Transcriptional response of the marine pennate diatom Phaeodactylum tricornutum to Fe limitation

ABSTRACT: Diatoms, which are responsible for up to 40% of the 45 to 50 billion metric tons of organic carbon production each year in the sea, are particularly sensitive to Fe stress. Here we describe the transcriptional response of the pennate diatom Phaeodactylum tricornutum to Fe limitation using a partial genome microarray based on EST and genome sequence data. Processes carried out by components rich in Fe, such as photosynthesis, mitochondrial electron transport and nitrate assimilation are down-regulated to cope with the reduced cellular iron quota. This retrenchment is compensated by nitrogen (N) and carbon (C) reallocation from protein and storage carbohydrate degradation, adaptations to chlorophyll biosynthesis and pigment metabolism, removal of excess electron s by mitochondrial alternati

ORGANISM(S): Phaeodactylum tricornutum

SUBMITTER: Chris Bowler 

PROVIDER: E-GEOD-8675 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress