The specific character of C4 plants is
bulliform cells
Kranz anatomy
parallel venation
isobilateral leaf
B.
Kranz anatomy
The C4 plants have Kranz anatomy. The vascular bundle of the leaf is surrounded by one or more layer of chloroplast, containing cells (bundle sheath cells). The bundle sheath cells lack grana in their chloroplast while mesophyll cells have well developed grana. The mesophyll cells are specialized for light reaction and initial CO2 fixation during photosynthesis. The CO2 is finally fixed inside bundle sheath cell through Calvin cycle.
Photosynthetic bacteria have :
pigment system I (only one pigment system)
pigment system II
both (a) and (b)
some other type
C4 plants, synthesis of sugars/final CO2 fixation occurs in:
palisade cells
spongy cells
undifferentiated mesophyll cells
bundle sheath cells
Active K+ exchange mechanism for opening and closing of stomata was given by
Darwin
Levit
Scarth
Khorana
