Abstract
Background and Aims Game theoretical models predict that plants growing in dense stands invest so much biomass in height growth that it trades-off with investment in other organs such as the leaves, leading to decreased plant production. Using the stoloniferous plant Potentilla reptans, we tested the hypothesis that genotypes investing more in the petioles in response to increased density show a greater decrease in total plant mass. We also tested whether a greater increase in mother ramet investment would lead to a greater decrease in investment in vegetative propagation. Methods To uncouple costs and benefits of investments in petioles, ten genotypes that were known to differ in their response to shading signals were grown in monogenotypic stands at two different densities. Key Results Genotypes differed in their increase in petiole investment in response to an increase in density, but not in their decrease in total plant mass or root mass. Total lamina area per plant did not differ significantly between the densities, nor did the mass invested in the laminae per unit of total plant mass. Genotypes differed considerably in the change in vegetation height and petiole investment, but this was not significantly negatively correlated with the change in total plant mass. The genotypes did differ in the change of mass investment in the mother ramet: a greater increase in investment in the mother ramet was correlated to a greater decrease in vegetative propagation. Conclusions While a greater increase in height investment did not lead to a greater decrease in biomass production, it did lead to a decrease in vegetative propagation. This ability to change allocation towards the mother ramets may imply that competition within a stand of stoloniferous plants does not necessarily result in lower total biomass production due to increased height investment.
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Claims 7
Claim · model-written summary
Genotypes differed in density-induced petiole investment.
- Taxon
- Potentilla reptans
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Potentilla reptanst0 - Material
- Genotypese0
- Outcome
- petiole investmente0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Potentilla reptans”
e0“Genotypes differed in their increase in petiole investment in response to an increase in density”
Claim · model-written summary
Genotypes did not differ in density-related decline of total plant mass or root mass.
- Taxon
- Potentilla reptansPotentilla reptanst0
- Material
- Genotypese1
- Outcome
- total plant mass or root masse0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potentilla reptans”
e0“but not in their decrease in total plant mass or root mass”
e1“Genotypes differed in their increase in petiole investment in response to an increase in density”
Claim · model-written summary
Total lamina area per plant did not differ significantly between densities.
- Taxon
- Potentilla reptansPotentilla reptanst0
- Outcome
- Total lamina area per plante0
- Direction
- did not differe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potentilla reptans”
e0“Total lamina area per plant did not differ significantly between the densities”
Claim · model-written summary
Relative lamina mass did not differ significantly between densities.
- Taxon
- Potentilla reptansPotentilla reptanst0
- Outcome
- mass invested in the laminae per unit of total plant masse0
- Direction
- nor dide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potentilla reptans”
e0“nor did the mass invested in the laminae per unit of total plant mass”
Claim · model-written summary
Genotypes differed considerably in changes in vegetation height and petiole investment.
- Taxon
- Potentilla reptansPotentilla reptanst0
- Material
- Genotypese0
- Outcome
- vegetation height and petiole investmente0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potentilla reptans”
e0“Genotypes differed considerably in the change in vegetation height and petiole investment”
Claim · model-written summary
Height and petiole investment changes were not significantly negatively correlated with total mass change.
- Taxon
- Potentilla reptansPotentilla reptanst0
- Organ / stage
- petiolee1
- Outcome
- change in total plant masse0
- Direction
- not significantly negatively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potentilla reptans”
e0“this was not significantly negatively correlated with the change in total plant mass”
e1“Genotypes differed in their increase in petiole investment in response to an increase in density”
Claim · model-written summary
Greater mother ramet investment increase correlated with greater loss of vegetative propagation.
- Taxon
- Potentilla reptansPotentilla reptanst0
- Organ / stage
- mother ramete0
- Outcome
- vegetative propagatione0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potentilla reptans”
e0“a greater increase in investment in the mother ramet was correlated to a greater decrease in vegetative propagation”