Answer: This membrane system is repeatedly folded into numerous channels and
stacked disks known as granum (plural grana). This internal membrane system
is many times referred to as teh thylakoid membrane system, and it is where
the first stage (light dependent reactions) of photosynthesis occur.
thylacoid membrane system/granum
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Abstract. We Investigated The Three-Dimensional Architecture Of Isolated Granal Thylakoid Membranes By Using High Voltage (1 200 Kv) Electron Tomography On 250 Nm Thick Parts Of Isolated Intact Thylakoid Preparations Fixed And Stained With Conventional Electron Microscopy Techniques. High Resolution Reconstructed Tomographic Images Were Obtained Which Clearly Resolved The Membranes And The Lumenal Spaces And Thus Also The Connections Between The Stacked And Non-Stacked Thylakoid Membranes.
More Thylakoid Membrane System/granum images
Thylakoids are membrane -bound structures embedded in the chloroplast stroma.A stack of thylakoids is called a granum and resembles a stack of coins. Membrane . The thylakoid membrane is the site of the light-dependent reactions of photosynthesis with the photosynthetic pigments embedded directly in the membrane .
The thylakoid membranes of higher plant chloroplasts have a unique organization into stacks of flattened disk-shaped sacs or lamellae in which the membranes of adjacent lamellae are closely appressed (granal lamellae) and lamellae in which the membranes are not appressed and thus their outer surfaces are in direct contact with the stroma (stromal lamellae) (Fig. 2.16).
Thylakoid membranes are the internal membranes of chloroplasts and accommodate all light-harvesting an...