Pollen and Anther Development in Lycium ruthenicum (Solanaceae)

Lycium ruthenicum is a nutritional food, and is a native medicinal plant of Iran. It has widely been used for treatment of different diseases in traditional Chinese medicine. There is not any report about detailed embryological features of L. ruthenicum. The goal of this study was to investigate the microsporogenesis, and microgametogenesis in detail, in this plant. The young flowers and buds were removed in various developmental phases, fixed in FAA and kept in ۷۰% ethanol. Specimens were embedded in paraffin and sectioned using microtome. Staining was carried out with Hematoxylin-Eosine. Results showed that the anther is tetrasporangiate. The cytokinesis is simultaneous. The tapetum is of the secretory type and the microspore tetrads are tetrahedral. The tapetum is binucleate in most parts, but uninucleate in some. The pattern of wall formation is basic type. The endothecium becomes fibrous in mature anthers .The pollen grains are two-celled when shed and the anther dehiscence is Entrose. The mature pollen grains are spherical and tricolporate with gemmate decorations. The maturation of pollen grains is synchronous in adjacent pollen sacs.

کلیدواژه ها:

Microsporogenesis ، Microgametogenesis ، Microspore ، Tapetum