spartina patens was related to porosity by the reported equation.
- Taxon
- Spartina patens
Sporobolus pumiluse1 - Organ / stage
- Roote0
- Outcome
- porositye0
- Value
- porosity = 1.026 – 0.969 × specific gravitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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).”
e1“roots of Spartina patens”
Claim · model-written summary
Flooded old and new roots declined in specific gravity from 0.78 to 0.58 between days 5 and 25.
- Taxon
- Spartina patensSporobolus pumiluse1
- Organ / stage
- roots (new and old)e0
- Treatment
- floodede0
- Outcome
- specific gravity of flooded rootse0
- Direction
- decreasede0
- Value
- 0.78 to 0.58e0
- Comparator
- old roots that remained drainede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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.”
e1“roots of Spartina patens”
Claim · model-written summary
Specific gravity of old drained roots did not change.
- Taxon
- Spartina patensSporobolus pumiluse1
- Organ / stage
- old rootse0
- Outcome
- specific gravity of old rootse0
- Direction
- did not changee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the specific gravity of old roots that remained drained did not change”
e1“roots of Spartina patens”
Claim · model-written summary
After five days, new roots had less aerenchyma than older roots.
- Taxon
- Spartina patensSporobolus pumiluse1
- Organ / stage
- newly produced rootse0
- Outcome
- aerenchymae0
- Direction
- lesse0
- Qualifier
- After 5 days growthe0
- Comparator
- their older counterpartse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 5 days growth, newly produced roots were found to have less aerenchyma than their older counterparts”
e1“roots of Spartina patens”
Claim · model-written summary
After 25 days, new root specific gravity equaled old root specific gravity.
- Taxon
- Spartina patensSporobolus pumiluse1
- Outcome
- specific gravity of new rootse0
- Direction
- equalede0
- Qualifier
- after 25 dayse0
- Comparator
- old rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after 25 days the specific gravity of new roots equaled that of old roots”
e1“roots of Spartina patens”
Claim · model-written summary
Flooding increased mortality of preexisting roots.
- Taxon
- Spartina patensSporobolus pumiluse1
- Treatment
- floodinge0
- Outcome
- mortality of preexisting rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“flooding increased mortality of preexisting roots”
e1“roots of Spartina patens”
Claim · model-written summary
Flooding inhibited growth of new roots.
- Taxon
- Spartina patensSporobolus pumiluse1
- Treatment
- floodinge0
- Outcome
- growth of new rootse0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“flooding increased mortality of preexisting roots and inhibited growth of new roots”
e1“roots of Spartina patens”
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.