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Ultrastructures of Pollen and Papillar Cell of Arabidopsis during Pollination
Ma Jifeng, Wang Xiuling*
College of Life Sciences, Shandong Agricultural University, State Key Laboratory of Crop Biology, Taian 271018, China
Abstract: We investigated the ultrastructures of pollen grains and stigmatic papillae cells before and after pollination of Arabidopsis by using transmission electron microscopy. We found some structures， not being reported previously， may be involved in the interaction between the pollen grains/tubes and the papillae cells. (1) In mature pollen grains， the electron-transparent vacuoles 200~1 000 nm are even distribution in cytosol， and some membrane structures are present in those vacuoles， especially the pollen before hydration. (2) The even distribution of vacuoles is changed to polar distribution after pollen germination. (3) Wall ingrowths were found in the inner wall of the papillar cells before and after pollination， which means papillar cells maybe function actively in pollination of Arabidopsis.
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