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, 21 November 2016


Team 7: Serasidis Konstantinos, Tsinoglou Makrina
Week: 2,3

Second week’s observation: 04/11/2016
Between the first’s week observation and the second’s a few changes have been noticed. Firstly, the sediment seems darker in both columns, a clear indication that the anaerobic bacteria in the column are flourishing and cause reduction of oxygen. Also, the water of the column held in dark seems clearer than the previous week probably because all of the sediment has settled down. The water of the control Column appears to have a bright red-orange color that was only noticeable on the surface of the sediment on the first week.  Between the two columns (Control and in the dark for the second week) the only difference that is noticeable is the color. The water is colored bright red in the Control column and is not in the Column in the dark. The color of the water can be explained by the presence of  purple non-sulfur bacteria. These include species of Rhodopseudomonas, Rhodospirillum and Rhodomicrobium. These bacteria grow in anaerobic conditions, gaining their energy from light reactions but using organic acids as their carbon source for cellular synthesis. So they are termed photoheterotroph .Therefore, it’s only reasonable for the bright red color to appear in the Control column that is exposed to light. Additionally, green color doesn’t appear in the column so we assume that photosynthetic bacteria they haven’t grown yet. 

1. Control column                                                                     2.Column in the dark 

Third week’s observation: 11/11/2016
Between the second’s week observation and the third’s week the only difference that is noticeable is the color on the Control column that seems to be more dark that the previous week. This indicates the increasing growth of bacteria in the column. 

1. Control column                                                                         2.Column in the dark 

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