TABLE 5.

Phytohormone concentration (pmol/g PF) of abscisic acid (ABA), salicylic acid (SA), indoleacetic acid (IAA), jasmonic acid (JA), jasmonyl-L-isoleucine (JA-Ile), and cytokinins) in new leaf of cucumber plants under different Fe treatments [21 days of Fe sufficiency (+Fe), 10 days of sufficiency + 7 days of Fe deficiency ((−Fe)), and 3 days more of refertilization with ⁵⁷Fe ((−Fe) + Fe)] and Si treatments [Si applied to root (+SiR), leaves (+SiF), and no Si ((−Si)) application].

Phytohormones Concentration (pmol / g FW)
		+Fe			(−Fe)			(−Fe)+Fe
		+SiR	+SiF	(−Si)	+SiR	+SiF	(−Si)	+SiR	+SiF	(−Si)
Root	ABA	3.28 ± 0.57b	4.59 ± 0.84a	2.69 ± 0.77b	2.2 ± 1.0b	4.1 ± 0.4a	2.6 ± 0.2b	3.14 ± 0.14b	4.53 ± 0.75a	3.63 ± 0.39b
	SA	484.7 ± 259.0b	684.1 ± 116.2a	652.3 ± 64.2ab	635.4 ± 166.8b	457.4 ± 23.7b	970.8 ± 175.6a	554.3 ± 50.1b	1190.3 ± 476.5a	1565.2 ± 255.1a
	IAA	43.4 ± 3.3a	47.3 ± 5.3a	35.3 ± 5.3b	38.0 ± 12.1a	38.7 ± 5.5a	12.5 ± 1.4b	28.4 ± 5.9b	48.1 ± 4.1a	30.3 ± 8.2b
	JA	30.0 ± 0.5a	19.6 ± 3.5b	39.6 ± 15.3a	19.2 ± 2.2a	9.3 ± 0.3b	7.2 ± 2.4b	20.8 ± 8.4a	17.8 ± 2.9a	10.7 ± 0.3b
	JA- Ile	0.55 ± 0.08b	0.55 ± 0.11b	1.58 ± 0.19a	1.13 ± 0.19a	0.78 ± 0.26a	0.98 ± 0.46a	1.05 ± 0.03a	0.38 ± 0.09c	0.50 ± 0.10b
	Ck	3.94 ± 0.96a	3.58 ± 0.10a	4.49 ± 0.48a	3.31 ± 0.10b	3.66 ± 0.10ab	3.99 ± 0.58a	5.18 ± 0.34a	3.93 ± 0.26b	4.14 ± 0.79b
Old Leaves	ABA	68.7 ± 5.4b	65.9 ± 3.3b	77.4 ± 9.5a	53.3 ± 14.9a	42.4 ± 17.4a	46.8 ± 10.1a	114.9 ± 28.1a	45.6 ± 4.3b	51.8 ± 3.0b
	SA	477.1 ± 0.3b	724.7 ± 84.9a	404.8 ± 74.5b	553.2 ± 8.0b	962.1 ± 44.5b	2011.6 ± 845.4a)	680.4 ± 229.5ab	546.8 ± 127.9b	756.2 ± 75.7a
	IAA	8.9 ± 0.7a	10.9 ± 1.4a	10.0 ± 2.6a	6.3 ± 1.0b	11.5 ± 3.1a	9.4 ± 1.5a	11.7 ± 1.2a	12.5 ± 2.4a	11.5 ± 0.3a
	JA	22.9 ± 4.2a	15.6 ± 0.9b	25.6 ± 5.8a	32.2 ± 3.1a	22.0 ± 7.1b	27.3 ± 2.7ab	93.9 ± 14.3b	21.7 ± 7.3c	183.2 ± 98.2a
	JA- Ile	1.07 ± 0.05b	0.38 ± 0.12c	2.01 ± 0.48a	1.55 ± 0.54b	3.74 ± 0.37a	0.69 ± 0.06c	5.58 ± 2.17b	3.72 ± 2.31b	13.4 ± 5.66a
	Ck	3.93 ± 0.47a	3.48 ± 0.36a	3.72 ± 0.68a	3.37 ± 0.10a	3.43 ± 0.28a	2.78 ± 0.45b	3.84 ± 0.15b	5.26 ± 0.32a	4.75 ± 0.21b
New Leaves	ABA	56.4 ± 15.9a	42.0 ± 9.1a	54.5 ± 9.7a	87.4 ± 2.3a	38.8 ± 9.0b	38.8 ± 13.1b	83.5 ± 16.9a	45.6 ± 9.3b	57.8 ± 12.4b
	SA	503.6 ± 23.5a	389.9 ± 77.9b	474.9 ± 61.2a	1305.0 ± 66.9b	2418.1 ± 571.8a	743.4 ± 11.3c	802.6 ± 121.1a	590.5 ± 267.5a	748.1 ± 173.7a
	IAA	12.7 ± 2.9a	8.5 ± 0.5c	11.1 ± 0.9b	13.7 ± 1.7a	5.0 ± 0.5c	10.1 ± 1.3b	14.3 ± 0.9a	16.7 ± 0.1a	16.7 ± 4.4a
	JA	44.5 ± 15.8a	30.2 ± 3.8a	47.0 ± 13.4a	83.4 ± 1.7a	24.7 ± 6.0c	57.8 ± 11.0b	138.9 ± 3.5a	43.1 ± 3.1b	45.6 ± 9.9b
	JA- Ile	1.62 ± 0.29a	0.84 ± 0.12b	1.98 ± 0.74a	2.40 ± 0.63a	0.87 ± 0.28b	0.98 ± 0.45b	7.6 ± 3.40a	0.95 ± 0.11c	3.91 ± 0.39b
	Ck	4.01 ± 0.66b	5.59 ± 0.36a	3.29 ± 0.26c	2.88 ± 0.05a	1.99 ± 0.36b	1.96 ± 0.13b	3.93 ± 0.37a	4.47 ± 0.21a	4.38 ± 0.57a

The data are the mean ± SE (n = 3). Different letters in the same row showed significant differences according to Duncan’s test (p < 0.10).