A Proton Buffering Role for Silica in Diatoms

  title={A Proton Buffering Role for Silica in Diatoms},
  author={Allen J. Milligan and F. Morel},
  pages={1848 - 1850}
  • Allen J. Milligan, F. Morel
  • Published 2002
  • Chemistry, Medicine
  • Science
  • For 40 million years, diatoms have dominated the reverse weathering of silica on Earth. These photosynthetic protists take up dissolved silicic acid from the water and precipitate opaline silica to form their cell wall. We show that the biosilica of diatoms is an effective pH buffer, enabling the enzymatic conversion of bicarbonate to CO2, an important step in inorganic carbon acquisition by these organisms. Because diatoms are responsible for one-quarter of global primary production and for a… CONTINUE READING
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