the differentiation of calyptrogen cells into columella statocytes is characterized by the following sequential events : ( 1 ) formation of er complexes at the distal and proximal ends of the cell , ( 2 ) differentiation of proplastids into amyloplasts , ( 3 ) sedimentation of amyloplasts onto the distal er complex , ( 4 ) breakdown of the distal er complex and sedimentation of amyloplasts to the bottom of the cell , and ( 5 ) formation of sheets of er parallel to the longitudinal cell walls .
C0007589
differentiation
C0007634
cell