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Repulsion by an ovule II

  Video 4. Pollen tube repulsion by a targeted ovule in an  in vitro  guidance assay

Three pollen tubes approach an ovule, however the pollen tube that arrived at the micropyle first was successful.

The unsuccessful tubes approached the micropyle; however, one of them turned away from it, while the other one skips the micropyle and grows over the successful tube and stalls.

The repulsion behaviors initiate well ahead of pollen tube discharge within ovule.

Ref:  Palanivelu & Preuss (2006), BMC Plant Biology; 6:7 .

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Video | by Dr. Radut