-
shape and form a
resistant outer wall
called the
exine and an
inner wall
called the intine. The
exine is what is
preserved in the
fossil record. Two basic...
- is a
biological polymer found as a
major component of the
tough outer (
exine)
walls of
plant spores and
pollen grains. It is
chemically very
stable (one...
-
binucleate pollen,
which has a
thicker exine and the
second is
trinucleate pollen,
which has a
thinner exine.
Binucleate pollen has a
higher lifespan...
-
identified under magnification (600×) by
their characteristic granular exines bearing three con****uous pores.
Corylus has
around 14–18 species. The cir****scription...
- species. Many
Aroideae have
spiny pollen grains without a
sporopollenin outer exine layer and
lacking an aperture. It includes:
Aglaodorum Schott Aglaonema...
- One
characteristic which most
species in this
group share is a lack of an
exine, or
protective layer,
around the
pollen grain. Paul
Knuth identified two...
- type. Von
Ubish concluded that
orbicules are
homologous with the
pollen exine, as both
showed the same
reaction to
chemicals and
stains and they developed...
- area, a long colpus, a
lalongate endoaperture, a caveate[check spelling]
exine and an
echinate ****ine.
Verbesina alternifolia Verbesina auriculigera Verbesina...
- petal-like
tepals and a
black centre. The
pollen is dry, has an
unsculpted exine, is less than 40 nm in diameter, and is
usually deposited within 1.5 m of...
- The
outer part has a
hexagonal crystalline structure and is
called exine.
Exine is
partially hydrolyzed by
trypsin and is
resistant to lysozyme, in contrast...
