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The Impact of Post-Fire Smoke on Plant Communities: A Global Approach

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PLANTS-BASEL
卷 12, 期 22, 页码 -

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MDPI
DOI: 10.3390/plants12223835

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plant butenolides; karrikins; seed germination; plant ecology; crop physiology; plant development; swailing; vegetation restoration

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Smoke plays a significant role in altering vegetation communities by promoting or excluding different plant species. Research on smoke-derived compounds has primarily focused on fire-prone areas, but has expanded to regions with moderate climates. This review provides updated information on the effects of smoke compounds on plant kingdoms in different regions, with a particular emphasis on the physiological effects of smoke chemicals and their role in plant adaptation and response to environmental changes.
Smoke is one of the fire-related cues that can alter vegetation communities' compositions, by promoting or excluding different plant species. For over 30 years, smoke-derived compounds have been a hot topic in plant and crop physiology. Research in this field was initiated in fire-prone areas in Australia, South Africa and some countries of both Americas, mostly with Mediterranean-type climates. Then, research extended to regions with moderate climates, like Central European countries; this was sometimes determined by the fact that in those regions, extensive prescribed or illegal burning (swailing) occurs. Hence, this review updates information about the effects of smoke compounds on plant kingdoms in different regions. It also focuses on research advances in the field of the physiological effects of smoke chemicals, mostly karrikins, and attempts to gather and summarize the current state of research and opinions on the roles of such compounds in plants' lives. We finish our review by discussing major research gaps, which include issues such as why plants that occur in non-fire-prone areas respond to smoke chemicals. Have recent climate change and human activities increased the risk of wildfires, and how may these affect local plant communities through physiologically active smoke compounds? Is the response of seeds to smoke and smoke compounds an evolutionarily driven trait that allows plants to adapt to the environment? What can we learn by examining post-fire smoke on a large scale?

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