CoursolleBigrasMargolisEtAl1998

Reference

Coursolle, C., Bigras, F.J., Margolis, H.A., Hebert, C. (1998) Growth and hardening of four provenances of containerized white spruce (Picea glauca (Moench) Voss) seedlings in response to the duration of 16 h long-night treatments. New Forests, 16(2):155-166.

Abstract

Long-night treatments of 16 h were applied to four provenances of 10-week-old Picea glauca (Moench) Voss seedlings for durations of 0 (control), 4, 8, 12 and 16 d. Their effects on growth and on the development of frost hardiness were determined during the fall. Height growth cessation was hastened by long-night treatments, with 4, 8, 12 and 16 d treatment seedlings ceasing growth approximately 5, 10, 13 and 15 d earlier than control seedlings. The rate of hardening was affected by the duration of the long-night treatment while the level of hardening was affected by both treatment duration and the latitude of origin of the seedlings. Specifically, seedlings receiving the 8, 12 and 16 d treatments had achieved approximately the same level of hardiness by mid-October, which was greater than the 0 and 4 d treatments. However, hardiness levels of the 12 and 16 d treatments were higher in late September than with the 8 d treatment. The level of frost hardiness in late November increased with both increasing duration of long-night treatments (0 to 8 d) and increasing latitude of origin.

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@ARTICLE { CoursolleBigrasMargolisEtAl1998,
    AUTHOR = { Coursolle, C. and Bigras, F.J. and Margolis, H.A. and Hebert, C. },
    TITLE = { Growth and hardening of four provenances of containerized white spruce (Picea glauca (Moench) Voss) seedlings in response to the duration of 16 h long-night treatments },
    JOURNAL = { New Forests },
    YEAR = { 1998 },
    VOLUME = { 16 },
    PAGES = { 155-166 },
    NUMBER = { 2 },
    NOTE = { Times Cited: 3 },
    ABSTRACT = { Long-night treatments of 16 h were applied to four provenances of 10-week-old Picea glauca (Moench) Voss seedlings for durations of 0 (control), 4, 8, 12 and 16 d. Their effects on growth and on the development of frost hardiness were determined during the fall. Height growth cessation was hastened by long-night treatments, with 4, 8, 12 and 16 d treatment seedlings ceasing growth approximately 5, 10, 13 and 15 d earlier than control seedlings. The rate of hardening was affected by the duration of the long-night treatment while the level of hardening was affected by both treatment duration and the latitude of origin of the seedlings. Specifically, seedlings receiving the 8, 12 and 16 d treatments had achieved approximately the same level of hardiness by mid-October, which was greater than the 0 and 4 d treatments. However, hardiness levels of the 12 and 16 d treatments were higher in late September than with the 8 d treatment. The level of frost hardiness in late November increased with both increasing duration of long-night treatments (0 to 8 d) and increasing latitude of origin. },
    KEYWORDS = { dormancy; frost tolerance; nursery production; photoperiod; short days BLACK SPRUCE; DORMANCY },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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