Study of the Effect of Pretreatment of Corms by Different Concentrations of Gibberellic Acid and at Different Periods on the Growth, Flowering, and Quality of Saffron in Eastern Morocco

Table 5

Effect of different GA₃ concentrations and duration of application on total chlorophyll content (a + b) and Fv/F0 chlorophyll fluorescence. Values with the same letter in each application period in the column are not significantly different (); ns: not significant; significant at 5%; significant at 1%, significant at 1‰.

Duration of application	Treatment GA3	Chlorophyll content a + b (mg/g FM)		Fv/F0
		2017	2018	2017	2018
Before planting	Control	1.30b	1.22b	0.73c	0.81a
	25 ppm	1.26b	1.20b	0.77bc	0.80b
	50 ppm	1.32b	1.24ab	0.80b	0.80b
	100 ppm	1.66a	1.26a	0.83a	0.82a
	200 ppm	1.41ab	1.21b	0.81ab	0.84a
June	Control	1.51a	1.41a	0.78ab	0.82a
	25 ppm	1.32c	1.34b	0.77b	0.81a
	50 ppm	1.36b	1.37b	0.79a	0.81a
	100 ppm	1.52a	1.48a	0.81a	0.82a
	200 ppm	1.36b	1.32b	0.79a	0.81a
March	Control	1.40a	1.32b	0.73d	0.82a
	25 ppm	1.34b	1.46a	0.76c	0.84b
	50 ppm	1.22c	1.41a	0.73d	0.82a
	100 ppm	1.31b	1.36b	0.84a	0.83a
	200 ppm	1.49a	1.44a	0.80b	0.84a
Source of variation	Treatment	0.241	0.006ns	0.049ns	0.009ns
	Period	0.033	0.208ns	0.001ns	0.004ns
	T ∗ P	0.264	0.092ns	0.022ns	0.018ns