The same section viewed in Darkfield shows the endosperm now packed out with starch. | |
TS at low power shows that the compression and adhesion of the cuticular layers is position dependant. The cheeks of the grain are the first to adhere; the dorsal surface adheres later. For more information on the layers surrounding the embryo sac go to the special section. | |
The cells of the aleurone layer have a granular appearance and are embedded in a firm matrix. This granular appearance is the result of the vacuoles filling with protein. For more information on the changes in these cell layers go to the special section. | |
The mature endosperm packed with starch grains (viewed at high magnification in polarized light). The larger, type-A, starch granules are lens shaped; the smaller, type - B, which are added after the type- A are spherical. | |
Here the endosperm has filled out and now meets the surrounding maternal tissues. The prismatic endosperm cells are packed with starch. The larger, type-A, starch granules are lens shaped; the smaller, type - B, which are added after the type- A are spherical. 26 days after flowering. |