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

Monday, 29 May 2017

A month later

In our Winogradsky's column we can differentiate three zones:

A higher zone of green colour where cyanobacterias and algae that liberate oxygen to environment are situated keeping this zone aerobic.

The second zone is of purple colour, we can find sulphate reducing bacterias, this bacterias give purple colour to this zone. Sulphides are liberated by bacterias to oxygenated highes zone creating a gradient where photosynthetic bacterias that use sulphur are developed.

Finally in the lower zone, what is of black colour there are micro-organisms that make anaerobic breathing or they make fermentatives process producing alcohol and fatty acids like subproducts of their metabolism. This products are substrate to growth of sulphate reducing bacterias.

In conclusion we noticed that a gradient of oxygen and an interdependence between zones of column with different micro-organism is established like we thought.

In the Winogradsky's column put in the dark, no micro-organism have been developed since they need light as energy.

The third week:

One month later:

1 comment:

  1. Nice colours.
    I can assure you that in the dark, the column is full of bacteria. You do not see colours (as many as in the light) because the colours in the column in the light are produced by the pigments that photosynthetic bacteria produce to capture the energy from the light.

    Also in the light the pink colour is from purple sulfur bacteria, not sulfate reducing bacteria. The latter produce hydrogen sulfide that is being used by the former. Your poop is my food.