[Single-cell Synechococcus WH8102 XRMA elemental data] - Single-cell elemental quotas and stoichiometry of Synechococcus sp. WH8102 measured by X-ray microanalysis (XRMA) under varying phosphorus conditions (Collaborative Research: Assessing the role of polyphosphate production and cycling in marine ecosystem functioning)

WH8102, obtained using XRMA (X-ray microanalysis) combined with microscopy-based cell size measurements. Cells were analyzed under different experimental phosphorus (P) conditions and timepoints to quantify cellular carbon (C), nitrogen (N), and phosphorus (P) content at the single-cell level.

Cell size was determined using two independent approaches: 1)XRMA-associated SEM measurements (A_um2_xray) 2)ImageJ-based image analysis (A_um2_imageJ). Cellular volume was estimated using a rod-shaped cell geometry model, allowing conversion from projected cell area to volume (µm³). Elemental quotas (C_fg_cell, N_fg_cell, P_fg_cell) were measured in femtograms per cell, and normalized to volume where applicable.