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What is pollon sec in flower |
| Answer» The pollen sacs are surrounded by four layers. They are stated below:\tTarentum: The cells are multinucleate and this layer is one of the innermost layers of the wall.\tMiddle layer: It is composed of three to four layers thin-walled cells. They are situated just below the endothelium.\tEndothecium: This layer is inner to the epidermis. Some cell develops cells of endothecium.\tEpidermis: It is a protective outermost single-layer. Cells of the epidermis in Arceuthobium develop a fibrous thickening and the epidermis is designated as exothecium. | |