HebertThiffaultMunson2011

Reference

Hebert, F., Thiffault, N., Munson, A.D. (2011) Field photosynthesis measurements on black spruce (picea mariana): Does needle age matter? Communications in Soil Science and Plant Analysis, 42(22):2738-2750. (Scopus )

Abstract

Black spruce (Picea mariana) trees have needles that persist for a number of years, and it is not clear which age class should be evaluated for photosynthesis to best understand physiological responses. Moreover, the impact of sampling current versus older foliage is rarely acknowledged in published literature, even though it may influence the interpretation of results. We compared the photosynthesis rate of current and 1-year-old foliage of black spruce natural regeneration during three growing seasons. The photosynthesis rate was consistently greater for 1-year-old needles compared to current-year needles at the beginning of each growing season; however, after about 1 month, rates were similar between the two age classes. This same pattern was repeated every season and was independent of light availability induced by different harvesting treatments. We suggest that photosynthesis measurements of black spruce should be performed on 1-year-old needles instead of current-year foliage to ensure more uniform photosynthesis values throughout the season. © Taylor & Francis Group, LLC.

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@ARTICLE { HebertThiffaultMunson2011,
    AUTHOR = { Hebert, F. and Thiffault, N. and Munson, A.D. },
    TITLE = { Field photosynthesis measurements on black spruce (picea mariana): Does needle age matter? },
    JOURNAL = { Communications in Soil Science and Plant Analysis },
    YEAR = { 2011 },
    VOLUME = { 42 },
    PAGES = { 2738-2750 },
    NUMBER = { 22 },
    ABSTRACT = { Black spruce (Picea mariana) trees have needles that persist for a number of years, and it is not clear which age class should be evaluated for photosynthesis to best understand physiological responses. Moreover, the impact of sampling current versus older foliage is rarely acknowledged in published literature, even though it may influence the interpretation of results. We compared the photosynthesis rate of current and 1-year-old foliage of black spruce natural regeneration during three growing seasons. The photosynthesis rate was consistently greater for 1-year-old needles compared to current-year needles at the beginning of each growing season; however, after about 1 month, rates were similar between the two age classes. This same pattern was repeated every season and was independent of light availability induced by different harvesting treatments. We suggest that photosynthesis measurements of black spruce should be performed on 1-year-old needles instead of current-year foliage to ensure more uniform photosynthesis values throughout the season. © Taylor & Francis Group, LLC. },
    COMMENT = { Export Date: 9 January 2012 Source: Scopus CODEN: CSOSA doi: 10.1080/00103624.2011.622821 },
    ISSN = { 00103624 (ISSN) },
    KEYWORDS = { Black spruce, Foliage, Growth, Needle-age classes, Photosynthesis },
    OWNER = { Luc },
    TIMESTAMP = { 2012.01.09 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-83455246687&partnerID=40&md5=732d6ad3e9973d2c27bd601d492ac961 },
}

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