The nuclear-encoded, thylakoid-bound early light-inducible protein (ELIP) reported to be related to the initial stages of chloroplast differentiation is synthesized in substantial amounts in leaves of mature plants exposed to light stress conditions (Adamska, I., Ohad, I., and Kloppstech, K. (1992b) Proc. Natl. Acad. Sci. U.S.A. 89, 2610-2613). Increase in ELIP content correlates with the photo...