Chloroplast development in Arabidopsis thaliana requires the nuclear-encoded transcription factor Sigma B

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Abstract

Development of plastids into chloroplasts, the organelles of photosynthesis, is triggered by light. However, little is known of the factors involved in the complex coordination of light-induced plastid gene expression, which must be directed by both nuclear and plastid genomes. We have isolated an Arabidopsis mutant, abc1, with impaired chloroplast development, which results in a pale green leaf phenotype. The mutated nuclear gene encodes a sigma factor, SigB, presumably for the eubacterial-like plastid RNA polymerase. Our results provide direct evidence that a nuclear-derived prokaryotic-like SigB protein, plays a critical role in the coordination of the two genomes for chloroplast development. (C) Federation of European Biochemical Societies.

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Shirano, Y., Shimada, H., Kanamaru, K., Fujiwara, M., Tanaka, K., Takahashi, H., … Shibata, D. (2000). Chloroplast development in Arabidopsis thaliana requires the nuclear-encoded transcription factor Sigma B. FEBS Letters, 485(2–3), 178–182. https://doi.org/10.1016/S0014-5793(00)02216-X

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