Mutants of Circadian-Associated PRR Genes Display a Novel and Visible Phenotype as to Light Responses during De-Etiolation of Arabidopsis thaliana Seedlings

Takahiko KATO; Masaya MURAKAMI; Yuko NAKAMURA; Shogo ITO; Norihito NAKAMICHI; Takafumi YAMASHINO; Takeshi MIZUNO

doi:10.1271/bbb.60642

Biochemistry & Molecular Biology Communications

Mutants of Circadian-Associated PRR Genes Display a Novel and Visible Phenotype as to Light Responses during De-Etiolation of Arabidopsis thaliana Seedlings

Takahiko KATO, Masaya MURAKAMI, Yuko NAKAMURA, Shogo ITO, Norihito NAKAMICHI, Takafumi YAMASHINO, Takeshi MIZUNO

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Keywords: Arabidopsis thaliana, circadian rhythm, chlorophyll synthesis, de-etiolation, plant clock

JOURNAL FREE ACCESS

2007 Volume 71 Issue 3 Pages 834-839

DOI https://doi.org/10.1271/bbb.60642

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Abstract

In Arabidopsis thaliana, it is currently accepted that certain mutants with lesions in clock-associated genes commonly display hallmarked phenotypes with regard to three characteristic biological events: (i) altered rhythmic expression of circadian-controlled genes, (ii) changes in flowering time, and (iii) altered sensitivity to red light in elongation of hypocotyls. During the course of examination of the clock-associated mutants of PSEUDO-RESPONSE REGULATORS, PRRs, including TOC1 (PRR1), we found that they commonly show another visible phenotype of anomalous greening responses upon the onset to light exposure of etiolated seedlings. These findings are indicative of a novel link between circadian rhythms and chloroplast development.

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