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Admittedly, this looks particularly colorful prehistoric Polle under the microscope, not just from (Photo: AP). Wednesday 02 October 2013
shine in all the colors of life and make the world a better place -. according to Swiss scientists even since 240 million years, almost twice as long as previously thought
flowering plants, there were probably already 100 million years earlier than previously thought. Scientists at the University of Zurich found in fossil pollen cores, they specify their age with about 240 million years. They make their study in the journal “Frontiers in Plant Science” before.
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flowering plants evolved from now-extinct plants that were related to conifers, ferns and cycads. When exactly caused the flowering plants is not known. The oldest finds of fossil pollen are from the early Cretaceous period, about 140 million years ago. Whether it previously gave flowering plants, is controversial among experts. Among plant fossils found pollen grains are very common because they are small and robust and therefore easier to petrify than about leaves or flowers.
Peter Hochuli and Susanne Feist-Burkhardt of the University of Zurich now report findings in pollen cores from northern Switzerland, dating back to the Triassic and are about 240 million years old. As early as 2004, scientists had similar old fossil pollen found 3000 km further north in cores from the Barents Sea. They hope their new findings to be able to convince very restrained experts expect that flowering plants have developed long before the beginning of the Cretaceous.
Middle Triassic both the Barents Sea and Switzerland were in the subtropics. The Swiss region was, however, very much drier than the region around the Barents Sea today. This put suggest that flowering plants had been inhabited different ecological areas, the researchers write. The pollen structure tends to suggest that the plants were fertilized by insects, most likely by beetles.
Source: n-tv.de
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