Abstract
The epiphyte Guzmania monostachia induced CAM activity when transferred to high light intensity (PFD) for 2 weeks under well-watered and water-stressed conditions. Nocturnal acidity resulted from the refixation of respiratory CO 2 ; daytime CO 2 uptake was sensitive to plant water status and was reduced by water stress under high PFD. In contrast, O 2 evolution characteristics were initially reduced by high PFI), with lower apparent quantum yield (AQY), photosynthetic capacity and increased light compensation point. Following the 14 day acclimation period, photosynthetic O 2 evolution recovered, although variable fluorescence (Fv/Fm) exhibited a sustained depression related to photoinhibitory quenching (...)
Keywords
XanthophyllBiologyEpiphytePhotosynthesisAcclimatizationBotanyEcology
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Publication Info
- Year
- 1994
- Type
- article
- Volume
- 8
- Issue
- 6
- Pages
- 746-746
- Citations
- 102
- Access
- Closed
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Cite This
C. Maxwell,
Howard Griffiths,
Andrew Young
(1994).
Photosynthetic Acclimation to Light Regime and Water Stress by the C 3 - CAM Epiphyte Guzmania monostachia: Gas-Exchange Characteristics, Photochemical Efficiency and the Xanthophyll Cycle.
Functional Ecology
, 8
(6)
, 746-746.
https://doi.org/10.2307/2390234
Identifiers
- DOI
- 10.2307/2390234