CoursolleBigrasMargolis2000

Reference

Coursolle, C., Bigras, F.J. and Margolis, H.A. (2000) Assessment of root freezing damage of two-year-old white spruce, black spruce and jack pine seedlings. Scandinavian Journal of Forest Research, 15(3):343-353.

Abstract

Whole root systems of 2-yr-old containerized white spruce [Picea glauca (Moench) Voss], black spruce [Picea mariana (Mill.) B.S.P.] and jack pine (Pinus banksiana Lamb.) seedlings, with intact root plugs, were exposed to various Frost temperatures, which a preliminary test indicated would induce approximately 0 (control), 20, 40, 60, 80 and nearly 100% frost damage. Damage to root systems was evaluated using: (1) two measures of electrolyte leakage (relative conductivity and total tissue leakage after autoclaving); (2) water loss after pressurization; (3) chlorophyll fluorescence (F-v/F-m, maximal PSII photochemical efficiency) measured 4, 21 and 30 days after the beginning of seedling regrowth and (4) live root dry mass measured 21 days after the artificial frost and 60 days after the beginning of regrowth. Seedling survival and growth after the artificial frost were evaluated using live root dry mass measured after 60 days of regrowth and new shoot length, stem diameter, and root and shoot dry mass. Live root dry mass, dead tissue leakage, jack pine root water loss and fluorescence measurements were all significantly correlated with one or more of the growth variables and the number of significant correlations varied with species. Dead tissue leakage measurements appear to be the most promising method for evaluating root damage to 2-yr-old well-developed root systems of these species.

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@ARTICLE { CoursolleBigrasMargolis2000,
    AUTHOR = { Coursolle, C. and Bigras, F.J. and Margolis, H.A. },
    TITLE = { Assessment of root freezing damage of two-year-old white spruce, black spruce and jack pine seedlings },
    JOURNAL = { Scandinavian Journal of Forest Research },
    YEAR = { 2000 },
    VOLUME = { 15 },
    PAGES = { 343-353 },
    NUMBER = { 3 },
    NOTE = { Times Cited: 5 },
    ABSTRACT = { Whole root systems of 2-yr-old containerized white spruce [Picea glauca (Moench) Voss], black spruce [Picea mariana (Mill.) B.S.P.] and jack pine (Pinus banksiana Lamb.) seedlings, with intact root plugs, were exposed to various Frost temperatures, which a preliminary test indicated would induce approximately 0 (control), 20, 40, 60, 80 and nearly 100% frost damage. Damage to root systems was evaluated using: (1) two measures of electrolyte leakage (relative conductivity and total tissue leakage after autoclaving); (2) water loss after pressurization; (3) chlorophyll fluorescence (F-v/F-m, maximal PSII photochemical efficiency) measured 4, 21 and 30 days after the beginning of seedling regrowth and (4) live root dry mass measured 21 days after the artificial frost and 60 days after the beginning of regrowth. Seedling survival and growth after the artificial frost were evaluated using live root dry mass measured after 60 days of regrowth and new shoot length, stem diameter, and root and shoot dry mass. Live root dry mass, dead tissue leakage, jack pine root water loss and fluorescence measurements were all significantly correlated with one or more of the growth variables and the number of significant correlations varied with species. Dead tissue leakage measurements appear to be the most promising method for evaluating root damage to 2-yr-old well-developed root systems of these species. },
    KEYWORDS = { chlorophyll fluorescence; electrolyte leakage; Picea glauca; Picea mariana; Pinus banksiana; viability tests; water loss DOUGLAS-FIR SEEDLINGS; CHLOROPHYLL FLUORESCENCE; ELECTROLYTE LEAKAGE; VIABILITY TESTS; COLD TOLERANCE; NORWAY SPRUCE; SCOTS PINE; HARDINESS; STORAGE; VITALITY },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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