Abstract
In order to assess the effects of age on flooding tolerance, we conducted a mesocosm flooding experiment that examined biomass accumulation of two age cohorts of Xanthium strumarium L. We also examined repeated measures of stem height and diameter of each cohort for the duration of the experiment. We hypothesized that change in biomass measures (root and shoot biomass, increase in total biomass, and root shoot ratio) of older individuals would be greater than younger individuals under simulated flooded conditions. We further hypothesized that older individuals would be impacted more than younger individuals regarding stress; i.e., the younger cohort would acclimate and thus flooding effects would be masked. Results indicate that older individuals were more impacted by flooding than younger individuals for all biomass parameters. Height repeated measures indicated that older individuals differentially responded to flooding stress, compared to younger individuals; which was also the case for diameter repeated measures. Our study indicates that individuals exposed to flooding at an early age could be plastically developing acclimation structures leading to younger cohorts subsequently outperforming their older cohorts that did not develop under the stressed conditions.
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Claims 4
Claim · model-written summary
Older Xanthium strumarium individuals were more impacted by flooding than younger individuals for all biomass parameters.
- Taxon
- Xanthium strumarium
Xanthium strumariumt0 - Treatment
- floodinge1
- Outcome
- biomass parameterse1
- Direction
- more impactede1
- Comparator
- younger individualse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Xanthium strumariumL.”
e1“older individuals were more impacted by flooding than younger individuals for all biomass parameters”
Claim · model-written summary
Older Xanthium strumarium individuals responded differently to flooding than younger individuals in repeated height measures.
- Taxon
- Xanthium strumariumXanthium strumariumt0
- Treatment
- flooding stresse2
- Outcome
- Height repeated measurese2
- Comparator
- younger individualse2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Xanthium strumariumL.”
e2“Height repeated measures indicated that older individuals differentially responded to flooding stress, compared to younger individuals”
Claim · model-written summary
Older Xanthium strumarium individuals responded differently to flooding than younger individuals in repeated diameter measures.
- Taxon
- Xanthium strumariumXanthium strumariumt0
- Treatment
- flooding stresse2
- Outcome
- diameter repeated measurese3
- Comparator
- younger individualse2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Xanthium strumariumL.”
e2“Height repeated measures indicated that older individuals differentially responded to flooding stress, compared to younger individuals”
e3“which was also the case for diameter repeated measures”
Claim · model-written summary
The authors hypothesise that early flooding exposure leads younger Xanthium strumarium cohorts to outperform older cohorts through plastically developed acclimation structures.
- Taxon
- Xanthium strumariumXanthium strumariumt0
- Outcome
- younger cohorts subsequently outperforming their older cohortse4
- Qualifier
- plastically developing acclimation structurese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Xanthium strumariumL.”
e4“individuals exposed to flooding at an early age could be plastically developing acclimation structures leading to younger cohorts subsequently outperforming their older cohorts”
The same questions in other papers
flooding · growth · Xanthium strumarium (cocklebur)Positive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 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.