FIGURE 1.

Macronutrient acquisition functions detected in phototrophic consortium member genomes. Isolates belonging to the Cyanobacteria are green, Alphaproteobacteria are red, Gammaproteobacteria are blue, and Bacteroidetes are yellow. ^aGenomic information derived from sequenced isolates. ^bFor description of the types of proteorhodopsins, see Supplementary Notes 2. ^cSimilar to form IV RuBisCo, and thus unlikely to permit autotrophy (Supplementary Notes 3). ^dThese organisms contain multiple complete nitrate reductases; only one gene of each type of multi-subunit nitrate reductase is denoted to conserve space. ^eWhere organisms have multiple phosphate-acquisition systems, pst denotes the presence of pstSABC. ^fThe pstAB genes are contiguous to a contig edge in the Rhodobacteraceae sp. HLUCCA08 reconstruction; pstSC are assumed to be within the gap between contigs.