Abstract: Changes of chloroplast DNA, RNA and protein contents in normal andzinc deficient tomato plants grown under different light intensity were studied in thispaper. It was shown that there is no much difference between normal and zinc deficient chloroplast DNA, RNA and protein e0ntents when the plants were grown underlower light intensity, while the DNA, RNA and protein contents of zinc deficient plantsdecreased dramatically under higher light intensity. The DNA and protein contentsof normal plants increased when light intensity was increased from 18000 lx to 45000 lx.The P700 Chl a-protein complexes and light harvesting Chl a/b-protein complexes of zincdeficient plants decreased seriously under higher light intensity.

Key words: Tomato, Chloroplast, Zinc, Light intensity