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Ecological memory and relocation decisions in fungal mycelial networks: responses to quantity and location of new resources.
The ISME Journal ( IF 10.8 ) Pub Date : 2019-10-18 , DOI: 10.1038/s41396-019-0536-3 Yu Fukasawa 1, 2 , Melanie Savoury 1 , Lynne Boddy 1
The ISME Journal ( IF 10.8 ) Pub Date : 2019-10-18 , DOI: 10.1038/s41396-019-0536-3 Yu Fukasawa 1, 2 , Melanie Savoury 1 , Lynne Boddy 1
Affiliation
Saprotrophic cord-forming basidiomycetes, with their mycelial networks at the soil/litter interface on the forest floor, play a major role in wood decomposition and nutrient cycling/relocation. Many studies have investigated foraging behaviour of their mycelium, but there is little information on their intelligence. Here, we investigate the effects of relative size of inoculum wood and new wood resource (bait) on the decision of a mycelium to remain in, or migrate from, inoculum to bait using Phanerochaete velutina as a model. Experiments allowed mycelium to grow from an inoculum across the surface of a soil microcosm where it encountered a new wood bait. After colonisation of the bait, the original inoculum was moved to a tray of fresh soil to determine whether the fungus was still able to grow out. This also allowed us to test the mycelium's memory of growth direction. When inocula were transferred to new soil, there was regrowth from 67% of the inocula, and a threshold bait size acted as a cue for the mycelium's decision to migrate for a final time, rather than a threshold of relative size of inoculum: bait. There was greater regrowth from the side that originally faced the new bait, implying memory of growth direction.
中文翻译:
真菌菌丝网络中的生态记忆和重新定位决策:对新资源的数量和位置的响应。
腐生索状担子菌的菌丝体网络位于森林地面土壤/凋落物界面,在木材分解和养分循环/重新分配中发挥着重要作用。许多研究调查了它们菌丝体的觅食行为,但关于它们智力的信息很少。在这里,我们使用绒毛原毛平毛毛革菌(Phanerochaete velutina)作为模型,研究了接种物木材和新木材资源(诱饵)的相对大小对菌丝体留在接种物中或从接种物迁移到诱饵的决定的影响。实验允许菌丝体从接种物中生长出来,穿过土壤微观世界的表面,在那里它遇到了新的木饵。饵料定殖后,将原始接种物移至装有新鲜土壤的托盘中,以确定真菌是否仍能生长出来。这也使我们能够测试菌丝体对生长方向的记忆。当接种物转移到新土壤中时,67% 的接种物重新生长,阈值诱饵大小充当菌丝体决定最后一次迁移的提示,而不是接种物相对大小的阈值:诱饵。最初面对新诱饵的一侧有更大的再生,这意味着对生长方向的记忆。
更新日期:2019-10-19
中文翻译:
真菌菌丝网络中的生态记忆和重新定位决策:对新资源的数量和位置的响应。
腐生索状担子菌的菌丝体网络位于森林地面土壤/凋落物界面,在木材分解和养分循环/重新分配中发挥着重要作用。许多研究调查了它们菌丝体的觅食行为,但关于它们智力的信息很少。在这里,我们使用绒毛原毛平毛毛革菌(Phanerochaete velutina)作为模型,研究了接种物木材和新木材资源(诱饵)的相对大小对菌丝体留在接种物中或从接种物迁移到诱饵的决定的影响。实验允许菌丝体从接种物中生长出来,穿过土壤微观世界的表面,在那里它遇到了新的木饵。饵料定殖后,将原始接种物移至装有新鲜土壤的托盘中,以确定真菌是否仍能生长出来。这也使我们能够测试菌丝体对生长方向的记忆。当接种物转移到新土壤中时,67% 的接种物重新生长,阈值诱饵大小充当菌丝体决定最后一次迁移的提示,而不是接种物相对大小的阈值:诱饵。最初面对新诱饵的一侧有更大的再生,这意味着对生长方向的记忆。