Figure 3.

Pollen tubes avoid targeted ovules. Two examples (a–h and i–p) of pollen tube avoidance by ovules approached by three pollen tubes (false colour: green, the tube that enters the micropyle (*); pink and red, tubes that arrive later and do not enter; entire set of original images are presented in Additional Files 3 and 4). Elapsed time in minutes; Scale bars, 100 μm.