grown in full sunlight. Most grana had a regular tetragonal or
oblong shape in the DP and MP type plants from full sunlight and
50% treatment, but they become much irregular shape of trapezoidal
and sometimes triangular in the plants grown under 20 and
5% treatments. Especially, the grana disorganized and contained
less lamellae in the plants grown under 5% low irradiance of MP
type (Fig. 5jel). Additionally, the number of SG decreased in the
plants from 5% treatment, and more and larger SGs were observed
in those leaves grown under 20 (of DP type) and 50% (of MP type)
treatments (Figs. 4and 5). Overall, the chloroplasts of the DP type
leaves grown in 20% irradiance treatment developed best and that
of MP type in 50% irradiance was best.