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Pollen-tube growth after controlled pollination in two apricot selections. Photographs show the style of pistils. A, Self-pollination in Goldrich (S1S2). B, Self-pollination in seedling GC-147 (S2S2). C, Cross-pollination between Goldrich and seedling GC-147 (S2S2). Pollen tubes of self-incompatible cv Goldrich are arrested at the upper part of the pistil (A), but those of the two compatible pollinations complete their development in the pistil and reach the ovary tissue (B and C).
