Effects of Irradiance on Crassulacean Acid Metabolism in the Epiphyte Tillandsia usneoides L. (Bromeliaceae)
Issue Date
1986Author
Martin, Craig E.
Eades, Carol A.
Pitner, Renee A.
Publisher
American Society of Plant Biologists
Type
Article
Article Version
Scholarly/refereed, publisher version
Published Version
http://www.plantphysiol.org/content/80/1/23.full.pdf+htmlMetadata
Show full item recordAbstract
Spanish moss (Tillandsia usneoides L.) was collected in South Carolina,
maintained in a greenhouse, then exposed to five levels of photosynthetic
photon flux density (PPFD) for 3 weeks. Following this treatment,
plants were sampled for chlorophyll concentrations, nocturnal acid accumulations,
and photosynthetic responses to subsequent exposure at a
range of PPFD. No acclimation to PPFD was observed; all plants
exhibited similar patterns of nocturnal C02 uptake and acid accumulation
regardless of initial PPFD treatment. These patterns revealed that at a
PPFD level of approximately 200 micromoles per square meter per
second (daytime integrated PPFD of 10 moles per square meter per day),
CAM saturated or, in low-PPFD plants, was optimal. The results of this
study indicate that adaptation to high PPFD is not necessarily a requirement
of CAM.
Description
This is the publisher's version, also electronically available from: http://www.plantphysiol.org/content/80/1/23.full.pdf+html.
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Citation
Martin, C.E., C.A. Eades, and R.A. Pitner. 1986. Effects of irradiance on Crassulacean acid metabolism in the epiphyte Tillandsia usneoides L. (Bromeliaceae). Plant Physiol. 80: 23-26.
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