Genetic Regulation of Chlorophyll Synthesis Analyzed with Mutants in Barley

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Science  17 May 1974:
Vol. 184, Issue 4138, pp. 800-802
DOI: 10.1126/science.184.4138.800


Barley seedlings homozygous both for the xantha-135 and tigrina-d12 mutation accumulate magnesium protopophyrins and other precursors of chlorophyllide constitutively in darkness. The homozygous double mutant xantha-f10, tigrina-O34 produces protoporphyrin constitutively. These results provide evidence for the control of chlorophyllide synthesis in higher plants through the products of regulatory genes in the nucleus.