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 3

Variation in antioxidant enzyme activities at different stages of growth in the early, mid, and late varieties of date palm.

Variety	Growth stage	SOD	CAT	POX	APX
Nagal	Preflowering	0.433 ± 0.067^a	0.665 ± 0.088^c	0.559 ± 0.042^a	0.830 ± 0.108^a
	Flowering	0.353 ± 0.045^b	1.338 ± 0.044^b	0.483 ± 0.025^a	0.467 ± 0.041^b
	Postflowering	0.384 ± 0.017^b	1.755 ± 0.187^a	0.227 ± 0.033^b	0.447 ± 0.123^b
Khalas	Preflowering	0.426 ± 0.096^a	0.116 ± 0.006^a	0.165 ± 0.014^a	2.158 ± 0.048^a
	Flowering	0.501 ± 0.092^a	0.110 ± 0.021^a	0.263 ± 0.072^a	1.820 ± 0.039^a
	Postflowering	0.210 ± 0.063^b	0.100 ± 0.007^a	0.049 ± 0.017^b	1.338 ± 0.068^b
Lulu	Preflowering	0.526 ± 0.064^a	1.035 ± 0.066^b	0.729 ± 0.053^a	0.935 ± 0.104^a
	Flowering	0.468 ± 0.045^b	1.958 ± 0.094^a	0.341 ± 0.029^b	0.516 ± 0.046^b
	Postflowering	0.390 ± 0.017^b	1.805 ± 0.120^a	0.658 ± 0.035^a	0.619 ± 0.172^b

SOD: superoxide dismutase, CAT: catalase, POX: peroxidase, and APX: ascorbate peroxidase.
Means with different letters in the same variety indicate significantly different values at < 0.05.