Variations in Hormones and Antioxidant Status in Relation to Flowering in Early, Mid, and Late Varieties of Date Palm (Phoenix dactylifera) of United Arab Emirates

Table 1

Variation in hormone concentrations at different stages of growth in the early, mid, and late varieties of date palm.

Variety	Growth stage	GA (μg/g)	IAA (μg/g)	Zeatin (μg/g)	ABA (μg/g)
Early flowering; (Nagal)	Preflowering	32.57 ± 2.4^a	1.59 ± 0.15^a	6.93 ± 0.74^b	1.30 ± 0.17^a
	Flowering	30.28 ± 2.5^b	0.72 ± 0.08^b	5.12 ± 0.63^b	0.90 ± 0.09^b
	Postflowering	31.24 ± 3.5^a	0.97 ± 0.12^a	7.24 ± 0.58^a	0.89 ± 0.16^b
Mid flowering; (Khalas)	Preflowering	19.60 ± 1.9^c	1.77 ± 0.15^a	5.64 ± 0.52^a	1.97 ± 0.21^a
	Flowering	24.58 ± 2.2^b	1.01 ± 0.16^b	4.52 ± 0.84^b	1.25 ± 0.15^b
	Postflowering	28.52 ± 2.6^a	1.82 ± 0.17^a	4.85 ± 0.65^a	1.45 ± 0.22^b
Late flowering; (Lulu)	Preflowering	15.33 ± 1.9^c	0.05 ± 0.02^c	2.79 ± 0.43^a	0.63 ± 0.11^a
	Flowering	21.06 ± 2.0^b	0.13 ± 0.03^b	1.88 ± 0.38^b	0.92 ± 0.17^a
	Postflowering	23.12 ± 2.3^a	0.21 ± 0.02^a	2.30 ± 0.41^a	0.62 ± 0.14^a

GA: gibberellic acid, IAA: indole acetic acid, and ABA: abscisic acid.
Values are means of 3 replications in each variety. Means with different letters in the same variety indicate significantly different values at < 0.05.