Fig. 4
From: Effect of temperature stress on the early vegetative development of Brassica oleracea L.
Effect of temperature on the fluorescence transient and JIP test parameters of two cultivars of Brassica oleracea expossed to chilling (12 °C) and high (32 °C) temperatures. a. Chlorophyll a fluorescence transient curve expressed on a logaritmic time scale. b. Different parameters (F0, minimal fluorescence; M0, initial slope of the fluorescence transient; Sm, area above the OJIP transient; φPO, maximum quantum yield of primary photochemistry; PI, performance index of fast fluorescence transient in two cultivars of Brassica oleracea. Data from the control were used to normalized the different parameters. Log2-transformed normalized values are represented on ordinate. * P < 0.05 (treatment vs. control)