Abstract
Light-saturated photosynthetic capacities range from 12.0n24.7 mu mol CO2 m-2 s-1 in the Scaevola species and from 18.2-51.4 mu mol CO2 m-2s-1 in the Euphorbia species. Within each genus, differences in light-saturated photosynthetic capacity are paralleled by differences in mesophyll and leaf conductances to CO2. Within each habitat, the C4 Euphorbia species exhibits a significantly higher photosynthetic capacity and a significantly higher mesophyll conductance than the corresponding C3, Scaevola species, differences greatest in the dry scrub habitat and least in the wet forest habitat. One photosynthetic characteristic that exhibits little variation among the species within each genus, yet that exhibits a consistently large difference between the species within each habitat, is photosynthetic water-use efficiency. The C4 Euphorbia species possess water-use efficiencies that are 2-3.5 times as high as those of the C3 Scaevola species. -from Authors
Original language | English (US) |
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Pages (from-to) | 121-129 |
Number of pages | 9 |
Journal | American journal of botany |
Volume | 71 |
Issue number | 1 |
DOIs | |
State | Published - Jan 1 1984 |
Externally published | Yes |
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
- Genetics
- Plant Science