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

Friday, 20 May 2016

UCA_1B_4: Day 74: Civil War: Dark vs Light

Our column still remains the same and we don´t expect any more changes. Our column was in the dark side.
However, we can appreciate so many differences between our bottle and the one in the light side, which was the column made by the group 11B.

As in our column, in here we can see H2S at the bottom of the bottle, but in this case it has appeared  another microorganisms that grew depending on the light they were receiving.
In the side where the light strikes directly, microorganisms with differents color have developed.
The dark violet patches are sign of the presence of the sulfur bacteria. Next to them some iron oxidizing bacteria have grown. They are orange and we think they are the same that were on the top of the column which stayed in the dark side, even though we don´t know why they are there.
On the other hand, the side where the bottle wasn´t receiving direct light, has an intense green color, corresponding to the green sulfur bacteria.

On the top of the bottle we can see heterotrophic bacteria, with a green and brown color.

1 comment:

  1. The orange you see in the light column and the orange in the dark column are not the same. The first are light-dependent iron oxidisers and the second, in the dark, are iron oxides, probably in combination with sulfates, that precipitate (light does not play a role here).

    The green microorgaisms you see on the side are simply cyanobacteria. Green sulfur bacteria need a lot of sulfide and would not grow there. The same is true for the green "bacteria" on top. They are not heterotrophic bacteria but cyanobacteria or green algae.