Population dynamics of the ectomycorrhizal fungal species Tricholoma populinum and Tricholoma scalpturatum associated with black poplar under differing environmental conditions.
Population dynamics of the ectomycorrhizal fungal species Tricholoma populinum and Tricholoma scalpturatum associated with black poplar under differing environmental conditions.
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不同环境条件下与黑杨相关的外生菌根真菌种群动态。
DOI：
10.1111/j.1462-2920.2005.00957.x
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发表时间：
2006
影响因子：
5.1
通讯作者：
M. Gardes
中科院分区：
文献类型：
--
作者：
H. Gryta;Fabian Carriconde;J. Charcosset;P. Jargeat;M. Gardes
真菌结合了有性繁殖和无性繁殖的联合收割机。这两种繁殖模式之间的平衡影响建立动态，并最终影响种群的进化潜力。研究了杨树口蘑和头皮口蘑两种外生菌根真菌的定殖模式。前者被认为是宿主专家，而T。这两个担子菌种的子实体的映射和收集了几年的黑白杨（杨树黑）站，在两个不同的网站。根据随机扩增多态性DNA（RAPD）、简单重复序列（ISSR）和核糖体DNA基因间隔区（rDNA IGS）的限制性片段长度多态性（RFLPs）分析，鉴定多位点基因型（=基因型）。遗传分析揭示了两个物种之间的本地种群动态的差异。口蘑倾向于通过有性孢子捕获新的空间，而口蘑则倾向于通过有性孢子捕获新的空间。Populinum通过克隆生长做到这一点，表明在基因组水平上进行资源分配的权衡。基因的数量和大小强烈不同的两个研究地点之间，可能是由于非生物干扰菌丝建立和基因的行为。
Fungi combine sexual reproduction and clonal propagation. The balance between these two reproductive modes affects establishment dynamics, and ultimately the evolutionary potential of populations. The pattern of colonization was studied in two species of ectomycorrhizal fungi: Tricholoma populinum and Tricholoma scalpturatum. The former is considered to be a host specialist whereas T. scalpturatum is a generalist taxon. Fruit bodies of both basidiomycete species were mapped and collected over several years from a black poplar (Populus nigra) stand, at two different sites. Multilocus genotypes (= genets) were identified based on the analysis of random amplified polymorphic DNA (RAPD) patterns, inter-simple sequence repeat (ISSR) patterns and restriction fragment length polymorphisms (RFLPs) in the ribosomal DNA intergenic spacer (rDNA IGS). The genetic analyses revealed differences in local population dynamics between the two species. Tricholoma scalpturatum tended to capture new space through sexual spores whereas T. populinum did this by clonal growth, suggesting trade-offs in allocation of resources at the genet level. Genet numbers and sizes strongly differ between the two study sites, perhaps as a result of abiotic disturbance on mycelial establishment and genet behaviour.