Abstract
A theoretical study is described of the effects of the pattern of partitioning of stored resources between the shoots of a clone on the development of shoot size hierarchy. When there is an increasing convex relationship between the amount of resources available to a shoot at the start of growth and its biomass at maturity, the mode of competition between the shoots is asymmetric and the sharing of stored resources between shoots will not maximize above-ground biomass of the clone at maturity. Under this condition, the plant is predicted to allocate a smaller amount of its resources to storage, producing a lower below/above-ground biomass ratio. Clonal species in which shoots compete asymmetrically are known to have smaller below/above-ground biomass ratios. When there is an increasing concave relationship between the amount of resources available to a shoot at the start of growth and shoot biomass at maturity, the mode of competition will be symmetric, and equal sharing of stored resources between all shoots at the start of growth will maximize the above-ground biomass of the clone at maturity. If sharing of resources is the optimal pattern of partitioning, all shoots of the clone are predicted to be equal in size at maturity and, therefore, a size hierarchy will not develop within a clone. Copyright 2001 Annals of Botany Company
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Claims 7
Claim · model-written summary
A convex resource to shoot biomass relationship produces asymmetric competition.
- Taxon
- a Clonet0
- Organ / stage
- shootse0
- Outcome
- mode of competition between the shoots is asymmetrice0
- Qualifier
- increasing convex relationshipe0
Not reportedDirection
Verbatim
t0“a Clone”
e0“When there is an increasing convex relationship between the amount of resources available to a shoot at the start of growth and its biomass at maturity, the mode of competition between the shoots is asymmetric”
Claim · model-written summary
Under a convex relationship, resource sharing does not maximize mature above-ground biomass.
Verbatim
t0“a Clone”
e0“the sharing of stored resources between shoots will not maximize above-ground biomass of the clone at maturity”
Claim · model-written summary
With asymmetric competition, the plant is predicted to allocate less to storage and have a lower below/above-ground biomass ratio.
Verbatim
e0“Under this condition, the plant is predicted to allocate a smaller amount of its resources to storage, producing a lower below/above-ground biomass ratio”
Claim · model-written summary
Clonal species with asymmetric shoot competition are known to have smaller below/above-ground biomass ratios.
Verbatim
e0“Clonal species in which shoots compete asymmetrically are known to have smaller below/above-ground biomass ratios”
Claim · model-written summary
A concave resource to shoot biomass relationship yields symmetric competition.
- Taxon
- a Clonet0
- Organ / stage
- shoote0
- Outcome
- mode of competition will be symmetrice0
- Qualifier
- increasing concave relationshipe0
Not reportedDirection
Verbatim
t0“a Clone”
e0“When there is an increasing concave relationship between the amount of resources available to a shoot at the start of growth and shoot biomass at maturity, the mode of competition will be symmetric”
Claim · model-written summary
Under a concave relationship, equal sharing maximizes mature above-ground biomass.
Verbatim
t0“a Clone”
e0“equal sharing of stored resources between all shoots at the start of growth will maximize the above-ground biomass of the clone at maturity”
Claim · model-written summary
Optimal resource sharing predicts shoots of equal size at maturity without a size hierarchy.
Not reportedDirection
Verbatim
e0“all shoots of the clone are predicted to be equal in size at maturity and, therefore, a size hierarchy will not develop within a clone”