A construct that comprises a base material and a polyhydroxyalkanoate, wherein at least a part of the base material is coated with the polyhydroxyalkanoate, and the polyhydroxyalkanoate comprises a 3-hydroxyalkanoic acid unit other than 3-hydroxypropionic acid unit, 3-hydroxy-n-
butyric acid unit, and 3-hydroxy-n-
valeric acid unit.In addition, an electrostatic charge image developing toner allows to design the toner characteristics such as chargeability, flowability, stability in time and 
environmental stability uniform among the toners of different colors. The toner has a 
small particle size enough for enabling uniform dispersion and being excellent in 
color saturation and transparency. The toner also shows higher contribution to the 
environmental security. The toner includes a coloring agent of which at least a part of the surface is covered with polyhydroxyalkanoate (PHA). The toner is produced by dispersing the coloring agent in 
aqueous medium, then fixing PHA synthesizing 
enzyme to the coloring agent dispersed in the 
aqueous medium, then adding 3-hydroxyacyl CoA, and executing a PHA synthesizing reaction to cover at least a part of the surface of the coloring agent with PHA. The toner thus obtained is used for an image forming method.