[Observation of pollen tube germination of Platycodon grandiflorum by fluorescence microscopy].

Objective: To determine the self-compatibility of Platycodon grandiflorum and the location of microspore germination on stigma.

Method: The microspore germination of self-pollination, self-plant-pollination and cross-pollination and the pollination microspore germination in and outside of stigma were observed with fluorescence microscopy.

Result: Most pollens of self-pollination, self-plant-pollination and cross-pollination can germinate on the stigma, and after 24 hours, pollen tube entered into the ovary successfully.