ElAbidinePlamondon1993

Référence

El Abidine, A.Z., Bernier-Cardou, M. Bernier, P.Y.,, Plamondon, A.P. (1993) Control of pressure chamber and rehydratation time effects on pressure-volume determination of water relation parameters. Canadian Journal of Botany, 71(8):1009-1015.

Résumé

In a study of the seasonal variation of water-relation parameters in four black spruce (Picea ~nariana (Mill) BSP) populations,the weekly derivation of 32 pressure-volume curves with the sap-expression method between May and Octoberrequired the simultaneous use of four pressure chambers and variable sample rehydration periods. Pressure chamber had asignificant effect on three of the five characteristics studied: symplastic water fraction, maximum modulus of elasticity, andosmotic potential at full turgor. These effects were constant over the growing season. On average, rehydration-time effectswere significant for all water-relation parameters except osmotic potential at turgor loss point, but they were not constantover sampling dates. Variations in water-relation parameters due to chambers and rehydration times were controlled and estimatedthrough an experimental design based on the Latin square, which allowed precise comparisons among populationsdespite the increase in variability due to these two factors. The efficiency of the design varied between 110 and 142% relativeto a completely randomized design in which neither chambers nor rehydration times would have been controlled for.

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@ARTICLE { ElAbidinePlamondon1993,
    AUTHOR = { El Abidine, A.Z., Bernier-Cardou, M. Bernier, P.Y., and Plamondon, A.P. },
    TITLE = { Control of pressure chamber and rehydratation time effects on pressure-volume determination of water relation parameters. },
    JOURNAL = { Canadian Journal of Botany },
    YEAR = { 1993 },
    VOLUME = { 71 },
    NUMBER = { 8 },
    PAGES = { 1009-1015 },
    ABSTRACT = { In a study of the seasonal variation of water-relation parameters in four black spruce (Picea ~nariana (Mill) BSP) populations,the weekly derivation of 32 pressure-volume curves with the sap-expression method between May and Octoberrequired the simultaneous use of four pressure chambers and variable sample rehydration periods. Pressure chamber had asignificant effect on three of the five characteristics studied: symplastic water fraction, maximum modulus of elasticity, andosmotic potential at full turgor. These effects were constant over the growing season. On average, rehydration-time effectswere significant for all water-relation parameters except osmotic potential at turgor loss point, but they were not constantover sampling dates. Variations in water-relation parameters due to chambers and rehydration times were controlled and estimatedthrough an experimental design based on the Latin square, which allowed precise comparisons among populationsdespite the increase in variability due to these two factors. The efficiency of the design varied between 110 and 142% relativeto a completely randomized design in which neither chambers nor rehydration times would have been controlled for. },
}

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