5.6. Chloroplast ultrastructure
The peel tissue (1 mm3)
was fixed in 2.5(V/V) glutaraldehyde
and 1% formaldehyde for
24 h at 4°C. The
samples
were post-fixed in 1 %
osmium tetroxide and then dehydrated
in
a graded series of
ethanol.
The
samples were embedded
in
Epon812
resin (Oken,
Japan). Ultrathin sections were
cut on the Leica EM UC6 (Leica, Germany). The sections
were stained with uranyl acetate and lead citrate and examined
with the transmission electron microscope (Tecnai
12,
Philips Corp, Holland).