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 and Satureja douglasii_files/title.gif){kind=small}  and Satureja douglasii_files/912546920.gif){kind=small}
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 and Satureja douglasii_files/rarrowsm.gif){kind=small} Download ALL Selected
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 and Satureja douglasii_files/down.gif)
Wendy A. Peer, Winslow R. Briggs, and Jean H. Langenheim
 and Satureja douglasii_files/back.gif)
(American Journal of Botany.
1999;86:640-645.)Department of Biology, University of California, Santa Cruz, California 95064
Shade-avoidance responses were examined for two species common to the coastal redwood forest, Sequoia sempervirens and Satureja douglasii. Sequoia seedlings demonstrated a shade-avoidance response when given end-of-day far-red light by increased hypocotyl, epicotyl, and first-node extension, and greater total number of needles and reduced anthocyanin concentration. Thus, Sequoia seedlings respond as sun-adapted plants. Satureja has several leaf monoterpene chemotypes that occur in different light environments including the redwood forest, and the types responded differently to the light treatments. The pulegone type responded to end-of-day far-red light as a sun-adapted plant with significant extension growth, increased leaf area and chlorophyll, and reduced anthocyanin. The isomenthone type responded as a shade-tolerant plant and did not exhibit extension growth nor a change in other parameters with end-of-day far-red light. However, the carvone and bicyclic types had variable responses depending on the parameter studied, which indicated genetic variation for these traits.
Key Words: end-of-day far-red light • Lamiaceae • phytochrome • Satureja • Sequoia • shade avoidance • Taxodiaceae
[Full Text of Peer et al.] [Reprint (PDF) Version of Peer et al.]
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