Figure 2.

Representative responses of g_sthermal and g_s to a 90% drop in PPFD for two accessions: PI455257 and PI525728. g_sthermal was measured from thermal imaging as a proxy for g_s. Each g_sthermal response curve was measured on a single leaf, acclimated to PPFD = 750 µmol m⁻² s⁻¹ for 40 min, then PPFD was reduced by 90% for 60 min at t = 0, indicated by an arrow. On a subset of plants, including the two shown here, the protocol was immediately repeated to measure g_s using the gas exchange.