Winogradsky column lab page!

Welcome to the Winogradsky column lab page! Students from the Departments of Biological Applications and Technology, University of Ioannina and Icthyology and Aquatic Environment, University of Thessaly, Greece and the Microbiology course, Faculty of Sciences, University of Cádiz, Spain, discuss their findings on Winogradsky columns they constructed!

If you want to add a post, please feel free to contact the blog administrators (Hera Karayanni, Sokratis Papaspyrou or Kostas Kormas)!

Καλωσορίσατε στη σελίδα των Winobloggers! Διαδικτυακός τόπος συνάντησης φοιτητών, φοιτητριών και διδασκόντων δύο Τμημάτων από την Ελλάδα: Tμήμα Βιολογικών Εφαρμογών και Τεχνολογιών, Παν/μιο Ιωαννίνων και Τμήμα Γεωπονίας, Ιχθυολογίας και Υδάτινου Περιβάλλοντος, Παν/μιο Θεσσαλίας και ενός από την Ισπανία: Σχολή Θετικών Επιστημών, Πανεπιστήμιο του Cadiz. Παρακολουθούμε, σχολιάζουμε, ρωτάμε, απαντάμε σχετικά με τα πειράματά μας, τις στήλες Winogradsky!

Bienvenidos a la pagina web de los Winobloggers! Aquí los estudiantes y profesores de dos departamentos griegos, el Departamento de Aplicaciones y Tecnologías Biológicas de la Universidad de Ioannina y el Departmento de Agricultura, Ictiología y Sistemas Acuáticos de la Universidad de Thessalia, junto con los estudiantes de Microbiología de la Facultad de Ciencias en la Universidad de Cádiz, se reúnen para observar, comentar, preguntar y responder a preguntas relacionadas con nuestro experimento, la columna Winogradsky.

Winogradksy columns

Winogradksy columns
'In the field of observation, chance only favors the prepared mind' Pasteur 1854

Blog posts

Sunday, 20 May 2018


A few weeks after the preparation of the column, we observed both of them, and we noticed some changes.
The C3 group’s column presents the following characteristics:
  • The orange spots are photoheterotrophic microorganisms, which use as power source the solar energy, and reduced iron.
  • At the surface, we could find green algae and cyanobacteria, since they need oxygen to perform the cellular respiration and sunlight to make the photosynthesis.
  • Along the column, we could find tiny white spots, which can be elementary sulfate.
  • We could also see small bubbles, which can be due to the fermentation of the chemoheterotrophic micoorganisms.
  • We can appreaciate along the column some black spots, which are more intense at the bottom of it. They are due to the anaerobic microorganisms, being stronger as the oxygen gradient decreases.

The C4 group’s column differs from the C3’s in the following characteristics. The rest of the microorganisms are the same as the other one.
  • We can find along the coloumn oxidizing bacteria.
  • The photoheterotrophic microorganisms of the column use as carbon source the cellulose of paper, and as power source the sunlight.
  • It doesn’t present white spots since it didn’t contain sulfate.
  • The orange spots are bigger, because of the cellulose that the paper provided.

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