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Plant Defense Characteristics and Hypotheses in Birch Species

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Title: Plant Defense Characteristics and Hypotheses in Birch Species
Authors: Novriyanti, Eka Browse this author
Aoyama, Chiho Browse this author
Watanabe, Makoto Browse this author →KAKEN DB
Koike, Takayoshi Browse this author →KAKEN DB
Keywords: Birch (Betula)
chemical defense
physical defense
trade-off relation
proposed defense models
Issue Date: Dec-2010
Publisher: Hokkaido University Forests, EFRC
Journal Title: Eurasian Journal of Forest Research
Volume: 13
Issue: 2
Start Page: 77
End Page: 85
Abstract: Birches employ defense when under pressure, either biotic or abiotic or both. They have at least three types of defense against herbivores, involving physical, chemical and phenological strategies, whether the defense is constitutive or induced. Leaves usually use both types of defense, whereas woody parts (stems, branches, or twigs) deploy mostly chemical defense. Other studies scarcely differentiate between proposed plant defense models such as CNBH and GDBH, and the defensive responses of birches, since there is a large variation in defensive responses. The evidence supports neither the carbon-nutrient balance (CNB) nor the growth-differentiation balance (GDB) hypothesis in birch defense, indicating that defense is genetically regulated. In our review, we may conclude that birches deploy their various defenses in parallel, since these derive from distinct chemical and physical mechanisms.
Type: bulletin (article)
Appears in Collections:Eurasian journal of forest research > Vol.13-2

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