GregoireQuiringRoyerEtAl2014

Référence

Grégoire, D. M., Quiring, D. T., Royer, L., Bauce, E. (2014) Relationship between an exotic phloem feeder and balsam fir (Abies balsamea L. (Mill.)) foliar chemistry: implications for two native defoliators. Arthropod-Plant Interactions, 8(4):361-371. (URL )

Résumé

The balsam woolly adelgid (Adelges piceae) is a gout-inducing hemipteran native to the silver fir forests of Europe. Introduced to eastern North America approximately 100 years ago, it is now found in most balsam fir forests in Atlantic Canada. When A. piceae feed, they trigger a reaction in the host branch that alters both xylem and phloem morphology. We conducted a field survey to examine the relationship between A. piceae gout density and balsam fir foliar chemistry and shoot growth in naturally unthinned and precommercially thinned stands. A. piceae gout density negatively affected branch growth and was related to changes in the chemistry of older, but not current-year foliage. Older foliage experienced decreases in camphene and bornyl acetate, while foliar concentrations of camphene, myrcene, phenolics, potassium and water differed between thinned and unthinned stands. Foliar chemistry was also influenced by interactions between thinning and A. piceae gout density in old foliage. This study suggests that changes in balsam fir associated with A. piceae gout density may force native defoliators that feed in highly gouted trees to adapt to diets of different chemical compositions and that thinning may alter these interactions.

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@ARTICLE { GregoireQuiringRoyerEtAl2014,
    AUTHOR = { Grégoire, D. M. and Quiring, D. T. and Royer, L. and Bauce, E. },
    TITLE = { Relationship between an exotic phloem feeder and balsam fir (Abies balsamea L. (Mill.)) foliar chemistry: implications for two native defoliators },
    JOURNAL = { Arthropod-Plant Interactions },
    YEAR = { 2014 },
    VOLUME = { 8 },
    PAGES = { 361-371 },
    NUMBER = { 4 },
    ABSTRACT = { The balsam woolly adelgid (Adelges piceae) is a gout-inducing hemipteran native to the silver fir forests of Europe. Introduced to eastern North America approximately 100 years ago, it is now found in most balsam fir forests in Atlantic Canada. When A. piceae feed, they trigger a reaction in the host branch that alters both xylem and phloem morphology. We conducted a field survey to examine the relationship between A. piceae gout density and balsam fir foliar chemistry and shoot growth in naturally unthinned and precommercially thinned stands. A. piceae gout density negatively affected branch growth and was related to changes in the chemistry of older, but not current-year foliage. Older foliage experienced decreases in camphene and bornyl acetate, while foliar concentrations of camphene, myrcene, phenolics, potassium and water differed between thinned and unthinned stands. Foliar chemistry was also influenced by interactions between thinning and A. piceae gout density in old foliage. This study suggests that changes in balsam fir associated with A. piceae gout density may force native defoliators that feed in highly gouted trees to adapt to diets of different chemical compositions and that thinning may alter these interactions. },
    DOI = { 10.1007/s11829-014-9317-0 },
    ISSN = { 1872-8855 },
    KEYWORDS = { Adelges piceae; Foliar chemistry; Precommercial thinning; Abies balsamea },
    LANGUAGE = { English },
    OWNER = { nafon9 },
    PUBLISHER = { Springer Netherlands },
    TIMESTAMP = { 2014.08.14 },
    URL = { http://dx.doi.org/10.1007/s11829-014-9317-0 },
}

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