Behavior of pollen from a wind-pollinated angiosperm in PDs. (A) Pollen grains of Salix babylonica were applied to PDs; (B) pollen grains afloat on the surface; (C) pollen grains accumulated on the micropyle. O, ovule; P, pollen grains; Mi, micropyle. Scale bars = 200 μm.
Jin et al. BMC Plant Biology 2012 12:59 doi:10.1186/1471-2229-12-59