摘要
火作为一个基础的生态因子,对森林、草地等陆地生态系统的结构和功能有着重要的影响。种子萌发是种子植物的重要生活史阶段,也是火后植被更新和恢复的主要途径。植被燃烧产生了烟、热以及与烟相关的一系列火烧信号,在打破种子休眠,促进种子萌发方面发挥重要作用。该文将火烧信号分为物理信号和化学信号,物理信号主要是伴随火烧产生的高温,化学信号主要包括气态烟以及近年来从烟水中提取的影响种子萌发的关键化学物质karrikins和glyceronitrile。该文围绕火烧的基本信息,火烧信号对种子萌发的影响,火烧信号在实践中的应用3个方面进行系统综述,重点探讨了不同类别的火烧信号及其交互作用对种子萌发的影响。在系统总结火烧信号对种子萌发影响的研究进展的基础上,提出未来的研究应与烟信号作用机理的探究以及全球变化等方面相结合,旨在充分发挥火的生态服务功能,为火的科学管理应用和退化生态系统恢复提供理论支撑。
Fire is a fundamental ecological factor profoundly affecting many terrestrial ecosystems including forest and grassland ecosystems.Seed germination is an important life-history stage of plants,and it is also the main strategy for the regeneration and restoration of vegetation after fire events.Vegetation combustion produces smoke,heat and a series of fire cues associated with smoke,and plays critical roles in breaking seed dormancy and seedling establishment.In this study,we clustered the fire cues into two categories,i.e.,physical cues(heat)and chemical cues(aerial smoke,karrikins,glyceronitrile)and focused on the basic information of fire,the effects of fire cues on seed germination,and the application of fire cues.In addition,we focused on the effects of different types of fire cues and their interactions on seed germination.Based on a systematic review of the research progress on the effects of fire cues on seed germination,this study also provided suggestions for the future research,such as mechanism of smoke cues on seed germination and seedling growth via molecular technologies,and interaction of smoke cues with climate changes.In summary,based on the review of the ecological functions of fire-related cues on seed germination,this study aims to provide theoretical support for the scientific management of grassland and forest ecosystems and also provide basis for the applications of fire and the restoration of degraded ecosystems.
作者
李绍阳
马红媛
赵丹丹
马梦谣
亓雯雯
LI Shao-Yang;MA Hong-Yuan;ZHAO Dan-Dan;MA Meng-Yao;QI Wen-Wen(Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130102,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shandong Key Laboratory of Eco-Environmental Science for Yellow River Delta,Binzhou University,Binzhou,Shandong 256603,China)
出处
《植物生态学报》
CAS
CSCD
北大核心
2021年第11期1177-1190,共14页
Chinese Journal of Plant Ecology
基金
国家自然科学基金(41977424和41771058)
中国科学院A类战略性先导科技专项(XDA2306040303和XDA28110300)
吉林省自然科学基金(20200201026JC)。
