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Figure 5 | BMC Plant Biology

Figure 5

From: Evaluation of reproductive barriers contributes to the development of novel interspecific hybrids in the Kalanchoë genus

Figure 5

Pollen tube growth and fertilization of Kalanchoë species. (A) Pollen grains of K. pubescens on stigma of K. blossfeldiana ‘Jackie’ 24 h after pollination (a.p.). (B) Branching of pollen tube, K. campanulata x K. blossfeldiana ‘0089A’, 24 h a.p. (C) Stopped in growth pollen tubes of K. blossfeldiana ‘0089A’ in the style of K. pubescens, 24 h a.p. (D) Spiky pollen tubes, K. campanulata x K. blossfeldiana ‘0089A’, 24 h a.p. (E) Swelling tip of pollen; K. gracilipes x K. blossfeldiana ‘Jackie’, 48 h a.p. (F) Pollen tubes of K. pubescens in the ovary of K. blossfeldiana ‘0089A’, 48 h a.p. (G) Pollen tube of K. campanulata penetrating the ovule of K. blossfeldiana ‘0089A’, 48 h a.p. (H) Pollen tube of K. pubescens penetrating the ovule of K. blossfeldiana ‘Jackie’, 48 h a.p. (I) Pollen tube of K. nyikae penetrated the ovule of K. blossfeldiana ‘0089A’, 24 h a.p. Scale bars: 100 μm.

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