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X-WR-CALNAME;VALUE=TEXT:Dr. Patricia Sanchez-Baracaldo (University of Bristol)  "Origin of photosynthesis and major Cyanobacteria groups - implications for the interpretation of the geological record" 
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SUMMARY:Dr. Patricia Sanchez-Baracaldo (University of Bristol)  "Origin of photosynthesis and major Cyanobacteria groups - implications for the interpretation of the geological record" 
DESCRIPTION:<p>	Abstract: </p><p>	 </p><p style="text-align:justify">	<span lang="EN-GB"><span style="background:white"><span style="color:#252525">Oxygenic phototrophs have played a fundamental role in Earth’s history by enabling the rise of atmospheric oxygen (O<sub>2</sub>) and paving the way for complex life.  Their origin fundamentally transformed the biology and geochemistry of our planet. </span></span></span><span lang="EN-GB">During my talk, I will highlight some of the key events in the evolutionary history of Cyanobacteria: the Archean origin of PSII (</span><span lang="EN-GB"><span style="background:white"><span style="color:#252525">the photochemical reaction center that catalyzes the light-driven oxidation of water to molecular oxygen), the origin of the crown group of Cyanobacteria, the emergence of filamentous forms around the Great Oxidation Event (2.32 Ga), and the late emergence of marine planktonic groups between 800-600 Mya.  Molecular evolution analyses overall show that there is a huge lag between the Archean origin of oxygenic photosynthesis and planktonic forms at the end of the Precambrian. By studying the ‘genomic record’ we can now unravel </span></span></span><span lang="EN-GB">how oxygenic phototrophs co-evolved with the Earth’s biosphere, thereby making our planet habitable.</span></p><p>	 </p>
LOCATION:Haller Hall, Geological Museum, 24 Oxford Street
STATUS:CONFIRMED
DTSTART:20200205T210000Z
DTEND:20200205T210000Z
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