Abstract:In order to understand the development of jackfruit (Artocarpus heterophyllus Lam.) pulps, the anatomical structure of its pulps during development was observed under light microscope by using water slice and paraffin section. The results showed that jackfruit pulp consisted of epidermis, basis tissues and vascular bundles. Starch grains appeared in epidermis and basis tissues at 8 weeks after flowering and then degraded at mature stage, showing obvious storage function. The shape of outer epidermis cells are regular, and cell wall of inner epidermis cell has more primary pit fields than that of outer epidermis cells. The vascular bundles in pulp are undeveloped, and there is no significant change throughout development process. The mature of jackfruit pulps was at 18 to 19 weeks after flowering. These accumulate materials for anatomical studies of jackfruits.