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.
Erscheinungsdatum: 12.10.2011

lgrsnf/D:/HDD4/!genesis/1/SPR_NEW_2014-01/bok%3A978-1-4613-0853-9.pdf

nexusstc/Prochloron: A Microbial Enigma/f36d191b524112fbb5114e5cab1c4870.pdf

zlib/Housekeeping & Leisure/Gardening/Ralph A. Lewin (ed.), Lana Cheng (ed.)/Prochloron: A Microbial Enigma_2317381.pdf

Ralph A. Lewin (ed.), Lana Cheng (ed.)

Springer London, Limited

Current Phycology Ser, Boston, MA, 1989

United States, United States of America

Springer Nature, New York, NY, 2012

Oct 12, 2011

0

lg1148704

{"edition":"1","isbns":["1461282039","1461308534","9781461282037","9781461308539"],"last_page":130,"publisher":"Springer"}

Source title: Prochloron: A Microbial Enigma (Current Phycology)

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 chloroƯ 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

Front Matter....Pages i-xiii
Introduction....Pages 1-7
Collection and Handling of Prochloron and Its Ascidian Hosts....Pages 9-18
Prochloron in Symbiosis....Pages 19-29
Physiological and Cellular Features of Prochloron ....Pages 31-52
Biochemical Features of Prochloron ....Pages 53-64
Phylogenetic Considerations of Prochloron ....Pages 65-69
The Cytology of Prochloron ....Pages 71-81
Status Report on Prochlorothrix hollandica , a Free-Living Prochlorophyte....Pages 83-87
Epilogue....Pages 88-88
Back Matter....Pages 89-129

2014-02-12