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    Effects of sudden exposure to high light levels on two tree fern species Dicksonia antarctica (Dicksoniaceae) and Cyathea australis (Cyatheaceae) acclimated to different light intensities

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    Author
    Volkova, L; Bennett, LT; Tausz, M
    Date
    2009-01-01
    Source Title
    Australian Journal of Botany
    Publisher
    CSIRO PUBLISHING
    University of Melbourne Author/s
    Bennett, Lauren; Tausz, Michael; Volkova, Liubov
    Affiliation
    School of Ecosystem and Forest Sciences
    University General
    Metadata
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    Document Type
    Journal Article
    Citations
    Volkova, L., Bennett, L. T. & Tausz, M. (2009). Effects of sudden exposure to high light levels on two tree fern species Dicksonia antarctica (Dicksoniaceae) and Cyathea australis (Cyatheaceae) acclimated to different light intensities. AUSTRALIAN JOURNAL OF BOTANY, 57 (7), pp.562-571. https://doi.org/10.1071/BT09153.
    Access Status
    This item is currently not available from this repository
    URI
    http://hdl.handle.net/11343/258597
    DOI
    10.1071/BT09153
    Abstract
    We examined the responses of two tree fern species (Dicksonia antarctica and Cyathea australis) growing under shade or variable light (intermittent shade) to sudden exposure to high light levels. Steady-state gas exchange as well as dynamic responses of plants to artificial sunflecks indicated that difference in growth light environment had very little effect on the tree ferns' capacities to utilise and acclimate to prevailing light conditions. Two weeks of exposure to high light levels (short-term acclimation) led to decreases in all photosynthetic parameters and more negative predawn frond water potentials, mostly irrespective of previous growth light environments. After 3months in high light levels (long-term acclimation), D. antarctica fully recovered, while C. australis previously grown under variable light, recovered only partially, suggesting high light level stress effects under the variable light environments for this species.

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