Re: HYB: pigments - review of plant parts[Linda Mann]
Linda Mann wrote in her post--
"Both the plastids and the vacuole are self-contained parts located in the
Exactly! The cell has two basic zones--the nucleus and the cytoplasm.
What is inside the nucleus is the stuff making up chromosomes at certain
stages of a cell's life--and the structures necessary to that process.
The "cytoplasm" is the rest of what is outside the nucleus.
Within the cytoplasm, there are a number of structures.
The boundary membranes are made up of "lipids" in two layers (primarily) with
their polarities oriented so that water and the lipids stay separate. The
"polarity" is a matter of electrical charge at the level of atoms.
Thus, the lipids act as bags or boxes inside of which other things can occur.
They are the membranes of the cell, and have a tightly controlled process for
various things moving in or out of the bag or box.
(Lipids are basic components in fats--in case anyone has ever wondered what
the doc meant when he said "Your lipid levels are too high." Cholesterol,
about which few of us have not been cautioned, is a lipid.)
The cytoplasm contains, as Linda says above, "the vacuole and other
self-contained...[actually, contained within membranes]...parts." "Plastids"
are a class of those parts. So are "ribosomes" and a complex network of other
things that are (generically) the "Golgi apparatus" and the "Endoplasmic
reticulum," mitochondria and more.
Linda's suggestion of looking for photos or diagrams is an excellent one if
this stuff doesn't bore the reader stiff.
The vacuole is a storage reservoir, primarily. The rest of the cytoplasm is
the factory zone of the cell. Both are very busy places. The vacuole has a
complex internal structure--which doesn't show up in simple photomicrography.
If I remember rightly, polarized light or some such method reveals strands and
structures--very much on the move.
I have never (yet) found a description of exactly what role the various
pigments--Lycopene, various Carotenes, Anthocyanins, Flavenols in general,
Xanthones, Xanthophylls, etc.--actually play INSIDE the cell--they probably do
But--pigments do play a highly significant role in attracting "reproductive
vectors"--bugs, birds, people, whatever, that get pollen from one place to
The more interesting the pigments and its patterns are to the bugs, etc., --
the more likely the conception of new offspring. We hybrid-makers and
cross-recorders are examples of this class of "vectors."
Hello....hello?...Where'd everybody go?
Neil Mogensen z 7 western NC mountains
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