Abstract
A detailed study of the white, luteus, virescent, and pale-green mutants of maize revealed that a close correlation exists between plastid size and chlorophyll development in all but the luteus plants. 2. Abnormal plastids in the bundlesheath cells of the mutant plants were described and were thought to result from a distention by osmosis of the semipermeable membrane surrounding the immature plastids. 3. All the luteus plants studied were found to contain small amounts of chlorophylls a and b. 4. The chlorophylls were eliminated as the cause of the lethality of many pale greens, since both chlorophylls a and b, as determined by spectroscopic analysis, were found to be abundant in the lethal as well as in the viable mutants.
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