Stroma lamellae connect thylakoids of two different grana. They increase the efficiency of photosynthesis by keeping grana at a distance so that they do not clutter together. They are also known as stroma thylakoids. They ensure that maximum energy from sunlight is captured in photosynthesis.
The stroma lamellae also contain Photosystem I and chlorophyll.
This was in brief about Stroma lamellae. Test your understanding with MCQs on Chloroplasts, only at BYJU’S.