南京林业大学学报（自然科学版）2017，Vol.41Issue(2)：34-40,7.DOI:10.3969/j.issn.1000-2006.2017.02.006
东京野茉莉雌雄蕊的形态及显微结构
Microstructure of pistils and stamens in Styrax tonkinensis
摘要
Abstract
[Objective] Learn the morphology and microstructure of flowers, pistils and stamens in Styrax tonkinensis, and probe into the reasons of pollen abortion.[Method]The macrostructure, microstructure and ultrastructure of the pistils and stamens were studied by light and electron microscopy. [Result]① There were 10 stamens composed of fila?ments and anthers in each bisexual flower. The width and length of a filament was approximately (0.38±0. 12) mm and (8.24±0.72) mm, respectively. The mature anthers were composed of two narrow circular chambers. Three or four ger?minal furrows in the exine of mature pollen with finely reticulate ornamentation were observed by scanning electron mi?croscopy( SEM) . Furthermore, we observed a form of shrunken, poorly developed pollen. Using transmission electron microscopy, we observed that in well-developed pollen cells, there were two layers in the pollen wall, a dense cyto?plasm, some Golgi apparatus, a large number of mitochondria, and a high proportion of electron dense materials and starch grains. ②There was one pistil per flower composed of a stigma, style and ovary. There were"Y"?type furrow and ellipsoidal mastoids on the stigma, and secretions after pollination. The style was hollow, and there were many anatro?pous ovules attached to the placenta on the inner wall of its three?chambered ovary. In the late period of development, only one or two of these ovules developed into seeds, whereas the others became degraded.[Conclusion]The characteris?tics of S. tonkinensis flower were accordance with Styracaceae. The pollen had 3 forms. The stigma was wet type. The o?vule was anatropous. There were rich cytoplasm and more organelles in the cells of the pollen and the integument.关键词
东京野茉莉/雌雄蕊/扫描电镜/透射电镜Key words
Styrax tonkinensis/pistil and stamen/scanning electron microscope ( SEM)/transmission electron micro⁃scope ( TEM)分类
农业科技引用本文复制引用
徐丽萍,喻方圆..东京野茉莉雌雄蕊的形态及显微结构[J].南京林业大学学报（自然科学版）,2017,41(2):34-40,7.基金项目
江苏高校优势学科建设工程资助项目( PAPD) （ PAPD）
江苏省农业"三新"工程项目( SZX2014S0020) （ SZX2014S0020）
江苏省林业"三新"工程项目(Lysx[2014]26) （Lysx[2014]26）
