Tapetum (botany)
Encyclopedia
The tapetum is a layer of cells that is found within the pollen sac, a nutritive tissue within the sporangium
, particularly within the anther. Tapetum is important for the development of pollen grains. The cells are usually bigger and normally have 2 nuclei per cell. It helps in pollenwall formation, transportation of nutrients to inner side of anther, synthesis of callase enzyme for separation of microspore tetrads. Orbicules
originate as small lipid droplets, called pro-orbicules, in the rough endoplasmatic reticulum of the tapetum.
Sporangium
A sporangium is an enclosure in which spores are formed. It can be composed of a single cell or can be multicellular. All plants, fungi, and many other lineages form sporangia at some point in their life cycle...
, particularly within the anther. Tapetum is important for the development of pollen grains. The cells are usually bigger and normally have 2 nuclei per cell. It helps in pollenwall formation, transportation of nutrients to inner side of anther, synthesis of callase enzyme for separation of microspore tetrads. Orbicules
Orbicule
Orbicules are small a-cellular structures of sporopollenin Orbicules (syn. Ubisch bodies, con-peito grains) are small a-cellular structures of sporopollenin Orbicules (syn. Ubisch bodies, con-peito grains) are small a-cellular structures of sporopollenin (known size range from Orbicules (syn....
originate as small lipid droplets, called pro-orbicules, in the rough endoplasmatic reticulum of the tapetum.