Abstract
181-187. A number of unexplained responses of plants to CO2 enrichment have been observed. These anomalies can be explained on the basis of growth analysis of whole plants. Some plants may fail to respond to enrichment because they are long-lived and have conservative growth responses or come from impoverished habitats. Apparent (but not real) acclimation to CO2 enrichment might be observed if only part of the growth curve over the life of a perennial is studied. The apparent increased efficiency of nitrogen use may merely be an increase in storage of nonstructural carbohydrate. A model analysis of these effects is presented. Discrepancies among species in relative responses of different plant parts are argued to be largely a function of where the plant typically stores nonstructural carbohydrates, which itself is a function of plant growth stage. Thus, a closer consideration of plant growth strategies and growth partitioning is needed to properly interpret results of CO2 enrichment studies.
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Claims 4
Claim · model-written summary
Long lived or impoverished habitat plants may fail to respond to CO2 enrichment.
- Taxon
- plantsViridiplantaee0
- Outcome
- fail to respond to enrichmente0
- Qualifier
- long-lived and have conservative growth responses or come from impoverished habitatse0
Verbatim
e0“Some plants may fail to respond to enrichment because they are long-lived and have conservative growth responses or come from impoverished habitats”
Claim · model-written summary
Partial observation of a perennial growth curve may produce apparent acclimation to CO2 enrichment.
Verbatim
e0“Apparent (but not real) acclimation to CO2 enrichment might be observed if only part of the growth curve over the life of a perennial is studied”
Claim · model-written summary
Apparent nitrogen use efficiency may reflect increased nonstructural carbohydrate storage.
Not reportedTaxon
Verbatim
e0“The apparent increased efficiency of nitrogen use may merely be an increase in storage of nonstructural carbohydrate”
Claim · model-written summary
Species differences in plant part responses may reflect where nonstructural carbohydrates are stored.
Verbatim
e0“Discrepancies among species in relative responses of different plant parts are argued to be largely a function of where the plant typically stores nonstructural carbohydrates, which itself is a function of plant growth stage”