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Physiological Method for Evaluation of Vigor State of Pine Stands

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タイトル: Physiological Method for Evaluation of Vigor State of Pine Stands
著者: Polyakova, Galina G. 著作を一覧する
Polyakov, Vadim I. 著作を一覧する
Pashenova, Natalia V. 著作を一覧する
Stasova, Victoria V. 著作を一覧する
Zubareva, Olga N. 著作を一覧する
Skriopal'shicova, Larisa N. 著作を一覧する
キーワード: Ecological factors
Extractives from Ceratocystis laricicola mycelium
Defense response
Size of necrosis of stem phloem (inner bark)
Vigor state of pine stand
発行日: 2010年 8月
出版者: Hokkaido University Forests, EFRC
誌名: Eurasian Journal of Forest Research
巻: 13
号: 1
開始ページ: 19
終了ページ: 24
抄録: Vigor state of middle-aged pine stands was estimated during 2002-2008 at permanent sample plots by two methods: 1) visual estimation of stand vigor rank according to the 6-point scale of Forest Regulations of RF and 2) method of induction of tree defense response (injection of stem with high molecular extractives from Ceratocystis laricicola mycelium and registration of parameters of stem phloem necrosis). The stands of similar origin and structure were preliminarily divided into background and polluted ones on the basis of different amount of polluting substances in snow cover. Estimation of external tree signs according to 6-point scale didn't reveal significant differences between stands in monitored period. In contrast to this morphological method parameters of specific necrotic response of stem inner bark to fungal extract differed significantly in background and polluted stands. Parameters of the necrotic spots on the phloem were shown to depend on effect of creeping fire. The necrosis size increased and the necrosis "moved" toward crown during two years after the fire. The results are in accordance with the hypothesis that the size of phloem necrosis induced by the effect of extractives from phytopathogenic fungus mycelium on stem vascular tissues was determined by the tree state - it increased in damaged tree and decreased with tree state improvement. The injection method can inform about changes of physiological condition of tree and stand at the latent stage when exterior characteristics of a tree haven't changed yet.
資料タイプ: bulletin (article)


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