Increased heat resistance in mycelia from wood fungi prevalent in forests characterized by fire: a possible adaptation to forest fire

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• 作者：Fredrik Carlsson ; Mattias Edman ; Svante Holm ; Anna-Maria Eriksson ; Bengt Gunnar Jonsson
• 关键词：Adaptation ; Basidiomycetes ; Competition ; Dead wood ; Ecology ; Forest fire ; Mycelia ; Resistance to heat ; Restoration fires ; Saprotrophic
• 刊名：Fungal Biology
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：116
• 期：10
• 页码：1025-1031
• 全文大小：353 K

文摘

Forest fires have been the major stand-replacing/modifying disturbance in boreal forests. To adapt to fire disturbance, different strategies have evolved. This study focuses on wood fungi, and a specific adaptation to forest fire: increased heat resistance in their mycelia. Fifteen species of wood fungi were selected and a priori sorted in two groups according to their prevalence in fire-affected environments. The fungi were cultivated on fresh wood and exposed to 100, 140, 180, 220?¡ãC for 5, 10, 15, 20 and 25?min. under laboratory conditions. A clear difference was found among the two groups. Species prevalent in fire-affected habitats had a much higher survival rate over all combinations of time and temperature compared to species associated with other environments. Thus, the results indicate that fire adaptation in terms of increased heat resistance in mycelia occurs in some species of wood fungi. Such adaptation will influence the ecology and population dynamics of wood fungi, as well as having implications for best practices during restoration fires.