Technical Report: The rapid A–Ci response: photosynthesis in the phenomic era ($)

Large-scale phenotyping efforts depend on large numbers of measurements, so the time taken for any one measurement has a big effect on the number of samples that can be processed. Stinziano et al. describe a breakthrough in the method used to identify the photosynthetic parameters V_c,max  (maximum rate of Rubisco carboxylation) and J_max (maximum rate of electron transport) from measurements of CO₂ uptake (A) at different intercellular concentrations of CO₂ (C_i). Remarkably, the new method, rapid A–C_i response (RACiR), produces essentially the same parameters as the conventional approach, but with the ability to screen hundreds rather than tens of plants per day. Plant Cell Environ. 10.1111/pce.12911