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aalbtraum, UserMod Light

It seems complicated.

“This is a very little known phenomenon discovered in 2002: Nicotiana (Tabak) is predominantly C3-Plants, but in the bundle separations of the stems and leaf stems, photosynthesis takes place according to the pattern of the C4– Plants instead (Hibberd & Quick 2002).”

Source: https://www.transgen.de/lexikon/1570.c4-plant.html