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New Plant Kingdoms Picked|
New Look at Evolution Alters Theories
S T. L O U I S, Aug. 5 The plant and animal kingdoms actually represent five distinct groups, according to scientists who announced discoveries that fundamentally alter long-standing theories about the evolution of plants.
Researchers presented data showing that green plants, red plants and brown plants (mostly algae and seaweeds), evolved from three different one-celled plants, and so deserve to be considered individual kingdoms.
The researchers are among 200 scientists from 12 countries involved in the Deep Green project, a five-year effort to reconstruct the evolutionary tree of life for green plants.
They found that the many families of green plants living on land today descended from a single, green freshwater Eve, a relative of which still lives in pristine lakes as it did more than a billion years ago.
More Complete Tree of Life
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S U M M A R Y|
By finding that plants, red plants and brown plants evolved from three different one-celled plants, scientists are opening up new questions in how the plant world works.