LubbersLechowicz1989

Référence

Lubbers, A.E., Lechowicz, M.J. (1989) Effects of leaf removal on reproduction vs. belowground storage in Trillium grandiflorum. Ecology, 70(1):85-96.

Résumé

Defoliation was applied during flowering just as the year's flush of leaves matured. Natural pollination limited seed set in one year but not another at the study site near Montreal, Quebec; year-to-year variation in pollinator availability probably is the norm. Removal of leaf or floral bract tissues did not affect mean seed set, but leaf removal did reduce allocation of biomass and nonstructural carbohydrates to rhizomes. As the level of defoliation increased, the correlation between reproduction and storage within plants became increasingly negative. Although the mean seasonal leaf conductance of partially defoliated plants was greater than that of intact plants, any conductance of partially defoliated plants was greater than that of intact plants, any compensatory increases in photosynthesis that may have occurred were apparently insufficient to prevent the reduced allocation to belowground storage. Allocation of resources to current reproduction at the expense of survival and future reproduction possible reflects selective effects of unpredictable availability of pollinators for this woodland spring ephemeral. -from Authors

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@ARTICLE { LubbersLechowicz1989,
    AUTHOR = { Lubbers, A.E. and Lechowicz, M.J. },
    TITLE = { Effects of leaf removal on reproduction vs. belowground storage in Trillium grandiflorum },
    JOURNAL = { Ecology },
    YEAR = { 1989 },
    VOLUME = { 70 },
    PAGES = { 85-96 },
    NUMBER = { 1 },
    NOTE = { 00129658 (ISSN) Cited By (since 1996): 58 Export Date: 26 April 2007 Source: Scopus Language of Original Document: English },
    ABSTRACT = { Defoliation was applied during flowering just as the year's flush of leaves matured. Natural pollination limited seed set in one year but not another at the study site near Montreal, Quebec; year-to-year variation in pollinator availability probably is the norm. Removal of leaf or floral bract tissues did not affect mean seed set, but leaf removal did reduce allocation of biomass and nonstructural carbohydrates to rhizomes. As the level of defoliation increased, the correlation between reproduction and storage within plants became increasingly negative. Although the mean seasonal leaf conductance of partially defoliated plants was greater than that of intact plants, any conductance of partially defoliated plants was greater than that of intact plants, any compensatory increases in photosynthesis that may have occurred were apparently insufficient to prevent the reduced allocation to belowground storage. Allocation of resources to current reproduction at the expense of survival and future reproduction possible reflects selective effects of unpredictable availability of pollinators for this woodland spring ephemeral. -from Authors },
    KEYWORDS = { defoliation resource allocation Canada, Quebec, Montreal Grandiflorum Trillium Trillium grandiflorum },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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