  Results appeared since the last APN meeting on the relation between
abundances and PNe morphological features are reviewed here. Statistical
analyses of round, elliptical, and bipolar PNe clearly separate the latter
group as having larger He and N/O abundances. Studies of individual PNe,
including the UV and IR domains, allow a detailed comparison with evolutionary
models for the AGB phase; the abundances of most important elements can be
matched but an 'age-metallicity' problem for the progenitors of He-rich PNe is
implied. Halo abundances do not show strong chemical differences with respect
to the PN rims, but the halos' faintness requires deeper data to confirm it.
Data on the chemistry of microstructures of normal (non H-deficient) PNe are
scarce and generally indicate similar abundances than in the rims. The
exception is the high nitrogen overabundance claimed for FLIERS; preliminary
modeling on new observational data of the microstructures of NGC7009 indicates
that a moderate enrichment of nitrogen can be real.
