前言 对梨果及石细胞团发育过程的研究,在国外虽有报道,但仅涉及西洋梨;国内研究多限于梨果实增大动态及石细胞大小与品质关系等方面。本研究对不同种和品种梨的果实生长发育动态,幼果果肉薄壁细胞的分裂、增生;原基厚壁细胞的出现,聚簇、木质化与石细胞团的形成;团围薄壁细胞 Preface The research on the development of pear and stone cell mass has been reported in foreign countries, but it is only concerned with pear. The domestic research is mostly limited to the increase of pear fruit and the relationship between the size and quality of stone cells. In this study, the fruit growth and development of different species and varieties of pear fruit, young fruit parenchyma cells division, proliferation; the appearance of primary thick-walled cells, clustering, lignification and stone cell mass formation;