Login | Request Account (DAF staff only)

Photosynthetic characteristics of Flindersia brayleyana and Castanospermum australe from tropical lowland and upland sites

Share this record

Add to FacebookAdd to LinkedinAdd to XAdd to WechatAdd to Microsoft_teamsAdd to WhatsappAdd to Any

Export this record

View Altmetrics

Swanborough, P.W., Doley, D., Keenan, R.J. and Yates, D.J. (1998) Photosynthetic characteristics of Flindersia brayleyana and Castanospermum australe from tropical lowland and upland sites. Tree Physiology, 18 (5). pp. 341-347. ISSN 0829-318X

Full text not currently attached. Access may be available via the Publisher's website or OpenAccess link.

Article Link: https://doi.org/10.1093/treephys/18.5.341

Abstract

Photosynthetic responses to temperature, light and carbon dioxide partial pressure were studied in two-year-old Flindersia brayleyana F. Muell. and Castanospermum australe Cunn. & C. Fraser ex Hook. growing on coastal lowland and upland rainforest sites in tropical Queensland, Australia. Climatic conditions ranged from moist and cool (17–19 °C) to dry and warm (22–24 °C). The optimum temperature for photosynthesis was 23.7–25.6 °C for C. australe and 21.2–24.6 °C for F. brayleyana. Mean maximum rate of electron transport for each species did not differ between sites but was higher (60–62 μmol m−2 s−1) in F. brayleyana than in C. australe (42–44 μmol m−2 s−1). Ribulose-bisphosphate carboxylation rate did not differ significantly between sites or species. Maximum rates of photosynthesis at 1000 μPa Pa−1 CO2 did not differ significantly between sites for each species, but did differ significantly between species. At 350 μPa Pa−1 CO2, photosynthetic light use efficiencies of F. brayleyana and C. australe were 0.05 and 0.015, respectively, at the upland site, and the corresponding values at the lowland site were 0.025 and 0.05. In C. australe, these differences were reflected in significantly greater maximum rates of photosynthesis at 350 μPa Pa−1 CO2 at the lowland site than at the upland site (5.2 versus 3.3 μmol m−2 s−1).

Item Type:Article
Subjects:Science > Botany > Plant physiology
Forestry > Research. Experimentation
Live Archive:18 Mar 2024 00:33
Last Modified:18 Mar 2024 00:33

Repository Staff Only: item control page