Table II. Endogenous cytokinin content of 14-d-old Arabidopsis plants after 1 or 3 d of treatment with 10 µm 2-iP or Phe-Ade.

Data shown are in pmol g⁻¹ fresh weight ± sd (n = 3). cis-Zeatin-O-glucoside (cZOG) was below the detection limit. cZ, cis-Zeatin; iPR, 2-isopentenyladenosine; tZR, trans-zeatin riboside; cZR; cis-zeatin riboside; iPRMP, 2-isopentenyladenosine-5′-monophosphate; tZRMP, trans-zeatin riboside-5′-monophosphate; cZRMP, cis-zeatin riboside-5′-monophosphate; iP9G, 2-isopentenyladenine-9-glucoside; tZ9G, trans-zeatin-9-glucoside; cZ9G, cis-zeatin-9-glucoside; tZOG, trans-zeatin-O-glucoside; tZROG, trans-zeatin riboside-O-glucoside; cZROG, cis-zeatin riboside-O-glucoside.

Cytokinin Type	2-iP		Phe-Ade		DMSO
	1 d	3 d	1 d	3 d	1 d	3 d
2-iP	5,843.5 ± 1,666.4	2,553.2 ± 733.5	9.0 ± 0.9	63.1 ± 5.0	1.1 ± 0.2	1.5 ± 0.1
tZ	228.7 ± 9.9	185.3 ± 10.3	0.6 ± 0.0	1.9 ± 0.0	0.6 ± 0.0	0.6 ± 0.0
cZ	7.9 ± 0.2	9.4 ± 0.3	0.2 ± 0.0	0.4 ± 0.0	0.1 ± 0.0	0.1 ± 0.0
iPR	768.5 ± 14.6	851.5 ± 34.3	0.6 ± 0.0	8.6 ± 0.7	0.4 ± 0.1	1.2 ± 0.1
tZR	70.7 ± 3.4	110 ± 4.2	0.2 ± 0.0	0.8 ± 0.0	0.2 ± 0.0	0.3 ± 0.0
cZR	7.0 ± 1.2	27.1 ± 1.2	0.3 ± 0.0	1.5 ± 0.2	0.3 ± 0.0	0.3 ± 0.0
iPRMP	48,320.2 ± 7,023.5	62,529.8 ± 11,476.8	33.7 ± 0.3	957.2 ± 369.2	26.9 ± 1.0	108.4 ± 36.1
tZRMP	2,638.1 ± 240.5	9,800.3 ± 3,132.7	6.2 ± 0.6	22.8 ± 4.7	8.1 ± 1.0	17.5 ± 1.9
cZRMP	216.8 ± 36.4	1,386.2 ± 496.3	9.4 ± 1.8	43.2 ± 20.7	7.5 ± 1.4	13.3 ± 2.7
iP9G	3,033.0 ± 245.0	3,660.1 ± 292.6	4.6 ± 0.7	76.4 ± 7.1	2.4 ± 0.3	2.3 ± 0.1
tZ9G	93.8 ± 5.5	264.3 ± 13.6	2.8 ± 0.1	2.6 ± 0.4	4.3 ± 0.2	4.1 ± 0.1
cZ9G	6.8 ± 0.5	46.5 ± 4.3	0.4 ± 0.0	0.5 ± 0.0	0.4 ± 0.0	0.4 ± 0.0
tZOG	59.7 ± 3.5	165.4 ± 51.9	1.8 ± 0.3	2 ± 0.8	2.6 ± 1.2	3.1 ± 0.2
tZROG	121.2 ± 22.6	243.2 ± 8.4	1 ± 0.4	0.9 ± 0.4	0.7 ± 0.2	0.7 ± 0.0
cZROG	16.6 ± 1.9	32.9 ± 4.4	1 ± 0.2	4 ± 0.5	1 ± 0.1	0.7 ± 0.1