Chlamydomonas reinhardtii thermal tolerance enhancement mediated by a mutualistic interaction with vitamin B12-producing bacteria.

ABSTRACT: Temperature is one of the most important environmental factors affecting the growth and survival of microorganisms and in light of current global patterns is of particular interest. Here, we highlight studies revealing how vitamin B12 (cobalamin)-producing bacteria increase the fitness of the unicellular alga Chlamydomonas reinhardtii following an increase in environmental temperature. Heat stress represses C. reinhardtii cobalamin-independent methionine synthase (METE) gene expression coinciding with a reduction in METE-mediated methionine synthase activity, chlorosis and cell death during heat stress. However, in the presence of cobalamin-producing bacteria or exogenous cobalamin amendments C. reinhardtii cobalamin-dependent methionine synthase METH-mediated methionine biosynthesis is fu

SUBMITTER: Xie B 

PROVIDER: S-EPMC3721113 | biostudies-literature | 2013 Aug

REPOSITORIES: biostudies-literature