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. 2020 Feb 26;21(5):1600. doi: 10.3390/ijms21051600

Figure 1.

Figure 1

Pollen tube growth from 2 h to 72 h in the pistil after self- and cross-pollination in Camellia oleifera. (A) Pollen grain germination on stigma at 2 h after cross-pollination (CP) (100×). (B) Pollen grain germination on stigma at 2 h after self-pollination (SP) (100×). (C) Pollen tube growth to the base of the style at 48 h after CP (40×). (D) Pollen tube growth to the base of the style at 48 h after SP (40×). (E) Pollen tube growth to the upper part of ovary at 48 h after CP (200×). (F) Pollen tube growth to ovary at 48 h after SP (100×). (G) Pollen tube growth to ovule at 72 h after CP (200×). (H) Pollen tube growth to ovary at 72 h after SP (100×). (I–K) Abnormally shaped pollen tubes at the base of style after SP. (L) Abnormally shaped pollen tube at the upper part of ovary after SP. Pt = pollen tube, Es = embryo sac, Oi = outer integument and Ii = inner integument.