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Prochloron: A Microbial Enigma (Paperback, Softcover reprint of the original 1st ed. 1989)
Loot Price: R1,433
Discovery Miles 14 330
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Prochloron: A Microbial Enigma (Paperback, Softcover reprint of the original 1st ed. 1989)
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Ralph A. LewiQand Lanna Cheng In physics, the discovery of new
(more properly, hitherto undetected) particles has often resulted
from a search: like the discovery of America, their existence had
been postulated but their actual existence awaited confirmation. In
biology, new discoveries are rarely made in this way. The existence
of an alga like Prochloron, as a putative ancestor of chloro
plasts, had been postulated, but in fact its discovery was a
consequence of fortuitous events. Green algal symbionts in didemnid
ascidians had been known for decades to a few marine zoologists who
had worked in coral reef areas, but nobody had bothered much about
them. When we happened to find them, under boulders on a seashore
in Baja California, Mexico, where we were taking part in a student
expedition, we didn't bother much either at first, though they
worried us a little. With our portable microscope we could see no
nuclei in the cells, which, according to the dogma accepted at the
time, indicated that they were blue-green algae-yet they didn't
look blue-green. They were leaf-green, like green algae and higher
plants. We made desultory attempts to grow them in culture, in
variously enriched seawater media, but failed. (This proved to be a
frustrating experience, all too frequently repeated on subsequent
expeditions. ) We collected enough for electron microscopy, though,
and transmission electron microscopy (TEM) studies indicated that
the cells were unequivocally prokaryotic."
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