| The chloroplasts of some plants show the invagination of the inner membrane into granum particularly in Sorghum, maize and sugarcane. |
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| The internal membranes are shaped like disks and are often stacked together, forming a granum. |
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| The number of thylakoids per granum is influenced greatly by the irradiation intensity during development. |
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| Those appressed to another thylakoid in a stack called a granum are "appressed" or "agranal" thylakoids. |
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