======Xylem dysfunction======
**木部機能不全**

木部の道管、仮道管が通水機能を失うこと。[[e:embolism|エンボリズム]]の他、[[:tylose|チロース]]や樹脂などの代謝産物によって通水が阻害された状態も含む。

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  - Kozlowski TT, Pallardy SG (1997) Physiology of woody plants 2nd ed, 267. Academic Press, San Diego 
  - Tyree MT, Sperry JS (1988) Do woody plants operate near the point of catastrophic xylem dysfunction caused by dynamic water stress? Plant Physiology, 88: 574-580