膨压丧失点和木质部栓塞抗性：预测植物和生态系统对干旱反应的关键水力特征
The Leaf Turgor Loss Point and Xylem Embolism Resistance: Key Hydraulic Traits for Predicting Plant and Ecosystem Responses to Drought
摘要: 随着全球变暖，干旱事件的频率与强度持续增加，对生态系统的影响日益加剧。叶片膨压丧失点(πₜₗₚ)与木质部栓塞抗性(P50)是评估植物干旱耐受性的两个关键水力性状。近年研究表明，πₜₗₚ与物种分布、水力安全边界、叶经济谱及生态系统对气候变化的响应密切相关，而P50是预测森林衰退与树木死亡的核心指标之一。本文系统综述了πₜₗₚ与P50的生物学意义、决定因素、可塑性及其在预测物种与生态系统干旱响应中的潜力，旨在为全球变化背景下的植物生态学与森林管理提供理论依据。
Abstract: With the global warming, the frequency and intensity of drought events continue to increase, exerting growing impacts on ecosystems. The leaf turgor loss point (πₜₗₚ) and xylem embolism resistance (P50) are key hydraulic traits for assessing plant drought tolerance. Recent studies have shown that πₜₗₚ is closely related to species distribution, hydraulic safety margins, the leaf economics spectrum, and ecosystem responses to climate change, while P50 serves as a core indicator for predicting forest decline and tree mortality. This paper provides a systematic review of the biological significance, determinants, plasticity, and predictive potential of πₜₗₚ and P50 for species- and ecosystem-level drought responses. It aims to offer a theoretical foundation for plant ecology and forest management in the context of global change.
文章引用：王璐. 膨压丧失点和木质部栓塞抗性：预测植物和生态系统对干旱反应的关键水力特征[J]. 林业世界, 2026, 15(2): 400-405. https://doi.org/10.12677/wjf.2026.152049

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