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Pot-grown leaf-variegated Epipremnum aureum ´Lime´, E. aureum, Ctenanthe lubbersiana, Ajuga repetans var. variegata, Plantago asiatica var. variegata, Lonicera japonica var. aureo-reticulata, and Ligustrum ovalifolium var. aureo-marginatum were experimented to examine both plant growth and leaf variegation as influenced by two different light levels (3,000 and 15,000 lux) and growth regulator treatments with uniconazole and gibberellin. Distribution of gram and thylakoid in chlroroplasts became more distinct in the sun than in the shade. Uniconazole also resulted in more distinct chlororoplasts than control and gibberellin showed opposite result to it. These effects were closely associated with the responses of chlrorophyll contents. The degree of the leaf variegation was much more obviously shown in the sun (20,000lux±500) than in the shade (2,000lux±500). Thus, it resulted in elevating-aesthetical value in the sun. Foliar treatment of uniconazole showed more leaf-variegation than gibberellin did. Especially, this effect was most distinctive at uniconazole 10 ㎎·L^(-1). C/N ratio were higher in the sun than in the shade. Uniconazole increased more carbohydrate level, whereas gibberellin decreased. Leaf anthocyanin formation of Ajuga reptans var. variegata was more obvious with uniconazole treatments in the sun, than with gibberellin treatments in the shade. More elevated activity of leaf peroxidase was founded in the shade than in the sun. And uniconazole reduced more of it than control and gibberellin somewhat increased it. Thus, variations in light condition manifest a difference in the extent of leaf variegation with certain physiological modifications.
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