GroulxLechowicz1987

Référence

Groulx, M., Lechowicz, M.J. (1987) Net photosynthetic recovery in subarctic lichens with contrasting water relations. Oecologia, 71(3):360-368.

Résumé

Rates of net photosynthetic recovery after wetting were related to drying rates under laboratory conditions. In order from most to least rapid recovery, species are Coelocaulon divergens, Cetraria cucullata, Alectoria ochroleuca, Cladina stellaris, Nephroma arcticum and Cladonia sulphurina. In nature the high evaporative resistance or low water-holding capacity characterizing fast-drying species will result in short, frequent cycles of wetting and drying which induce carbon losses. In such situations a rapid photosynthetic recovery should be adaptive since it increases photosynthetic carbon gain during a period of metabolic activity. Fast-drying species probably achieve their rapid photosynthetic recovery by an increased desiccation-tolerance which has a metabolic cost associated with it. In slow-drying species a rapid recovery is not favored by natural selection since these species can take advantage of longer photosynthetic activity periods and are exposed less frequently to deleterious wetting and drying cycles. -from Authors

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@ARTICLE { GroulxLechowicz1987,
    AUTHOR = { Groulx, M. and Lechowicz, M.J. },
    TITLE = { Net photosynthetic recovery in subarctic lichens with contrasting water relations },
    JOURNAL = { Oecologia },
    YEAR = { 1987 },
    VOLUME = { 71 },
    PAGES = { 360-368 },
    NUMBER = { 3 },
    NOTE = { 00298549 (ISSN) Cited By (since 1996): 4 Export Date: 26 April 2007 Source: Scopus Language of Original Document: English },
    ABSTRACT = { Rates of net photosynthetic recovery after wetting were related to drying rates under laboratory conditions. In order from most to least rapid recovery, species are Coelocaulon divergens, Cetraria cucullata, Alectoria ochroleuca, Cladina stellaris, Nephroma arcticum and Cladonia sulphurina. In nature the high evaporative resistance or low water-holding capacity characterizing fast-drying species will result in short, frequent cycles of wetting and drying which induce carbon losses. In such situations a rapid photosynthetic recovery should be adaptive since it increases photosynthetic carbon gain during a period of metabolic activity. Fast-drying species probably achieve their rapid photosynthetic recovery by an increased desiccation-tolerance which has a metabolic cost associated with it. In slow-drying species a rapid recovery is not favored by natural selection since these species can take advantage of longer photosynthetic activity periods and are exposed less frequently to deleterious wetting and drying cycles. -from Authors },
    KEYWORDS = { Alectoria ochroleuca Cetraria cucullata Cladina stellaris Cladonia sulphurina Coelocaulon divergens Nephroma arcticum },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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