Auxin is the phytohormone responsible for many aspects of plant growth and development, such as apical dominance and tropisms, but the underlying auxin transport mechanisms remain poorly understood.

Axis formation occurs in plants, as in animals, during early embryogenesis. However, the underlying mechanism is not known. Here we show that the first manifestation of the apical–basal axis in plants ...

Auxin plays a central role in plant life. The hormone regulates various processes, from embryonic development to the formation of roots and the directional growth in response to light and gravity.