Biology Reference
In-Depth Information
~27
µ
m in 10 minutes. Such abrupt turning behaviours were not observed when
a single tube approached a virgin ovule. Instead, these tubes changed their growth
direction by 60 ± 38° (s.d; n = 60), migrating toward, and not away, from the
micropyle.
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). Elapsed time
in minutes; Scale bars, 100
µ
m.
