The rate of root growth and the plasticity of root architecture
along with the development of the rhizosphere, through either root
growth or extension of root hair, are clearly important for effective
exploration of soil and interception of nutrients. Root hair can
constitute up to 70% of root volume and may absorb up to 80% of
phosphorus in non-mycorrhizal plants (Fohse et al., 1991). Mycorrhizal
fungi colonise the root cortex and extend externally, connecting
the roots with surrounding soil and increasing efficiency of
phosphorus acquisition by mycorrhizal plants