Auxins influence the growth of stems toward light (phototropism) and against the force of gravity (geotropism).

它影响茎向光性和背地性。

The geotropism growth was a response of hypha to gravity and the geotropic sensitive was at the hyphal apex.

丛枝菌真菌菌丝延伸部位是菌丝尖端，其向地性是对地心引力感应，感应敏感部位也在菌丝尖端。