Endosymbiosis Observed

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Endosymbiosis observed, according to a report in Science vol 310, p287, 14 October 2005 and New Scientist, 22 Oct 2005, p23. Endosymbiosis is the theory that cells containing complex membrane bound structures cells such as chloroplasts and mitochondria evolved as a result of one type of single cell engulfing another. In a evolutionist's "little green dream come true" Japanese scientists have observed a single celled organism engulf another cell, which then continues to live in a symbiotic relationship with the engulfing cell. Noriko Okamoto and Isao Inouye of University of Tsukuba have studied a single celled organism named Hatena, which has photosynthetic "plastid" (membrane bound structure) within it. When the cell divides the whole plastid stayed in one of the daughter cells. The other cell develops an engulfing apparatus and engulfs an algal (single celled plant) cell. The algal cell loses its flagellum and some of its internal membranes and support structures, but keeps its nucleus and mitochondria. Thus, the "plastid" in the Hatena is actually an internal symbiotic cell. Debashish Bhattacharya of University of Iowa commented, "If this cell is in any way typical, endosymbiosis was an amazingly strong and immediate force in photosynthetic cell evolution."

Editorial Comment: The process described here may be "endosymbiosis", a symbiotic cell living within another, ("endo" means "within") but it does nothing to explain the origin of mitochondria, chloroplasts and other complex cellular structures. Neither does it explain the evolution of photosynthesis. The algal cell already has mitochondria and photosynthetic apparatus. (Ref. symbiosis, photosynthesis, microbiology)