Abstract: The characteristics of pollen germination and pollen tube growth were studied by using ‘Dawuxing’ as test material. The results showed that the stigma receptivity lasted about 7 days and the pollen germination time was various among stigmas and there were long intervals among different stigmas (3-4 days). The rate of pollens whose tubes reached upper styles to germinated pollens was significantly higher than those reaching in open pollination and self-pollination. But there was no obvious difference in cross-pollination. The percentage of ovules in which pollen tube growth was normal in cross-pollination was obviously higher than that in self-pollination. The differences of pollen tube growth were remarkable in normally growing ovules, lightly degenerated ovules and completely degenerated ovules and also between the ovules of fallen flowers and normal sear flowers. Therefore, it could be concluded that ‘Dawuxing’ was self-incompatibility to some extent and pre-fertilization barrier was the basic reason for serious embryo abortion and the abundant genetic diversity of plants from degenerate seeds.
Yang Qin , Deng Qun-Xian , Wang Yong-Qing , Liu Lu , Fu Yan , Li Ying-Hong , Tao Lian and Luo Shi-Feng , 2008. Study on Characteristics of in situ Pollen Germination and Pollen Tube Growth of Loquat. Plant Sciences Research, 1: 50-55.