College of Life Sciences, Hebei University, Baoding, China.
Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia.
Ecol Lett. 2023 Jul;26(7):1108-1118. doi: 10.1111/ele.14224. Epub 2023 Apr 20.
Genomic traits reflect the evolutionary processes that have led to ecological variation among extant organisms, including variation in how they acquire and use resources. Soil fungi have diverse nutritional strategies and exhibit extensive variation in fitness along resource gradients. We tested for trade-offs in genomic traits with mycelial nutritional traits and hypothesize that such trade-offs differ among fungal guilds as they reflect contrasting resource exploitation and habitat preferences. We found species with large genomes exhibited nutrient-poor mycelium and low GC content. These patterns were observed across fungal guilds but with varying explanatory power. We then matched trait data to fungal species observed in 463 Australian grassland, woodland and forest soil samples. Fungi with large genomes and lower GC content dominated in nutrient-poor soils, associated with shifts in guild composition and with species turnover within guilds. These findings highlight fundamental mechanisms that underpin successful ecological strategies for soil fungi.
基因组特征反映了导致现存生物之间生态变异的进化过程，包括它们获取和利用资源的方式的变异。土壤真菌具有多样化的营养策略，并在资源梯度上表现出广泛的适应性变化。我们测试了菌丝营养特征与基因组特征之间的权衡关系，并假设这些权衡关系在真菌类群之间存在差异，因为它们反映了不同的资源利用和栖息地偏好。我们发现，基因组较大的物种具有营养贫乏的菌丝和低 GC 含量。这些模式在整个真菌类群中都有观察到，但解释力各不相同。然后，我们将特征数据与在 463 个澳大利亚草原、林地和森林土壤样本中观察到的真菌物种进行匹配。基因组较大且 GC 含量较低的真菌在营养贫乏的土壤中占主导地位，与类群组成的变化以及类群内的物种更替有关。这些发现强调了支撑土壤真菌成功生态策略的基本机制。
