Chemotaxis to ammonium/methylammonium in Chlamydomonas reinhardtii: the role of transport systems for ammonium/methylammonium

  title={Chemotaxis to ammonium/methylammonium in Chlamydomonas reinhardtii: the role of transport systems for ammonium/methylammonium},
  author={Elena Ermilova and Maxim M. Nikitin and Emilio Fern{\'a}ndez},
Ammonium is the preferred nitrogen source and chemoattractant for the unicellular green alga Chlamydomonas reinhardtii. Here we describe that chemotaxis to methylammonium, a non-metabolizable analogue to ammonium, that occurs only in vegetative cells and pregametes but not in gametes. A new methylammonium-resistant mutant, hat1 that was generated by insertional mutagenesis, has been isolated and found to be affected at multiple loci. At the physiological level, hat1 showed altered K m and V max… CONTINUE READING


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