cultures. Algal hydrogen photoproduction was obtained in sugar-containing media only
when the green alga Chlamydomonas reinhardtii was co-cultured with Pseudomonas putida
(40.8 ml H 2· L− 1), Escherichia coli (35.1 ml H 2· L− 1) and Rhizobium etli (16.1 ml H 2· L−
1). Hydrogen photo-production in these co-cultures was not only linked to the induction of
hypoxia, but to the ability of the bacteria to produce acetic acid from sugars. Synergetic …