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. 2018 Mar 8;121(7):1319–1331. doi: 10.1093/aob/mcy029

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Fig. 5. — Heat maps showing the total distribution and frequency of pollen grains on the bract scale/ovuliferous scale complexes of Abies koreana (A–F) and Picea jezoensis (G–L) under natural (A, B, G, H) and artificial pollination regimes at two different wind speeds (C–F, I–L). The colour spectrum indicates frequency of observed pollen grains (blue, 1 grain; red, ≥5 grains). All panels show aggregated data from multiple complexes superimposed on a representative image of a cone scale for visual comparison. In Abies, the reduced ovuliferous scale can be seen only in the adaxial (top) surface view (A, C, E), along with the funnel-shaped integuments that protrude outwards from the scale. Ovule micropyles face downwards, however, and are visible in the abaxial (bottom) view (B, D, F). Pollen grains were found both around the integument and inside the micropyle. In Picea, micropylar arms are more clearly exposed in the adaxial view (G, I, K). The reduced bract scale can be seen only in the abaxial view (H, J, L). In all cases, note the high concentration of pollen grains on the integuments surrounding the micropyles. Scale bars = 500 µm.

Fig. 5. — Heat maps showing the total distribution and frequency of pollen grains on the bract scale/ovuliferous scale complexes of Abies koreana (A–F) and Picea jezoensis (G–L) under natural (A, B, G, H) and artificial pollination regimes at two different wind speeds (C–F, I–L). The colour spectrum indicates frequency of observed pollen grains (blue, 1 grain; red, ≥5 grains). All panels show aggregated data from multiple complexes superimposed on a representative image of a cone scale for visual comparison. In Abies, the reduced ovuliferous scale can be seen only in the adaxial (top) surface view (A, C, E), along with the funnel-shaped integuments that protrude outwards from the scale. Ovule micropyles face downwards, however, and are visible in the abaxial (bottom) view (B, D, F). Pollen grains were found both around the integument and inside the micropyle. In Picea, micropylar arms are more clearly exposed in the adaxial view (G, I, K). The reduced bract scale can be seen only in the abaxial view (H, J, L). In all cases, note the high concentration of pollen grains on the integuments surrounding the micropyles. Scale bars = 500 µm.