Table III.

Cytokinin contents of tobacco leaves (pmol mg⁻¹ chlorophyll) and chloroplasts (fmol mg⁻¹ chlorophyll) at the end of 12 h of light and 12 h of darkness

Plant Parta	Z	ZR	DZ	DZR	2iP	2iPA	ZMP	DZMP	2iPMP	ZN7G	DZN7G	ZN9G	DZN9G	2iPNG	ZROG	DZROG
L-L	Trb	0.26	Tr	0.07	0.10	Tr	0.10	0.04	0.10	Tr	Tr	0.16	0.18	0.11	NDc	ND
L-D	Tr	0.60	0.09	0.29	0.09	0.06	0.35	0.13	0.21	Tr	Tr	0.69	0.40	0.24	ND	ND
C-L	1.12	4.42	1.85	0.83	2.14	1.81	10.86	0.95	2.33	Tr	Tr	4.93	6.37	1.32	ND	ND
C-D	Tr	28.71	Tr	9.17	16.60	1.87	39.42	5.48	31.48	1.82	4.14	125.7	164.9	13.25	67.33	19.41

^aL-L, Leaves in light; L-D, leaves in darkness; C-L, chloroplasts in light; C-D, chloroplasts in darkness. 

^bTr, Trace. 

^cND, Not detected.