tetrad
MEIOSIS
pollen mother
cell
callasse
free
microspores
polarized microspore
MICROSPOROGENESIS MICROGAMETOGENESIS
POLLEN MITOSIS I
vacuole
vegetative cell
generative cell
POLLEN MITOSIS II
vegetative nucleus
mature tricellular pollen grain
germinating pollen grain
Figure 2.3.1 Male gametophyte development
a distal
proximal
anterior
posterior
FG1 FG2 FG4 FG5 FG6 FG7FG3
cv CCN
E C
S C
AC
I. II. III.
Figure 2.3.2 Female gametophyte development
b c d