【摘要】 报道华木莲花药的结构和小孢子的形成与发育。华木莲雄蕊多数、离生;每一花药具4个花粉囊。花粉囊由1层表皮、1层纤维层、2层中层和2层绒毡层细胞组成。腺质绒毡层在小孢子发生发育过程中,呈现出解体-恢复-解体直至消失的现象。减数分裂为同时型,四分体主要为左右对称和四面体形。撒粉时的成熟花粉为二细胞结构。更多还原

【Abstract】 Anther structure and the formation and development of microspores were studied of Sinomanglietia glauca Z. X. Yu et Q. Y. Zheng, an endangered monotypic species of Magnoliaceae found in Jiangxi Province in 1988. The stamens numerous, distinct. Each anther with four pollen sacs. Mature anther wall comprises an epidermis followed by endothecium layer, 2 middle layers, and a single-layered tapetum. During the development of micro-sporogenesis, glandular tapetum appears disintegrated, recovered, then disintegrated until disappeared. The meiotic division of pollen mother cells is of simultaneous type. The arrangement of microspores in a tetrad is tetrahedral and isobilateral. Mature pollen grains are released at 2-celled stage. The characters of anther structure in S. glauca coincide with those in Manglietia glauca var. sumatrana, M. insignis, and M. aromatica, except the tapetum which consists of only one cell layer in S. glauca.更多还原