Fig. 4.

Differences in metabolite contents between Zygnema sp. cells at different stages from young cells to pre-akinetes under laboratory and field conditions. (A) Metabolites differentially accumulated between young cells (Y), stationary culture (S), and pre-akinetes (A) grown in the laboratory (one-way ANOVA P-value <0.01 after FDR correction, max log₂ ratio >1). (B) Differences in metabolite contents between field-collected young cells and pre-akinetes (t-test P-value <0.01 after FDR correction, log₂ ratio >1). Abbreviations: AA, amino acids (and associated metabolites); APO, apolar compounds; FA, fatty acids; OA, organic acids; SUG, sugars; PHOSPHO, phosphorylated compounds.