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. 1981 Jun;67(6):1090–1096. doi: 10.1104/pp.67.6.1090

Synthesis of Chloroplast Proteins during Germination and Early Development of Cucumber

Richard Walden 1,1,2, Christopher J Leaver 1
PMCID: PMC425840  PMID: 16661815

Abstract

Cell-free protein synthesizing systems have been used to study the developmental changes in the synthesis of chloroplast proteins in the cotyledons of cucumber seedlings grown in the light or in the dark. Escherichia coli and wheat germ in vitro protein synthesizing systems have been used to assay the changes in the levels of the mRNA's coding for ribulose 1,5-bisphosphate carboxylase (RuBPCase). The large subunit of cucumber RuBPCase has been identified among the translation products of the E. coli system. The wheat germ system translates the cucumber mRNA coding for the small subunit of RuBPCase to produce a 25,000 molecular weight precursor polypeptide. Plastids isolated from light-grown cotyledons were used to study developmental changes in their capacity to synthesize protein. The data obtained indicate that in the light there is an initial 48-hour period of accumulation of the mRNA's coding for the large and small subunits of RuBPCase, coupled with an increase in the capacity of the isolated plastids to synthesize protein. This is followed by a decline. This decline is not reflected in the accumulation of RuBPCase in the cotyledons which remains constant over the period of study.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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