Responses of the root rot fungus Collybia fusipes to soil waterlogging and oxygen availability
Responses of the root rot fungus Collybia fusipes to soil waterlogging and oxygen availability
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DOI：
10.1017/s095375620300830x
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发表时间：
2003-09-01
影响因子：
--
通讯作者：
Marçais, B
中科院分区：
文献类型：
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作者：
Camy, C;Dreyer, E;Marçais, B
Collybia fusipes 是成熟有蒂橡树林中常见的根腐真菌，会导致树根系统严重破坏，特别是在干燥或轻度浸水的土壤中。我们想要检查，在受控条件下或在森林生态系统中，土壤被水饱和期间 O-2 的减少是否会与疾病进化相互作用。在温室中测试了浸水的橡树幼苗对 C.fusipes 的敏感性，并在森林的水态土壤中评估了病原体在木质基质中的存活情况。在受控条件下和林分中都证明了土壤渍水对 C. fusipes 生存的直接有害影响。在低 O-2 摩尔分数下监测琼脂培养基上的 C. fusipes 菌丝体的生长，并与蜜环菌和 Heterobasidion annosum 的生长进行比较。在 C.,fusipes 和 H. annosum 中，菌丝体生长急剧减少，但在 A. mellea 中则不然。
Collybia fusipes is a common root rot fungus in mature pedunculate oak forest, that causes drastic destruction of the tree root systems, especially in dry or mildly waterlogged soils. We wanted to check, under controlled conditions or in forest ecosystems, whether reduced O-2 during saturation of the soil by water could interact with disease evolution. Susceptibility of waterlogged oak seedlings to C.fusipes was tested in a greenhouse and the survival of the pathogen in woody substrates was assessed in hydromorphic soils in a forest. A direct and detrimental effect of soil waterlogging on C. fusipes survival was evidenced both under controlled conditions and in forest stands. Growth of C. fusipes mycelium on agar media was monitored under low O-2 mole fraction and compared to that of Armillaria mellea and Heterobasidion annosum. A drastic reduction in mycelial growth was evidenced in C.,fusipes and H. annosum but not in A. mellea.