Fire and seed dormancy: a global meta-analysis

作者：Zahra Monemizadeh, Asieh Siahmarguee, Elias Soltani, Benjamin Torabi, Carol C. Baskin, Majid Azimmohseni, Juli G. Pausas, Çağatay Tavşanoğlu, Hamid Reza Sadeghipour, Farshid Ghaderi‐Far · 发表于：Annals of Botany · 年份：2024 · DOI：10.1093/aob/mcae229 · 被引用次数：5 · 研究领域：Plant Parasitism and Resistance、Ecology and Vegetation Dynamics Studies、Seed Germination and Physiology

BACKGROUND AND AIMS: Fire-released seed dormancy (SD) is a key trait for successful germination and plant persistence in many fire-prone ecosystems. Many local studies have shown that fire-released SD depends on heat and exposure time, dose of smoke-derived compounds, SD class, plant lineage and the fire regime. However, a global quantitative analysis of fire-released SD is lacking. We hypothesized that fire-released SD is more prevalent in fire-prone than in non-fire-prone ecosystems, and in crown fire compared with surface fire ecosystems. Additionally, we expected to uncover patterns in the relationship between fire cues and SD classes at the global scale that mirror those identified in local or regional studies. METHODS: In total, 246 published germination studies from 1970 to 2022, encompassing 1782 species from 128 families, were used in our meta-analysis. Meta-analysis moderators included different fire cues, smoke application methods, smoke exposure duration and concentration, smoke compounds, fire-proneness, fire regimes and ecosystem types. KEY RESULTS: Heat released physical, and smoke released physiological and morphophysiological dormancies. For SD release, heat and smoke acted synergistically, and karrikinolide (KAR1) was the most effective smoke compound. Fire-released SD was more prevalent in fire-prone than in non-fire-prone regions, particularly under crown fire regimes. Fire-released SD occurred mainly in Mediterranean ecosystems, temperate dry forests and ...