Filamentous growth brings several advantages to fungi. The first one, it allows a radial growth, which maximizes the probability of resource encounter (that is, it is easier to find what the fungi needs, like water and food). Second, radial growth allows a better tolerance to perturbation, since the fungi is distributed in a wide area, it is likely that some of its tissue endure unharmed the perturbation. Third, radial growth allows the fungi to establish symbiotic associations with ease, also it allows the fungi to have a better performance to his symbiotic partner. For example, several fungi can stablish symbiotic association with tree's roots, these fungi are called ectomycorrhizas. The radial growth, allows ectomycorrhizas to find water easily, which benefits the tree, and brings success to the alliance fungi-tree.