Figure 5From: The mechanism of pollination drop withdrawal in Ginkgo biloba L.Comparison of PD withdrawal in upright and inverted ovules. (A) Comparison of PD withdrawal rates for upright and inverted ovules; (B) PD withdrawal of inverted ovules; (C) pollinated PD withdrawal under 100% relative humidity. O, ovule; P, pollen grains; Mi, micropyle. Scale bars = 200 μm.Back to article page